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EcoFlow Delta 2 power station review: Flexible, advanced, and LOUD. Ecoflow delta solar charging

EcoFlow Delta 2 power station review: Flexible, advanced, and LOUD. Ecoflow delta solar charging

    EcoFlow Delta 2 power station review: Flexible, advanced, and LOUD

    At a glance

    Our Verdict

    You’d be hard pressed to find a more advanced and expandable portable power station than the EcoFlow Delta 2

    Best Today: EcoFlow Delta 2

    EcoFlow has long been recognized as one of the most technically advanced power station brands around, with one key weakness: battery chemistry. With the Delta 2, EcoFlow addresses that by moving to lithium iron phosphate cells, which more than triples the duty cycle of the battery.

    That’s likely to ease the minds of consumers who expect to heavily use their power stations.

    Note: This review is part of our ongoing roundup of the best portable power stations. Go there to learn about competing products, what to look for in a power station, and buying recommendations.

    ecoflow, delta, power, station

    EcoFlow Delta 2: The lithium iron phosphate difference

    To be honest, arguments over battery chemistry might be a little overstated. With the original 1,000WHr Delta, for example, it would take 800 full discharge cycles before the battery’s capacity would drop to 80 percent. That’s similar to what you would see in a laptop or phone, which you would actually charge and discharge daily or every other day.

    But most people are unlikely to give a portable power station that kind of a workout unless you’re permanently off the grid. Realistically, it’ll sit around until it’s used for a camping trip or occasional power outages.

    ecoflow, delta, power, station

    But going from 800 charge cycles to 3,000 thanks to the lithium iron phosphate chemistry is understandably very attractive to many people. In fact, with that many charges cycles, you might even consider using it as an ad-hoc UPS for your PC, keeping it plugged in full time.

    In truth, that would work with a laptop, but probably not a desktop. That’s because the Delta 2 takes 30 milliseconds to take over once power has been cut. On most desktops following the ATX specification, a PSU can go 16ms before power is lost to the system. The 30ms is simply too slow for most desktop PCs to not immediately reboot with the Delta 2.

    This doesn’t impact laptops, which have a battery to rely on while power is switched over. Similarly, fans, refrigerators, and most other household equipment doesn’t mind losing power for a fraction of a second. There’s no concern about losing data.

    EcoFlow Delta 2: Design and ports

    The Delta 2 doesn’t change much externally from the original model, with handles on both ends that are strong enough to lug around the 27 pound power station one-handed if you need to. EcoFlow has moved the AC and solar charging ports from the side of the unit to the back on the Delta 2. The solar ports continue to be based on the fairly common XT60 connector so you can connect aftermarket solar panels to it if you want. If you go this route, pay careful attention that the voltage of your solar panels remains below the Delta 2’s limit of 500 watts. Or stick with an EcoFlow-branded setup to be sure.

    We tested the Delta 2 with the company’s 220-watt bifacial panels and could push 140 watts to 150 watts from a low-angle fall sun. That was enough to offset our refrigerator’s power consumption of 172 watts, and yes, you can charge the Delta 2 while using it.

    Charging over solar is great, but cloudy days can make charging very tedious and nerve wracking if you’re worried you won’t have time to recharge before the sun sets. If you’re in a pinch during a power outage and can’t wait hours and hours to charge the station via solar panel, the Delta 2 has impressive AC charge rates if you can get it to a working outlet.

    Plugged into AC, the Delta 2 can charge at up to 1,200 watts, which lets you take it from zero to 100 percent in about an an hour and 20 minutes. The Delta 2’s aggressive charge input doesn’t run at 1,200 watts the entire time—like most laptops and phones, it eases back as it approaches full power to preserve battery longevity.

    The XT60 port can also be used for DC charging in your car (that cable is included). You also get a cigarette car lighter and two 5.5mm “barrel” ports. The cigarette charge is rated at 12.6 volts and 10 amps, or 128 watts, while the two barrel charger ports can hit 38 watts a piece at 12.6 volts. You should know that 12.6 volts over the car charger is fine, but some devices may want the full 13.6 to 14 volts a typical car alternator provides to operate. If your device needs that much voltage, the Delta 2’s DC-out may not work for it.

    The Delta’s front features four USB-A ports, and two USB-C ports. We checked the USB-C ports, which report they support USB 3.0 Power Delivery charging at 5 volts, 9 volts, 12 volts, 15 volts, and 20 volts, all at 5 amps. That means both ports can charge a USB-C laptop at up to 100 watts without issue.

