Skip to content
EcoFlow Delta Pro Power Station Review. Ecoflow inverter efficiency

EcoFlow Delta Pro Power Station Review. Ecoflow inverter efficiency

    EcoFlow RIVER PRO Extra Battery x1 160W Solar Panel RIVER600PROAMEBSP161

    The EcoFlow RIVER Pro Extra Battery portable solar generator is a powerful source of dependable, clean and renewable energy. With the addition of the x1 160W portable solar panel, wether you are at home and need emergency backup power or tailgating at the big game, this portable generator plus solar panel has you covered. The RIVER Series is one of the most versatile portable power stations around and represents the new standard of battery-powered generators. Compatible with a wide range of devices, you can stay powered for hours whenever and wherever.

    The RIVER Pro

    3 x 600W AC OUTLETS AND 720Wh CAPACITY The RIVER Pro can power up to 10 devices simultaneously with multiple outlet options, including 3 pure sine wave AC outlets. It offers up to 720Wh power and it weighs just 16.8 lbs, which makes it a portable power source for adventure on the go.

    RECHARGE FROM 0-80% WITHIN 1 HOUR The patented EcoFlow X-Stream technology enables you to charge the RIVER Pro from 0%-80% within one hour and offers a full charge in just 1.6 hours.

    DOUBLE CAPACITY FROM 720Wh to 1440Wh Add a RIVER Pro Extra Battery (included) to double the capacity from 720Wh to 1440Wh. This is ideal for situations like traveling, camping, or group outdoor activities where you need more power for more devices.

    POWER A WIDE RANGE OF APPLIANCES The RIVER Pro can power some devices up to 1800W with the X-Boost mode on, which lets you power about 80% of essential devices like kitchen appliances and DIY tools. Use devices below 1200W for the best product use.

    RIVER Pro Extra Battery

    POWER A WIDE RANGE OF APPLIANCES The RIVER Pro can power devices up to 1800W with X-Boost, which lets you power around 80% of home appliances and DIY tools. Use devices below 1200W for the best product use.

    COMPACT AND PORTABLE The RIVER Pro weighs just 15.9 lbs and the RIVER Pro Extra Battery weighs 15.4 lbs, making them both portable and easy to transport. The RIVER Pro Extra Battery can easily fit in a car trunk, on a campsite, or indoors, giving you the power to take your adventure anywhere.

    60W Solar Panel

    PORTABLE AND FOLDABLE: The EcoFlow 160W Solar Panel is portable, foldable, and compact, weighing just 15.4lbs / 7kg. From camping to outdoor activities, unfold the solar panel and start capturing solar power in seconds.

    INTELLIGENT SOLAR POWER: The EcoFlow 160W Solar Panel is designed to produce maximum power at any time of the day when paired with an EcoFlow power station. The solar panel has a high conversion efficiency of 21-22%, and the EcoFlow MPPT power station algorithm delivers improved performance in cold and cloudy environments within the operation range.

    DURABLE, DUST AND WATER RESISTANT: The EcoFlow 160W Solar Panel has IP67 rated dust and water resistance, which is thanks to a seamless, one-piece design, making it ideal for outdoor activities like camping and hiking. An ETFE film provides extra protection against ultraviolet light, prolonging the lifespan of the product.

    Kickstand Case Provides protection for the solar panel during transportation. The carrying case also doubles up as a kickstand, which enables you to position the solar power in any direction or orientation, allowing multiple solar panels to be connected together without any obstructions.

    Please NOTE: Free Shipping is only applicable to orders for the US mainland states.

    Maximum Flexibility

    The RIVER Pro Extra Battery doubles the capacity of RIVER Pro from 720Wh to 1440Wh, giving you the freedom to customize your power for any adventure.

    The RIVER Pro weighs just 15.9 lbs and the RIVER Pro Extra Battery weighs 15.4 lbs, making them both portable and easy to transport. The RIVER Pro Extra Battery can easily fit in a car trunk, on a campsite, or indoors, giving you the power to take your adventure anywhere.

    EcoFlow 160W Solar Panel’s Smart Design

    EcoFlow 160W Solar Panel’s Smart DesignThe EcoFlow 160W Solar Panel is portable and foldable, making it ideal for camping, hiking, and outdoor adventures. The solar panel folds into a compact size for transportation, and can be unfolded and set up easily. Whether you are camping, hiking, or going on a road trip, the EcoFlow 160W Solar Panel has got your back. With IP67 rated dust and water resistance, this solar panel is designed for the great outdoors, also featuring an 0.2mm ETFE film that protects the surface from ultraviolet light and prolongs the life of the product. Designed to withstand your adventurous lifestyle, this seamless panel is submersible up to a meter for 30 minutes.

    The 32 premium monocrystalline silicon cells provide a high conversion efficiency of 22%, guaranteeing efficient power in daylight conditions. The total maximum input of the solar panel is subject to environment and operation conditions. Use the solar panel in direct sunlight for the best performance.

    The EcoFlow 160W Solar Panel can be paired with an EcoFlow power station to take advantage of the advanced MPPT solar charge controller, which detects current and voltage in real time. This provides the best solar power performance, even when environmental conditions change.

    Super Quick Charge and Clean Renewable Portable Power

    Solar Panel Compatible: With the EcoFlow Solar Panels, which provide you with a way to generate clean, reliable solar power on the go. Two 110W Solar Panels can be connected in parallel to charge the RIVER PRO with extra battery in 4-8hours.

    Super Fast Re-charge: With the EcoFlow patented X-Stream Technology, the Smart inverter enables a fast recharge that takes less than 1 hour to charge from 0%-80%, and it gets fully charged in 1.6 hours. You can switch to a quieter charging condition by turning on the “Quiet Charging” status on the APP.

    Everybody Can Charge Up: The EcoFlow RIVER PRO can power up to 10 devices simultaneously. With 3 pure sine wave AC outlets, the EcoFlow RIVER can power some devices up to 1800W with the X-Boost mode on. With a capacity of 720Wh, the EcoFlow RIVER PRO provides juice to run essential devices for hours, depending on the actual output.

    Why Buy a Lithium-Ion Battery Generator?

    NO FUEL, NO FUMES, MINIMAL NOISE No gasoline, toxic fumes, and quiet operation. EcoFlow’s Power Station’s are safe to use indoors.

    NO MAINTENANCE Easy to use, keep it plugged into a wall outlet or solar panel.

    NO LOST POWER Power can be stored and consumed as needed, maximizing efficiency.

    LOW COST Costs 30% less than regular gasoline-powered inverter generators over its lifetime.

    Note : It is not recommended to use the RIVER series power station to power heavy-duty devices e.g., air conditioners, ovens or washing machines. Please conduct full test on a case-by-case basis to confirm the X-Boost feature works with your appliances.

    Warning : DO NOT use RIVER series portable power station AC charging cables on DELTA series power stations. EcoFlow takes no responsibilities for any damages caused by customers’ failure to follow instructions. Doing so will void the warranty.