    Two of the USB-A ports are the standard 5 watt, while the two blue ports on the right support more advanced charging rates using QuickCharge 2.0 and 3.0 up to 12 volts, as well as Samsung’s AFC up to 9 volts, and Huawei’s FCP up to 9 volts or 18 watts.

    The backside of the Delta 2 features six AC plugs, four are two-prong rated for the standard 15-amp output of a most American homes. The last two plugs are three-prong and rated for 20 amps. The AC output is rated at 1,800 watts total with a momentary surge rating of 2,700 watts. Turn on the Delta 2’s X-Boost mode and it can push 2,200 watts for an extended period of time. EcoFlow says X-Boost is best suited for devices that don’t need exact voltage such as a heater or power tools, and also says you should have only one port for those times. We’d recommend, for example, that you not run a rack of desktop PCs in X-Boost mode due to the lowered voltage EcoFlow uses to reach the sustained higher 2,200 watts.

    We’ve seen reports from early reviews of the pure sine wave on the Delta 2 being a little less than pure under heavy loads but looking at the output under a 1,600 watt load, all appeared fine.

    EcoFlow Delta 2: Performance

    For capacity testing, we fully discharged the Delta 2 twice to condition the battery and then charged it to 100 percent for run-down tests. For that we plugged a watt meter into the AC port and measured the energy output using a 200-watt incandescent light bulb and a small space heater drawing 800 watts. Results for both the 200-watt bulb runs reached 80 percent of the Delta 2’s 1,024Wh-rated capacity. Since the output rates can be different whether you’re discharging over AC or DC, we also ran the Delta 2 down over its USB-C port with load set to 20 volts at 3 amps or 60 watts. That’s the typical maximum charge rate for a small laptop if it were dead. Under actual use, most small laptops can use from 5 watts to 30 watts. The DC output was 828 watt hours, or basically 80 percent of its rated 1,024 capacity.

    Under heavier loads of 800 watts, we saw the capacity drop to 71 percent, however. The lower capacity may be due to the efficiency of the inverter under higher loads, how the battery discharges under a much heavier load as well, and additional power use by the Delta 2 such as its loud fans. We’ll get to the fan noise discussion below.

    With an 81 percent capacity, that means the Delta 2 gives you an actual effective capacity closer to roughly 821 watt hours—not 1,024 watt hours. That’s only slightly behind the 84 percent efficiency of competing brands.

    Fan noise

    We can’t review the Delta 2 without mentioning one of the things that bugs us the most about it: the fan noise. Under high charge rates and high discharge rates, the Delta 2’s two fans spin at very high RPM, which we measured at 57dBA three feet from the unit when the fans were on. Even worse, it’s a small-fan, shrill 57dBA. When charging at the unit’s maximum 1,200 watts, the fans kick on at full speed. It does ramp down at lower charge rates, but even on its lowest setting of 200 watts, it will run the fans and hit about 50dBA.

    Perhaps more annoying than fan noise during charging though is the fan noise during discharge or use. Power stations are supposed to be silent, but when running the Delta 2 at anything above 900 watts, the fans are at full speed. That means, if you’re running the coffee maker on battery, prepare for some fan noise while you’re at it. It’s probably as annoying as some inverter-based gas generators.

    At lower discharge rates, it’s actually not that bad and running a 1990s-era refrigerator, which uses about 172 watts, you can barely hear the Delta 2 over the fridge’s own noise.

    We can actually somewhat excuse the Delta 2 (and any power station’s) fan noise on heavy loads, as keeping the inverter and batteries cool is important for longevity and safety.

    What bugs us is the fans triggering at anything above 120 watts. If you hoped to power medical equipment in your bedroom and it uses more than 120 watts, you’ll have to listen to fans or run an extension cable out of the room.

    The good news is, EcoFlow officials tell us they plan to address the fan noise in an upcoming firmware update to the unit. The company has done so for other models after the initial release, so here’s hoping it will improve.

    EcoFlow Delta 2: App support

    Speaking of firmware updates, we actually had to install two firmware updates to the unit out of the box, which we think is a good sign. It tells us the company is actively supporting the product rather than never, ever issuing updates.

    The Delta 2 now adds support from Android and iOS devices, which the original lacked. The Delta 2 can connect to your Wi-Fi network for monitoring remotely via the internet, or if no Wi-Fi is available, you can directly connect your phone or tablet to the Delta 2 using Wi-Fi Direct. It worked fine for us, but a Bluetooth option in addition to Wi-Fi would be even sweeter, as you wouldn’t have to fiddle with the connection without internet. EcoFlow requires a login, which will annoy some. We’ve also read reports that you have to connect the app to the internet occasionally, which will be irksome to someone truly off the grid.