    EcoFlow RIVER Pro Specifications

    Wall Outlet/ Gas Generator 1.6 Hours
    Car Charger (120W) 6.5Hours
    Solar Panel (110W) 4-8 Hours (110Wx2)
    Capacity 720Wh
    Cell Chemistry Lithium-ion
    Shelf Life 1 year (after fully charged)
    Life Span 500 Cycles (80%)
    Management Systems BMS, Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection
    Testing and Certifications UL WERCSmart PROP65 CE FCC RoHS PSE
    AC Charge Input Power X-STREAM: 660W Max
    AC Charge Input Voltage 100-120Vac (50Hz/60Hz)
    Solar Charge Input 200W 10-25V DC 12A Max
    Car Charger Input 12V DC 10A Max
    AC Output (x3) 600W (Surge 1200W)
    USB-A Output (x2) 12W per port, 5V DC, 2.4A Max
    USB-A Fast Charge Output(x1) 28W,5V DC,9V DC, 12V DC 2.4A Max
    USB-C Output (x1) 100W, 5V DC, 9V DC, 12V DC, 15V DC, 20V DC, 5A Max
    Car Power Output (x1) 136W, 13.6V DC, 10A Max
    DC5521 Output (x2) 13.6V DC, 3A Max (per port)
    Net Weight 16 lbs (7.2kg)
    Dimensions 11.4 x 7.1 x 9.3 in (28.9 x 18.0 x 23.5 cm)
    Charge Temperature 32 to 113 degrees F /-5 degrees F(0 to 45 degrees C /-3 degrees C)
    Discharge Temperature -4 to 140 degrees F /15 degrees F (-20 to 60 degrees C /13 degrees C)
    Warranty 24 months

    EcoFlow RIVER Pro Extra Battery Specs

    General Info
    Battery Info

    160W Solar Panel Specifications

    Unfolded Dimensions 26.861.81.0 in (681572.4 cm)
    Folded Dimensions 26.816.51.0 in (68422.4 cm)
    Weight 15.4 lbs (7.0KG) Solar Panel 11 lbs (5.0KG)
    Warranty 12 Months
    Rated Power 160W(/-5W)
    Efficiency 21%-22%
    Connector Type MC4
    Open Circuit Voltage 21.4V(Vmp 18.2V)
    Short Circuit Current 9.6A(Imp 8.8A)
    Cell Type Monocrystalline Silicon
    Operating Storage Temperature -4° F to 185° F (-20° C to 85° C)

    RIVER Pro Power Station

    Product Quantity

    RIVER Pro Extra Battery

    Product Quantity
    RIVER Pro Extra Battery X 1
    Expansion Power Cable X 1
    User Manual X 1

    160W Solar Power

    Product Quantity
    160W Solar Panel x 1
    160W Solar Panel Bag x 1
    160W Solar Panel User Manual x 1

    Shipping Returns

    As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail. If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

    If your order is in stock and we process the charges to your credit card, it will ship within five business day ( most orders are sooner) from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

    We want you to be HAPPY! Please reach out prior to ordering so we can help you make a great purchase decision. We are proud to offer FREE SHIPPING to our customers but if you decide you no longer want your item after it has shipped, you can request a full refund within 24 hrs after placing your order. If you request a cancellation after 24 hrs and before delivery, you will be charged a 25% restocking fee and a transaction fee (2.6% for credit card users, 3.6% for PayPal users, and 2.9% for Shop Pay users) plus shipping for delivery and return. Orders purchased greater than 30 days can not be cancelled.

    Returns are accepted within 30 days of the item being delivered. Return service is only available for US orders. You must be in possession of the order items. Please call us at 980-758-0075 or email to register return and receive an RMA (return merchandise authorization) number and directions for the return. NO RETURNS WILL BE ACCEPTED WITHOUT AN RMA. You may be charged a 25% restocking fee, delivery fee may be deducted from your return, and you may be responsible for shipping your return, based on individual manufacturer policies. Please reach out to us if you have questions prior to purchase.

    When shipping your return

    Product must be in original packaging and include all manuals and accessories Please provide your invoice with the return. Write your unique RMA on your invoice as well as the return shipping label ( MUST be clearly marked on the outside of the package) You must ship within 5 days of receiving your RMA number

    Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery. If your item(s) do arrive damaged, please send photos to along with detailed description.W e will work with the manufacturer to get a replacement sent as soon as possible. If you choose to not accept the replacement you will be responsible for the shipping both ways as well as the restocking fee of 25%. Please note we must be notified within 30 days otherwise you will have to go through the manufacturer’s warranty for replacement.

    Shipping and return policies will vary by manufacturer.

    After your return is received and processed, we will issue your refund within 14 business days, and you will be notified with an email once your order is refunded. If you don’t receive the refund after 14 business days, please contact us at

    EcoFlow Delta Pro Power Station Review

    Recent weather disasters and natural calamities have made the need for emergency power even more apparent these days. While fuel generators have been the go-to solution for such situations, they are no longer viable options in terms of safety and reliability. Portable power generators are popping up left and right but rarely do these devices have enough power to truly run your home in an emergency. That’s where EcoFlow’s new Delta Pro portable power station comes in, stretching what portable means while also expanding what power stations are often expected to do.


    As an important disclaimer, EcoFlow informs us that the review unit they sent us is practically a prototype. While it represents the design of the power station as well as its core functionality, the final retail unit will bear improved build quality and capacities. That said, even this prototype already has us impressed and expecting a great deal from the refined units.

    There’s no getting around the fact that the EcoFlow Delta Pro is huge and heavy, the latter at a whopping 45kg/99lbs. You definitely won’t be carrying this by yourself, but the included handle covers try to at least take the pain away when you need to lift it up together with a friend. The Delta Pro is instead designed to be rolled with an extendable handle that lets you lift up one side to pull it around with the two wheels on its back.

    At first glance, all the standard ports are immediately visible on the front of the Delta Pro, but that belies the versatility of this mobile power station. Flaps on the back reveal the various charging and connectivity options, while two flaps to the right of the front panel hide output ports and an innovative Infinity AC port that we’ll get to later. From the number of ports available to their variety, there is no shortage of ways to power other devices as well as ways to charge the Delta Pro itself.

    The overall design of this latest EcoFlow masterpiece resembles a giant cooler on wheels, one whose body is made of sturdy plastic all around. The top of the power station has a marble-like appearance that we initially mistook for cracks incurred during shipping. Fortunately, it’s a feature, not a bug. The front also sports a color LED screen that provides vital information, like the power being drawn out of or into the Delta Pro, as well as the estimated time remaining before it fully discharges or recharges.

    Battery and Output

    The EcoFlow Delta Pro isn’t exactly a looker, but it isn’t meant to be an art piece anyway. Its real claim to fame is, of course, its large 3600Wh battery that will put many power stations, including those of similar large sizes, to shame. Add to that the fact that you can actually push it to output 4500W of power with X-Boost, and you’re almost set to power your entire home, especially if you have two of these available.

    Those large LiFePo4 batteries, some of the safest and longest-lasting in the consumer market, will be for naught if owners can’t take advantage of all that power. Fortunately, the Delta Pro has plenty of ports to spare, and you can even charge at least two MacBook Pros simultaneously. Right off the bat, you’ve got four USB-A ports, two of which support Fast Charge output, two 100W USB-C ports, four 20A AC outlets, and one 30A AC socket on the front.

    One of the panels to the side, however, provides more options, including an Anderson Port for RVs, a car outlet, typical barrel-type DC ports, and some connectivity options for an optional remote control and Wi-Fi and Bluetooth buttons. The bottom flap houses EcoFlow‘s Infinity Port that can be used for both AC output as well as input from an EV charger.

    The 3.6kWh battery is already plenty to power many household appliances in an emergency, including heavy hitters like hair driers, microwaves, freezers. The Delta Pro uses a pure sine wave inverter that has a high power efficiency, meaning you don’t waste any power that would translate into shorter running times. We were definitely able to confirm EcoFlow’s advertised figures and, as mentioned, even push the output further with X-Boost via the mobile app.

    If that weren’t enough, however, you can connect to Delta Pros for a total of 7200W 30A of power or have two Delta Pro Smart Extra Batteries to one power station for a whopping 10.8kWh. Given the right accessories and setup, you can instantly power the entire house off the grid during an outage and have the peace of mind that you won’t be putting yourself and your family in danger like you would with traditional fuel generators.

    Charging and Input

    Most of the time, the charging narrative of portable power stations is simple and direct. The EcoFlow Delta Pro, however, offers more flexibility and power in that regard but also complicates things a bit. Fortunately, you don’t have to bother with the other charging options and just plug the unit into a wall socket for 1800W (US) or 2900W (EU) of power for two to three hours.

    Portable power stations, however, also try to advertise their eco-friendliness by supporting solar charging options. EcoFlow says that, after an upgrade, the final version of the Delta Pro will be able to support a maximum of 1600W of solar power input at 11-150V 15A. It is no coincidence that the company also has a 400W solar panel that can be chained together to deliver the needed wattage. EcoFlow provided us with one such panel for testing, and we were very impressed by its efficiency, delivering around 256W under a shadow.

    One rather unique innovation in the charging department is the Infinity AC port that actually lets you juice up the Delta Pro from an EV charging station, some of which are even offered for free at certain locations. Again, the final capacity differs slightly from the advertised specs, and the Delta Pro will be able to draw as much as 3400W of power in this mode. That alone is already commendable, but EcoFlow raises the bar by allowing Solar, EV or AC power, and even Smart generators to work simultaneously and deliver up to 6500W of power to charge the unit, provided you have a Delta Pro Extra Smart Battery connected.

    Charing portable power stations via AC isn’t always as simple as it sounds, especially when throwing in other appliances connected to the same line. For users’ peace of mind, EcoFlow throws in a Charge Speed switch so you can control how much it draws. No more accidentally tripping circuit breakers just because you didn’t know what else was connected to that extension cord.

    Smart Home Ecosystem

    The Delta Pro’s LED screen provides the basic information you’ll want at a glance, but it’s pretty much limited when it comes to giving insight into your power usage as well as controlling the power station itself. EcoFlow provides its own mobile app that not only lets you toggle features like X-Boost but also gives more details on your energy usage, including an analysis per port.

    The EcoFlow app lets you remotely manage all the Delta Pros settings, which comes in handy when you’re trying to orchestrate a Smart home system. Together with the optional EcoFlow Smart Home Panel, you can semi-permanently station two Delta Pros, perhaps with an extra battery each, to automatically switch to their emergency power during an outage. You can even set limits and priorities to devices connected to the power station, so you don’t have to worry about manually fiddling with those settings when the time comes.


    The EcoFlow Delta Pro is large, heavy, and, to be honest, a tad pricey, but those are the costs you might be willing to pay for all the flexibility and literal power it offers.

    Its modular system, the plethora of output and input options, and Smart home features truly make it a one-of-a-kind portable power station that doesn’t apologize for its large size. EcoFlow definitely delivers on its promises, which all the more makes that 2,699 Kickstarter price worth every penny.

    EcoFlow River 2 Max review | Best 500W portable power station?

    In the box you get the power station itself, a mains charging cable, a car charging cable, a DC5521 cable and a quick start guide.

    The River 2 Max has a 512Wh LiFePO4 or LFP battery which supports 3000 complete charge cycles compared to the 500 cycles of the River Max’s standard Li-ion battery. This is the smallest unit I’ve reviewed so far that comes with this more desirable battery chemistry.

    It has a clean design but doesn’t feel quite as premium as other EcoFlow units I’ve tested. It’s made mostly from a hard plastic, but there is some movement and flex in some of its component parts. It is lighter than the original River Max though at 6.2kg – even more impressive considering it now has the LFP battery, and I much prefer its more useful flat top even it there’s a missed opportunity for a wireless charging pad or two. You can see its dimensions above, but although a little shorter than the River Max it’s a fair bit deeper, even before taking into consideration its rear carry handle. And it no longer has the removable battery of the original River Max.

    The front of the unit has the now standard EcoFlow LCD screen but with just a single colour white display – not EcoFlow’s typical blue secondary colour.

    Beside the display are 3 bog standard 2.4A USB-A ports – surprisingly none of these ports support any fast charging standards like Qualcomm Quick Charge. But there is a single two way USB-C 100W port both to fast charge your tech and also to charge the unit itself. On the other side of the display is the 12V 10A car charger outlet with a protective rubber flap and 2 3A DC5521 ports.

    Below this UK version has two 500W AC outlets that can surge to 1000W. These outlets are well spaced and can accommodate even oversized plugs. The US version has 4 outlets – two 3 prong grounded and two 2 prong ungrounded outlets.

    Press the power button to turn the unit on which also enables the USB ports. The DC and AC ports have their own power button.

    Around the back of the unit is the mains charging port and the XT60 DC charging port for connecting to a car outlet or solar panels. There’s no flap covering these two ports which is unusual, but then like every power station I’ve tested the River 2 Max doesn’t come with any weatherproof rating, so you’ll need to take care using it outside anyway.


    You can charge the unit with the mains cable, from a car outlet with the supplied car charging cable, via solar with optional solar panels and it supports charging at up to 100W using the two way USB-C port. It’s the first EcoFlow unit I’ve tested with this feature which can be very useful when there’s no mains or solar available.

    Using the supplied standard 10A IEC mains cable – often called a kettle lead in the UK, the unit can charge at up to an impressive 660W. I didn’t quite see 660W, but charging at 600W I charged the unit’s 512Wh battery from completely flat to 80% charge in just over 40 minutes and a full charge took just under 1 hour and 3 minutes. EcoFlow quotes 1 hour for a full charge – so that’s close enough.

    Charging at full speed the cooling fans turn on and are fairly noisy – I measured 46db with a sound level meter one metre away – that was around 10db louder than background noise in my office. But you can configure the charging speed from the full 660W down to 100W in 50W increments in the accompanying EcoFlow app. It will depend on the ambient temperature but generally the fans come on less at lower charging speeds, but they still run at the same speed and aren’t any quieter.

    It is probably a little better for the battery charging at lower speeds, if you’re not in any rush.

    I did check the River 2 Max’s temperatures when fast charging with a Flir thermal imaging camera and the design of the unit and the fans did a good job of keeping it cool as you can see.

    The LCD display on the River 2 Max is bright and clear, and shows information on remaining charge time when it’s charging and remaining run time when it’s powering your devices.

    This estimate is adjusted in real time depending on input or output power. There’s also the battery capacity displayed graphically and as a percentage and icons that illuminate to show which ports are in use. This information is also available in the app which can monitor the power station even away from home on a cellular connection if you connect to the device over Wi-Fi.

    There is also an option to connect directly to the power station over Bluetooth when there’s no Wi-Fi – just tap on “use without Internet” when you’re asked to select your Wi-Fi network. I’ve already covered adjusting AC charging speed under Settings in the app, and will mention other relevant options as I proceed through the review. I’d recommend making sure the firmware is up to date – there’s already been several updates to the firmware just whilst I’ve been testing the power station. The display is very clear indoors but a little harder to see outdoors in bright sunlight.

    The unit charges at just under 100W with the supplied cable via a 12V car outlet. So a full charge would take around 6 hours. You also charge faster if your car has a 24V output, which I confirmed with my bench power supply charging the unit at just under 190W.

    You are limited to 8A as you can see even with the bench supply set at 10A – this is set in the app and can’t be increased, only lowered. You need to manually select Car Recharging in DC mode in the app to get this to work.

    If you manually select Solar Recharging in the app the unit will accept a voltage from 11V to 50V with a maximum or 13A but this can’t exceed 220W so the current starts dropping as the voltage exceeds 17V.

    Like all the power stations I’ve tested the River 2 Max has a built-in MPPT controller for more efficient solar charging.

    I tested solar charging with EcoFlow’s 220W bifacial solar panel which I discussed in my review of the more powerful EcoFlow Delta 2. It’s a good match for the River 2 Max’s maximum 220W solar input although it is quite pricey. But you can use pretty much any solar panel with the River 2 Max.

    It’s winter here in the UK but I did manage to get one day in the last month of testing where the sun came out for enough time to test solar charging. You’ll need a MC4 to XT60 cable which isn’t supplied but is fairly easy to come by. Midday towards the end of January I got a maximum of 190W off the 220W panel which is pretty good. With the generous 11-50V input range of the power station, you could connect two panels in series and easily achieve the 220W maximum input even if you had a couple of smaller panels. As I’ve shown in previous power station reviews, it’s very easy to connect panels in series. These 220W panels are 21.8V – so two in series would be 43.6V which is still comfortably within the maximum 50V input of the River 2 Max.

    Even at 180-190W the River 2 Max could be fully charged in a minimum of 3 hours.

    Finally I tested the USB-C charging using the 100W output from my EcoFlow Delta 2. You do need to make sure you use a 100W rated cable with an E-marker chip, which isn’t supplied. I did get the full 100W, which will fully charge the power station in around 6 hours.


    This UK version has two 500W AC outlets that can surge briefly to 1000W. I confirmed their sine wave output, which is important for sensitive electronics, with a graphical multimeter.

    You can use EcoFlow’s X-Boost technology to continuously power devices rated at up to 1000W by lowering their voltage. So I can run this heater in its low 1000W mode – double the true rated output of the River 2 Max. But the voltage drops from around 240V UK mains voltage to under 170V.

    The heater goes from drawing just over 1000W to just over 500W and this runs continuously, albeit for less than an hour. But at this lower voltage and output it’s barely generating any heat so isn’t particularly useful. X-Boost can be useful, but some devices may be sensitive to their voltage requirements and I’d recommend turning this feature off in the app and only enabling it for certain devices, like those with heating elements, when you’ve no other options. I’d like to see an X-Boost button on the unit itself to easily switch this feature on and off.

    500W is still plenty to charge portable speakers, drones and laptops and run TVs, mini fridges, slow cookers and even some smaller power tools. To test it at its limits I tried running a few handheld power tools. This Festool 310W sander briefly draws over 800W at start-up but still didn’t trip the power station. And this slightly more powerful 400W Festool Rotex sander hovered comfortably around 500W.

    I could just run this Ryobi 750W SDS drill if I ramped it up to full speed slowly, but this Bosch 720W angle grinder without any soft start instantly tripped the power station.

    You should have some idea of what you’re plugging into the power station, but if you do exceed its 500W limit, overload protection kicks in and you’ll need to unplug the device and wait a few seconds before turning the AC subsystem on again.

    The cooling fans will kick in intermittently at the same noise levels as when charging, depending on what you have plugged in.

    It’s worth remembering to turn off the AC when you’re not using it. I measured between a 2-3% drop in capacity per hour just having the AC turned on with nothing plugged in. You can adjust the AC timeout in the app from 30 minutes to 24 hours or you can turn off the timeout completely. But unless you’re topping the unit up with solar you may well come back to an empty power station in a day or two.

    I tested the DC outputs starting with the 12V car outlet which has up to 10A output at 12.6V or 126W, which I confirmed with a load tester. Ramping this up to 12A set off the current overload protection.

    Using the same load tester I confirmed the 3A maximum output of the 12.6V DC5521 ports. You can’t set a timeout for the DC outputs in the app, but even if you leave them on they consume barely any power. These DC outlets are useful for camping accessories amongst other things. All these DC outputs are regulated.

    There are 3 standard 5V 2.4A USB-A ports. It’s surprising these ports don’t support any fast charging standards but I confirmed their rated output with a USB load tester. There’s a far more useful 100W USB-C output.

    The portable jump starter above can charge at the full 100W.

    But more typically it’ll fast charge most laptops that support charging over USB power delivery, like most MacBooks and the Lenovo Chromebook in the photo above.

    There’s no power button for the USB ports – it comes on with the unit which I prefer. And you can set the unit time out in the app to “never” to keep the USB ports on even when supplying tiny amounts of power, just like a mains wall charger.

    The River 2 Max also has a UPS or uninterruptible power supply function. When the power station is charging off mains, any mains devices you plug in will bypass the power station and run directly off mains until there’s a power cut, when they’ll switch across to the power station’s battery. EcoFlow quotes a 30 ms switchover which I found good enough for a desktop computer for example, but they warn against using this feature for data servers that might require 0 ms switching. I’ve used this function before for running a 3D printer. It’s reassuring knowing that even a brief power outage won’t ruin a long print.

    All ports support passthrough charging and can be used whilst the unit is charging. And all the ports can be used simultaneously.

    Finally I measured the usable capacity of the 512Wh built-in battery. I ran two 100W incandescent bulbs at just under 200W until the power station turned off. They ran for 2 hours 19 minutes and consumed 439Wh according to the energy monitoring plug. Power stations like this will always have conversion losses and anything over 80% is pretty good. The EcoFlow works out at 439 Wh / 512 Wh which is around 86% and a good result. I did initially run this test at just under 500W and got 391Wh or just 76% efficiency. So the inverter does lose some efficiency as you run it closer to its maximum output probably due to heat loss.

    I did a similar test using the DC output with a 10A electronic load attached. I measured 431 Wh which is a respectable 84% efficiency. But the DC output is more efficient running something like a camping fridge which turns on and off regularly, since there’ll be very little parasitic draw from the DC subsystem itself.


    I’ve tested several EcoFlow units and they all offer a good feature set and performance at a fair price. At £550 or 500 the River 2 Max is not cheap, but with its LFP battery, super fast charging and 5 year guarantee it should definitely be on your shortlist if you’re after a 500W power station. Whilst you don’t need an app for a power station, remote control and monitoring via the EcoFlow app is surprisingly useful and also makes firmware updates, which often include new features, very easy. I like the USB-C charging option too and the unit is pretty light considering its long-life, usually heavier, LFP battery chemistry.

    The build isn’t quite as good as EcoFlow’s more expensive units or the 1st generation River Max for that matter, and I would have liked all the USB ports to support fast charging.

    The River 2 Max also loses the removable battery option the older River Max had. But that did make the River Max quite heavy even with its standard Li-ion battery and the internal battery still wasn’t replaceable.

    I will be taking a look at the EcoFlow Power Kit soon to add power to my campervan. This system is entirely modular, but a fair bit more expensive. There’ll be a link on screen if that video is already out. I’m looking forward to taking a look at that system, but it’d be nice to see something modular at this price point with replaceable and upgradable batteries and other power station components like the inverter for example.

    I’ ‘ve already reviewed power stations from Jackery, Bluetti and Allpowers that all come with similar outputs. Although those power stations all use standard Li-ion batteries with their associated shorter life.

    I’ve got many more power station reviews in the works, so don’t forget to take a look at my YouTube video at the top of the page, and subscribe to my YouTube channel where I’m releasing videos every week on the latest technology and how to get the most out of it. If you tap the bell icon when you subscribe you’ll get a notification as soon as I release a video, and there’ll be a link to my site here for the written article. YouTube is also the best place to leave a comment. I read all of them and respond to as many as I can!

    Purchase directly from EcoFlow: the above link costs you nothing and helps keep this website and my YouTube channel going – thank you!)

    As an Amazon affiliate, I get a small commission from purchases made via any of the international Amazon links below:

    EcoFlow DELTA Pro Power Station


    Shift In Innovation

    There had been a notable trend among the power station landscape over the past, few years that had perhaps been fueled by climate change, emergency preparation, looming threat of war, and the COVID-19 pandemic. Where manufacturers had focused on putting out “solar generators” — which really are just battery power stations that could be recharged with solar panels — with ever-increasing specifications that outdoor enthusiasts like me had been drooling over, I have been noticing a shift from the outdoors into the home. For instance, market leader Goal Zero has excellent batteries, solar panels, accessories, and integration kits, but many would be hard pressed to know that their products can also power an entire home or RV.

    Goal Zero Yeti 1500x 500x, Jackery Explorer 1000 300

    I have been observing friends and family thinking about having home solar panels installed to reduce their dependence on the local electric utility company, but short of purchasing a large battery from LG or Tesla Powerwall to store excess energy, they would still draw from the electric grid when the sun was not out at night. On the same note, a power outage would ironically also leave a solar-powered home without electricity. Those large LG/Tesla batteries are expensive, can only be installed by professionals, and may need to be replaced every ten years. So, what should you do? I would opt for a portable power station with a home integration kit from Goal Zero. Why? After the initial installation by a qualified electrician, you could modularly replace any end-of-life batteries yourself and even take the main Yeti power station unit camping. Flexibility!

    However, a boondocking friend of mine urged me to look at the high-capacity, modular EcoFlow Delta Pro (LiFePO4) battery. I did. And I was amazed by its feature set. I had also come across Jackery’s sister company, Geneverse (formerly Generark), who has the unique-looking HomePower Two (NCM) aimed at homes. Bluetti also has its EP500 (LiFePO4). All of that helped me realize an expanding market geared towards emergency preparation for the homeowner and/or recreational vehicle (RV) enthusiast. Good! Competition is great! Goal Zero, you have some work cut out for you there!

    Delta Pro: Front, Internal, Back /EcoFlow

    What are the differences? How do they compare to the Jackery Explorer 1000? I am a fan of both Goal Zero and Jackery as both bring their own advantages and disadvantages. Goal Zero and Jackery/Geneverse only had Lithium-ion Nickel Manganese Cobalt (NMC) battery offerings whereas Bluetti, EcoFlow, and BigBlue had Lithium-ion Lithium Iron Phosphate (LiFePO4 / LFP). The latter battery chemistry is less volatile (safer), more usable in extreme temperatures, and has a higher charge cycle count (battery lifetime). I will go over the differences towards the end of this article for those who want to know more.

    LiFePO4 batteries are less volatile (safer), more usable in extreme temperatures, and have a higher charge cycle count (battery lifetime) than NMC.

    I went for the EcoFlow Delta Pro Power Station and their 220W “Bifacial” Solar Panel (Review) for use with our vacation home merely because their feature sets looked so interesting. This two-part review will first go over the Delta Pro Battery and be followed by the 220W Bifacial Solar Panel.

    In A Nutshell

    The EcoFlow Delta Pro packs so many features and nuances, it took a surprisingly long time to summarize my thoughts for this review. It is one HECK of a beast of a power station! Although I was not able to test many of the capabilities due to my limited budget, reading and researching about some of the functions kept me in awe.

    EcoFlow 220W Bifacial Solar, Delta Pro

    Goal Zero had been the gold standard for a long time with its market leading quality, safety record, and philanthropy roots, but the Delta Pro definitely should put the company on notice with an ecosystem that surprisingly surpassed Goal Zero’s in many ways. Offering a 3,600Wh battery capacity that could be expanded to 25,000Wh nearly doubles what Goal Zero could currently offer at 15,671Wh, and its AC inverter leapfrogs Goal Zero’s 2,000W of continuous power and 3,500W surge with double that: 3,600W and 7,200W, respectively. What that translates to is more devices and appliances that can be left running for many more days than homes with the Tesla Powerwall or large LG batteries commonly paired with home solar panels.

    Sweet Spot: The 1000Wh battery capacity hits the sweet spot for many consumers, including this author, who are looking for the right balance of power and portability. But when it comes to home integration, the more Watt-hours a battery ecosystem offers, the longer one can power a home for during a blackout.

    Specifications and numbers aside, the Delta Pro has an impressive set of input (charging) options, including AC wall, EV charger (a first!), solar, DC-producing gas generator, and possibly a wind turbine in the near future. What wowed me was the Rapid charging capability when specific EcoFlow products are combined: 6,500W! Goal Zero’s best only charges at 600W, and two years ago, THAT number dropped my jaw. Charging a Delta Pro and Smart Extra Battery (7,200Wh) at 6,500W would take them from empty to full in less than 2 hours — SUPER impressive! Goal Zero’s 600W would have taken over 10 hours.

    What additionally sets the Delta Pro apart is its Double Voltage Hub that can double the capacity and output of various Delta Pro product combinations. Tack on the Solar Tracker that uses a top-mounted sensor to follow the sun for maximum exposure, a Smart Generator that uses gasoline to produce DC power to directly feed into the Delta Pro, and you have a good support system to maximize battery capacity to run appliances with for longer, if not infinite, time periods.

    A large, colorful display provides information about the battery’s status, and although it is beautiful, it lacks the details that Goal Zero’s higher-end products provide. EcoFlow makes up for that with its gorgeous smartphone app that also tracks historical data to help the owner make a variety of decisions from.

    I really like the telescoping, retractable handle built into the EcoFlow: extend it to one of two lengths to tilt the battery backwards, then pull and roll the 99-pound Delta Pro across the house — at least, that’s the theory. Dragging the heavy battery on uneven grounds (like gravel) or traversing stairs is a huge challenge with the Pro’s small wheels. Did you notice the weight I had just mentioned? Ninety-nine pounds is no joke for the average person to carry up a flight of stairs! Goal Zero’s Roll Cart, on the other hand, with its larger wheels conquer those obstacles and surfaces with much more ease.

    The EcoFlow tries to shed some of its LiFePO4 battery weight and cost by using a mostly plastic exterior. Although the Delta Pro still looks quite nice, Goal Zero’s Yeti X series is housed in a mostly metallic enclosure that helps dissipate heat and is more durable. Metal withstands impact force better than plastic, no doubt about that, but also adds weight. Two distinctive, exterior design philosophies each with their own pros and cons. Delta Pro is physically larger than the higher-capacity Yeti 6000X (6,071Wh), for some reason.

    EcoFlow Delta Pro vs Goal Zero Yeti 6000x

    What surprised me despite all the impressive features of the 3,600Wh Delta Pro, it still costs just a little more than the lower-capacity, 3,032Wh Goal Zero Yeti 3000x. That makes it a great value!

    Overall, it both pains and delights me to see the Delta Pro kicking Goal Zero’s Yeti X line to the curb. On one hand, Goal Zero now painfully looks a bit outdated, and on the other hand, Delta Pro has set a new bar that slaps Goal Zero in the face to wake up and innovate. Competition is always good for the consumer, and so, Goal Zero, what will you do next? EcoFlow has a winning product portfolio on its hands that is difficult to beat.


    As one of Time Magazine’s “Best Inventions of 2021” under the “Sustainability” category, EcoFlow’s Delta Pro power station deservedly turned some heads. It certainly caught my attention with its wide list of features, expansion options, and accessories primarily geared for home use. Market leader, Goal Zero, offers a similar range of products, but EcoFlow does so in a sleeker — and at times more innovative — package. The configuration options gave me some struggles to write about while researching the Delta Pro because there were so MANY, most of which I could not test because it would have cost over 30,400 to collect the entire ecosystem for the “full experience”! Perhaps EcoFlow could sponsor a few items to review someday? (Wink, wink)

    Bear with me! There is a LOT to discuss because of EcoFlow’s vast ecosystem of products. I will attempt to summarize the important ones and how they work with the Delta Pro.

    Delta Max vs Pro: The Max is a smaller, lighter version of the Pro with less capacity at 2,016 Wh, a smaller AC inverter, and no transport wheels.

    Battery Capacity

    The Delta Pro offers 3,600 Watt-hours of battery capacity — how long something can run for — that can be expanded with up to two EcoFlow Smart Extra Batteries (3,600 Wh each) for a combined total of 10,800 Wh simply by connecting them with a pair of cables. That could power a typical home drawing 750-1,000W of power per hour for 10-12 hours. Double that to 21,600 Wh by linking another set of Delta Pro and 2 Extra Batteries via either the EcoFlow Smart Home Panel or the Double Voltage Hub. Finally, this can further be expanded to 25,000 Wh through the use of a Smart Home Panel, 2 Delta Pros, 2 Extra Batteries, and 2 EcoFlow Smart Generators — a gas-powered generator that produces virtually unlimited DC output (as long as gasoline is available) for more efficient charging of the Delta Pro.

    Goal Zero can only store up to 10,871 Wh with a Yeti 6000X and 4 Yeti Tank Expansion Batteries. Let that sink in. The market leader is actually BEHIND in this area.

    EcoFlow’s Smart Home Panel can power up to 10 electrical home circuits during a blackout, the Double Voltage Hub can double the Delta Pro’s capacity with the addition of another unit, and the Smart Generator can provide gas-generated DC power to the Delta Pro for more efficient charging. Furthermore, the generator can directly be controlled by the Delta Pro so it would only be started when needed.

    Power Output

    Another area the Delta Pro shines at is what devices — and how many of them — it can power at the same time. Its AC inverter can operate at a continuous 3,600W of energy and surge up to 7,200W. If those numbers do not make sense to you, do not worry. I will go over Continuous vs Peak (Surge) in more detail later.

    1648W Charging (Overloaded Cord Reel)

    You can throw a number of high-powered devices, like a home air conditioner, refrigerator, TV, laptop, and hair dryer at it with no problem whatsoever as long as their combined power usage does not exceed 3,600W. The Continuous output can be expanded to 4,500W with X-Boost, or 7,200W by combining 2 Delta Pros with either a Smart Home Panel or Double Voltage Hub.

    Goal Zero’s flagship Yeti 6000X can only go 2,000W continuously and peak at 3,500W — numbers that were impressive and unheard of when the product was announced in 2020.

    Note: Delta Pro will shut off its AC inverter if it detects the wall plug getting overloaded when used in pass-through (UPS) mode. Only the battery’s 30A outlet can output 3,600W when disconnected from the AC wall.

    Battery Technology

    Li-ion: LiFePO4 vs NMC

    There had been a lot of debate over whether Nickel Manganese Cobalt (NMC) or Lithium Iron Phosphate (LiFePO4) was better. Both are Lithium-ion batteries. Goal Zero, Jackery, and most of today’s power station manufacturers use NMC, but why do EcoFlow and Bluetti use LiFePO4 when they are bulkier and heavier? There are important distinctions, but the best battery is the one that meets all or most of your unique needs.

    Charge Cycles

    One of the most significant differences — and buying factors — is the charge cycle count for both battery chemistries. It measures how long the battery can be used for before it must be replaced or thrown away. LiFePO4’s count is 1,500-2,000, whereas NMC is 500. However, both have a useful life that can range between 3,000 – 5,000 cycles (even as much as 7,000 with proper care). But how does the count determine longevity?

    Delta Pro: Front, Internal, Back /EcoFlow

    Let’s look at Li-ion NMC as an example. It loses about 20-25% of total capacity after every 500 charge cycle. That means after the first 500 cycles, the battery drops 20% from when it was new, then another 20% after the next 500 cycles, and 20% again after that one. It would take roughly 1,500 charging cycles to have the battery last only half as long as when it was brand-new. Thus, it should be usable for 2,000 cycles or about 6-10 years. Li-ion LiFePO4 can last longer.

    CAUTION: Lithium-ion (LiFePO4 and NMC) batteries do NOT like to remain discharged at 0% for prolonged periods of time. If you let your battery stay at 0% for too long, you may not be able to charge it again without specialized equipment. Keep them at between 20-80% while in storage to maximize their lifetime.

    LiFePO4 Advantages

    • Safer, less volatile, and thus cheaper to manufacture
    • Higher charge cycle: 1500-2000 (10 years). NMC: 500 (6-10 years)
    • Usable in more extreme temperatures (-4F/-20C to 176F/80C). NMC: only 140F/60C max
    • Holds 350-day charge. NMC: 300

    Input (Charging) Options

    Get yourself some popcorn for this. There are over a handful of ways to charge the Delta Pro, one of which provides 6,500W of input and prompted EcoFlow to claim the “World’s Fastest Charging” power station title.

    • AC
    • Wall: 1,800W (120V @ 15A) or 3,000W (240V @ 12.5A)
    • No power brick — 14AWG cord plugs directly from the wall to the battery
    • Never, ever use an extension cord to charge with! It could cause a fire or trip the circuit breaker at best
    • Charge to 100% at level 2 AC EV charging stations (with Type 1 J1772 or Type 2 Mennekes connector types) in 1.7 hours, according to the manufacturer
    ecoflow, delta, power, station
    • Provides up to 10 home circuits with power within 20ms of a blackout
    • Solar (XT60 port): 1,600W (11-150V @ 15A)
    • Uses MPPT that is much more efficient for charging than the older PWM technology
    • Any combination of most solar panel brands and number of panels can be used as long as their combined voltage and current do not exceed 11-150V and 15A
    • Connect up to 3 in series — or 2 sets of 3 (in series) for a total of 6 in parallel. Keep open-circuit voltage at 10-65V

    Smart Extra Battery, Smart Generator, Solar Tracker, Remote Control /EcoFlow

    • EcoFlow Smart Generator (Gas): 1,800W (up to 5,400Wh on a full tank)
    • Generator can be used standalone or with Delta Pro with included Smart Generator Adapter
    • I had asked Goal Zero and Jackery for this option for years!

    Tip: A record-breaking input of 6,500W (!) can be achieved by combining AC Solar Smart Generator charging! (A Smart Extra Battery must be connected to the Delta Pro for this to work.)

    AC Charging Speeds

    The back of the Delta Pro has a toggle for how much power it should draw for charging: Fast or Slow/Custom.

    • Fast: 1,800W (120V @ 15A) or 3,000W (240V @ 12.5A)
    • 0-80% in 2 hours and to 100% after another 45 mins
    • Slow charging is gentler on the battery, prolongs its lifetime, and minimizes risk of tripping the circuit breaker
    • Custom allows the Delta to charge at a configured rate so the wall circuit would not be overloaded. That’s an EXCELLENT feature to have!
    • Example: If an AC Circuit can only handle 1,200W and a coffee maker uses 800W, then the Delta Pro should be configured to charge at no more than 400W (1,200W – 800W)

    Tip: AC charging is prioritized over DC when both are connected simultaneously. Never use an extension cord to charge the Delta Pro with unless it’s a heavy-duty one.

    EcoFlow Delta Pro Carry Handles

    Output Options

    • (4) 20A
    • (1) NEMA 30A for RV hookup (3 prongs = 30A, 4 prongs = 50A)

    If the Delta Pro is used in pass-through UPS (uninterruptible power supply) mode, the internal circuit will turn off its inverter if it detects the AC wall outlet getting overloaded (ie. passing through more than 20A). This means that it could shut off at 1,200W without ever reaching its 3,600W capacity. To use the full 3,600W, disconnect it from the wall and let the battery provide that power.

    Note: Using a battery as a UPS (charging and outputting at the same time) could shorten its lifetime.

    • DC
    • (2) USB-A (12W max, 5V @ 2.4A)
    • (2) USB-A Fast Charge (18W max)
    • (2) USB-C (100W max, 5/9/12/15/20V @ 5A)
    • Could charge two high-powered laptops at the same time
    • A common use for this port is to connect a DC5521-to-Car Cigarette Port adapter so another car freezer, for example, could be connected
    • Anderson Power Pole (APP) port (378W max, 12.6V @ 30A)
    • Vertically configured like Goal Zero’s HPP, but in reverse
    • Connect an EcoFlow Remote Control unit via an Ethernet network cable for monitoring and controlling the Delta Pro from afar. This allows the battery to be tucked away from view

    Portable Air Conditioner

    The EcoFlow Wave is a portable air conditioner that accepts both AC and DC input. The company, of course, recommends using its own Delta power stations for better efficiency and longer runtime because they can draw directly from DC power. In a pinch, any battery or generator capable of providing the Wave-required input wattage could be used, but keep in mind that AC power loses some energy due to conversion to DC.


    • Superfast, configurable charging speeds (200W – 1,800W or up to 6,500W under specific conditions!)
    • Up to 2,000 – 3,000 cycles based on my research (I do not believe EcoFlow’s claim of lasting much longer than 6,500 cycles. Hope they prove me wrong 15-20 years from now!)
    • Much safer and stable than Li-ion NMC
    • Enough to power a typical home for days — or, when used with the EcoFlow (Gas) Smart Generator and/or set of solar panels, virtually forever
    • Pure-Sine Wave AC Inverter
    • Clean power for sensitive electronics
    • Less heat
    • Note: Some manufacturers claim to be Pure-Sine when they are actually Modified or Square Waves

    Wheels, Retractable Carry Handle

    • High-quality BMS (Battery Management System) for safety
    • Provides built-in overload, overcharge (automatic stop when the device is full), and short-circuit protection

    Tip: It is possible to get multiple companies’ products (battery power stations and solar panels) to work with one another once you understand the different connector types, such as Anderson APP, MC4, 8mm, and so on. In one test, I had simultaneously connected solar panels by Goal Zero, Jackery, Suaoki, and Paxcess to the Yeti 1500x’s Anderson port to collect energy from all four! Although I did not test this with the Delta Pro, it should work the same way.

    • Impressive input and output options, including a NEMA 30A for RV hookup
    • Up to 1,600W of solar charging
    • Competition hopefully continues to spur better products from all companies


    • Weight is due to the use of 3,600Wh of LiFePO4 battery cells instead of NMC
    • Comparison: Goal Zero, despite using a more heavy-duty, metallic enclosure, has the Yeti 3000X (3,032Wh) weigh at 70lbs, Yeti 6000X (6,071Wh) at 106 lbs
    • Even bulkier than Goal Zero’s Yeti 6000x (15.3″ x 10.1″ x 17″) that has 67% more battery capacity. Yeti 3000x is 15.3″ x 10.2″ x 13.6″
    • Cable to link Delta Pro with additional Smart Batteries is too short, limiting how and where the batteries can be placed
    • Car Cigarette Port only accepts 96W of input at 12V
    • Goal Zero Yeti X and Jackery Explorer series can take 120W (12V @ 10A)
    • Leads to landfill/environmental waste. Please recycle responsibly!
    • Most companies arrange APP horizontally
    • Can be remediated by buying an APP extension cable, such as those by iGreely, and re-arranging it


    • Without anything plugged in, the AC inverter still draws 7W on its own
    • Or, according to some companies, including Goal Zero, keep it plugged in when not in use and discharge it to 50% every 3-4 months
    • The charging controller automatically gets disabled once the battery is full
    • You may also charge it to 80% for storage, but be sure to discharge to 20% every 3-4 months
    • There is no “memory effect” in this station’s battery
    • Note: It is better to NOT let it completely drain before recharging
    • Could take 1-1.5 years to go from full to empty

    CAUTION: Lithium-ion (LiFePO4 and NMC) batteries do NOT like to remain discharged at 0% for prolonged periods of time. If you let your battery stay at 0% for too long, you may not be able to charge it again without specialized equipment.

    Continuous vs Peak Output

    Goal Zero Yeti 500x: 300W (1,200W Peak)

    It is important to understand the difference between Watts and Watt-Hours. How much power is used or produced is measured in Watts, and how much energy a battery can store is calculated in Watt-Hours. See the “Calculations” section below for more details.

    How much energy a battery can store is measured in Wh (Watt-hours), and how much power is used or produced in W (Watts).

    • AC Inverter: Converts battery (DC) power into AC
    • Delta Pro provides 3,600W continuous output with a 7,200W peak
    • Turns on OK (PEAK under 2,400W):
    • Freezer starts at 400W (peak), runs at 150W once on
    • Coffee maker starts at 1,400W (peak), runs at 800W once on
    • Home AC starts at 4,000W (peak), runs at 1,000W once on

    Most devices power on at a higher (Peak) wattage than when they are already on (Continuous). Therefore, if its peak exceeds the power station’s max, it may not be able to start

    • Continuous Output (Running): Once devices are on, as long as they keep drawing less than 3,600W total, they will stay ON until the battery runs out
    • CONTINUES running (under 3,600W)
    • 100W TV 60W laptop = 160W
    • Temporary overdrawing beyond 3,600W for a few seconds is okay. A quality BMS will protectively shut down the battery if the surge does not end after a while. Regularly going over for a prolonged time can ruin the battery in the long run
    • 300W appliance (500W peak) 1,000W Home AC (4,000W peak) 800W Coffee maker (1,400W peak) 1,200W Miter saw (2,400W peak) 400W appliance = 3,700W. Probably will stay on for a short period
    • Add 1,000W mower (1,400W peak) = 4,700W. Battery will definitely shut down

    Solar Panel – Warning

    EcoFlow 220W Bifacial Solar, Delta Pro

    This power station can be charged with one or more solar panels. There are SOME PRECAUTIONS you must take to minimize battery damage and/or injury to life/property:

    • Never exceed the maximum Voltage (V) or Amperage (A) of the power station’s charging port
    • Delta Pro limits input to 15A [Thank you, Billy Tanglewood and Kevin Lauzon for the clarification]

    Wondering what size solar panel to get? See the “Calculations” section below.

    Calculations – Size Time

    What size battery should you get? How long will it power your fridge for? How long will it take to recharge? The below calculations can help answer those questions and are rough ESTIMATES as conditions, battery quality, and age can vary.

    Time to Charge Battery

    • Calc: Hours to charge battery = Battery capacity (Wh) / Input Wattage
    • Note: As battery approaches 75% full, the input charge will increasingly be slowed down to prevent overcharging

    Charge Time with Solar

    • Calc: Hours to charge battery = Battery capacity (Wh) / (Panel Wattage x [0.5 or 0.75])
    • In a perfect lab environment, solar panels charge at the listed wattage
    • Expect to only receive 50-75% on a good, sunny day (ie. 75W – 113W for a 150W panel), depending on panel’s age, component quality, and weather
    • Keep charging even when overcast as the panels will STILL collect energy
    • Underproduction: If a 200W panel is not making enough (ie. only 50W) due to bad conditions, adding extra ones (ie. two more 200W) can generate a higher, combined output (ie. 50W 110W from the two panels = 160W total)
    • Overproduction: If the panels make more (ie. 400W) than the maximum the power station charge port can take (ie. 120W), only the max (ie. 120W) will go through

    Watts Used/Produced

    • Calc: Watts used or produced by device = Voltage x Amperage
    • Vacuum with 120V @ 9.5A uses 1,140W
    • Solar panel with 12V @ 10A can produce up to 120W

    Ideal Battery Size

    • Calc: Battery capacity (Wh) = Watts used by device x Hours needed for / 0.85
    • 10-15% of power is lost during power conversion

    How much energy a battery can store is measured in Wh (Watt-hours), and how much power is used or produced in W (Watts).

    Time Before Battery is Empty

    • Calc: Hours available for device = Battery capacity (Wh) x 0.85 / Watts used by device
    • 10-15% of power is lost during power conversion

    Time to Charge Device

    • Calc: Hours to charge device = Device’s battery capacity (Wh) / Input Wattage
    • 60W laptop with 200Wh battery: Up to 3.4 hrs (200 Wh / 60W)

    Conversion to mAh

    • Calc: Powerbank-equivalent capacity (mAh) = Battery capacity (Wh) / Voltage x 1000
    • 1 Ah = 1000 mAh

    Tips and Suggestions


    • Always test your devices with the power station before you depend on it on the go
    • Unlike NMC that is volatile, LiFePO4 (which the Delta Pro uses) is one of the safest battery technologies available today. Nonetheless…
    • To minimize fire damage to your belongings or loved ones, store the power station in the garage and not inside the house. Best storage is a dry, cool place
    • You cannot bring a battery of this capacity on a plane
    • Keep the battery out of direct sunlight. I usually store it on the floor of the car and crack open the Windows a tiny bit
    • Do not USE any power station in a tightly enclosed area as it can overheat
    • Do not USE in the car if temperatures fall below or exceed the battery’s rated, operating temperature

    Jump Start Car?

    Genius Boost GB40 in Use /NOCO

    A battery power station like this one cannot be used to jump start a car. Instead, I suggest getting a small, portable one specifically made for that, such as my favorite: NOCO Genius Boost Car Jump Starter (Lithium Battery).

    Use With Other Brands

    Nearly all of the leading power station manufacturers can be used with competing products or accessories — solar panels in particular.

    Yeti 1500x with Goal Zero, Jackery, Paxcess, Suaoki solar panels

    As long as the panels or different Watt-capacities produce the same VOLTAGE, you will be able to safely use them with the EcoFlow Delta Pro. However, be sure to NOT exceed the power station’s rated input Voltage or Amperage! All you would generally need to interconnect is to buy adapter cables that convert from MC4, 8mm, or other connector types to the Delta Pro’s APP port.

    I had previously tested my Goal Zero Yeti 1500x with the company’s own Nomad panel and those by Jackery, Paxcess, and Suaoki. It was a bliss in interconnectivity! What that means is that you can buy lower-priced solar panels that may produce the same capacity as those made by the power station’s manufacturer. You do not always have to buy their own branded products as long as the substitutes stay within the rated limits.

    Final Thoughts

    Delta Pro Package /EcoFlow

    Wow, just wow! I am so glad that my boondocking/RV friends recommended me to check out EcoFlow batteries for our vacation home. The Delta Pro opened my eyes and dropped my jaw a number of times during my research with an impressive set of features, capacities, capabilities, and integration options that rival and surpass industry leaders like Goal Zero, Jackery, and Bluetti! The list was so extensive, it took me far too long to try and collect my thoughts and research for this article.

    The Delta Pro will hopefully kick the competition in the rear, and force them to innovate and surpass EcoFlow’s latest products with their own. Competition is always good for the consumer, and I cannot wait to see what my favorite companies, Goal Zero and Jackery (and sister company, Geneverse), have cooked up in response!


    • EcoFlow 220W Bifacial Solar Panel
    • Goal Zero vs Jackery: Yeti 1000 Core vs 1000X vs Explorer 1000
    • Goal Zero Yeti 1500x / Yeti 1000x / Yeti 500x
    • Jackery Explorer 2000 Pro / Explorer 1000 / Explorer 300
    • BigBlue Cellpowa500 LiFePO4
    • Rockpals 500W / nrgGo 400
    • EcoFlow Delta 2 vs Goal Zero Yeti 1000 (Core, X, Lithium) vs Jackery Explorer 1000
    • Goal Zero Yeti 1000 (Core, X, Lithium) vs Jackery Explorer 1000
    • CES 2023: Jackery LightTent-AIR Inflatable Solar Tent, Solar Generator Explorer 2000 3000 Pro, Air-W, LightCycle-S1, DX Power-Space Pro
    • Goal Zero Yeti 1000 Core (1000c) Launching July 16, 2021!

    Where To Buy

    • Delta Power Stations: Pro / Max / Mini
    • Delta ProSmart Extra Battery
    • Accessories: Double Voltage Hub / EV X-Stream Adapter
    • Solar Tracker
    • MC4 Extension (EcoFlow | Renogy) / EcoFlowMC4 Parallel Split / iGreelyMC4-to-APP / MC4-to-XT60
    • Yeti Power Stations (NMC): 1500x (Goal Zero | Amazon) – See our Review / 3000x (Goal Zero | Amazon) / 6000x (Goal Zero | Amazon)
    • Yeti Tank Expansion Batteries (Goal Zero | Amazon) – See YouTube
    • Home (Goal Zero | Amazon) – See YouTube / Vehicle (454W-750W) (Goal Zero | Amazon)

    Power Station Comparison

    Check it out! Ultimate Reference: Power Station Comparison – We summarized the specifications of many of the power stations we had come across or reviewed all in one place.

    Gas/Propane Generators vs Battery Power Stations

    In July 2020, I wrote about this topic after many asked what their differences were. In short, gas/propane generators can run virtually forever but are loud, dirty, and potentially quite dangerous. Battery power stations, on the other hand, are more portable, silent, less volatile, and can be operated indoor, but depend on external power (like solar) to recharge. Where gas/propane are used to GENERATE electricity, batteries STORE them for later use. Personally, I am a fan of the latter because they are so easy to carry around and are safer to use.

    Who is EcoFlow (EF)?

    EF Delta 2 and Wave (with battery)

    EcoFlow was formed in 2017, ten years after Goal Zero had its start. Four years later saw the launch of the Delta Pro series in 2021 that garnered so much widespread attention, it earned one of Time Magazine’s “Best Inventions of 2021” under the “Sustainability” category.

    A friend of mine once said that Goal Zero is “the best of the best” because of one simple reason: their vast ecosystem. I did not understand at the time what he meant, but as I learned more about the Yeti 1500x, my eyes were opened. Then EcoFlow came along with the Delta Pro that not only matched, but managed to surpass Goal Zero in many ways with its own collection of products.

    ecoflow, delta, power, station

    Battery Technology and Safety

    Goal Zero debuted with Lead-Acid batteries that were bulky and heavy. Today’s devices use Lithium-ion — commonly Nickel Manganese Cobalt (NCM) or Lithium Iron Phosphate (LiFePO4 / LFP) chemistries — for more power in a smaller, lighter package. NMC, however, is more volatile than LiFePO4 and becomes riskier as more cells are packed together. Goal Zero and Jackery use NMC whereas EcoFlow and Bluetti use LiFePO4.

    • How much energy a battery can store is measured in Wh (Watt-hours), and how much power is used or produced in W (Watts)
    • The higher the Watt-hour (Wh) capacity rating, the more dangerous the battery could become if not handled right

    The quality of the battery cells and the BMS (Battery Management System) are crucial for safety.

    Cell Manufacturers

    Portable car freezer powered by Goal Zero Yeti 500x

    Battery cells made by LG and Sony are among the best in the hobbyist world as are Sanyo/Panasonic and Samsung. Goal Zero uses LG. Jackery also uses LG or BAK (a leading Chinese brand). EcoFlow makes its own. During my years of research, I found that use of lower-quality batteries could pose a serious risk to life and property and should become a crucial part in deciding what to buy.


    The second part in a battery’s safe operation depends heavily on the design and BMS (Battery Management System). Some BMS manufacturers, unfortunately, overstate their capabilities that could lead to catastrophic failure.

    • Design should allow for proper, thermal cooling, use quality components, and obtain proper certifications
    • Batteries made by known manufacturers are less likely to fail
    • BMS should sufficiently restrict the battery from going past its capabilities

    Leave a Reply

    Your email address will not be published. Required fields are marked *