    In our experience, the EcoFlow app has generally been very reliable and intuitive to use. We did experience some bad calculations as it was trying to figure out real-time run-time estimates but that’s to be expected. Real-time predictions on how many “hours” of battery life are inherently as unreliable as your car trying to tell you how many miles per gallon are left not knowing you’re about to drive up a bit mountain.

    The Eco Flow app lets you tweak charge rates over AC, DC, set when it shuts off, and monitor power discharge and charge rates remotely, as well as set maximum charge and discharge rates.

    EcoFlow Delta 2: Modular expansion

    Perhaps one of the coolest features of the Delta 2 over the older model is the addition of its Extra Battery Port on the right side of the unit. This lets you connect the functional but unimaginatively named Delta 2 Extra Battery to add 1,024Wh of capacity—it’s basically another Delta 2 unit without the AC and DC ports and ups, the total capacity to 2KWh.The even larger 2KWh Delta Max Extra Battery let’s the Delta 2 reach 3KHw.

    What we really appreciate about the modular approach versus one big power station is the weight. Each can be transported separately, and can stack nicely.

    Although we didn’t review it, EcoFlow also makes a “Smart” gas-powered inverter generator that plugs into the same port.

    Should you buy the EcoFlow Delta 2?

    Overall, the Delta 2 gives you class-leading charge rates over AC, decent efficiency, and the ability to easily expand capacity. Moving to lithium iron phosphate is the icing on the cake though, providing much, much longer duty cycles. The 5-year warranty is also a bonus. Our only real ding is the fan noise, but hopefully that will get addressed in an update. At its competitive price of 999 (currently 899 on Amazon), the Delta 2 ranks as one of our top picks for a fairly priced, powerful, advanced power station with tons of expansion.

    EcoFlow DELTA mini Portable Power Station Review

    The EcoFlow DELTA mini is a 1400W Portable Power Station that has the ability to fast-charge with rates up to 900W, as well as charge and supply power at the same time. Paired with up to 300W of solar panels, it can operate demanding loads off grid, or top off quickly from AC power no matter the situation. With an 882Wh battery, the DELTA mini is anything but, putting it into a market segment few can compete against it.

    The EcoFlow DELTA mini is a 1400W Portable Power Station that has the ability to fast-charge with rates up to 900W, as well as charge and supply power at the same time. Paired with up to 300W of solar panels, it can operate demanding loads off grid, or top off quickly from AC power no matter the situation. With an 882Wh battery, the DELTA mini is anything but, putting it into a market segment few can compete against it.

    The Portable Power Station market has seen plenty of entries over the past few years, each looking to cover different segments of the market. These use cases generally include off-grid, emergency backup or camping, all areas where a power outlet is needed but source may not be available. Beyond a large inverter or a big internal battery, many of these units try to set themselves apart from the pack through cost or features. Charging capabilities are a huge differentiator, where AC input is most common, followed by car power and solar.

    EcoFlow DELTA mini

    The EcoFlow DELTA mini is a 1400W Portable Power Station with a battery capacity of 882Wh. It supports peak power draws up to 2100W, and also has an X-boost mode for certain power-hungry devices that are less sensitive to power quality that increases the 1400W capabilities up to 1800W. This puts its power capabilities closer to that of a gas generator than most rechargeable systems on the market.

    Another key aspect of the DELTA mini is its ability to charge at up to 900 watts when connected to AC power, which allows it to fully charge in under 2 hours. This might not seem like much, but some models can take most of a day to charge with much smaller external power supplies. The DELTA mini can also support power while operating, giving it UPS capabilities or keeping devices running while your car or solar panels are adding juice back into the battery. If you are running equipment and low on power, you don’t need to turn things off to charge the battery.

    Out of the box, the EcoFlow DELTA mini comes out as a very slick and fully integrated power solution. It has a very well-made case with a study feel. Minimal plastic creaking when you move it around and it also has integrated rubber pads on the bottom of the case to give it a solid footing. Design can go a long way and EcoFlow really went all out, building the DELTA mini with a premium look and feel.

    The front of the DELTA mini has a bright and easy-to-read display, giving you a concentrated view of the inner workings of the Power Station. Left to right with a quick glance you can view runtime remaining, charge percentage of the battery, incoming and outgoing power usage as well as some other indicators showing you which ports or features are active.

    The continuously updated runtime indicator is very useful, giving you real-time feedback on how loads are affecting the battery. Battery capacity gives you the vital stat of how charged the system is, and then incoming and ongoing power let you track usable and charging capabilities.

    There are only two buttons on the front of the case, a big yellow on/off button as well as an IoT reset button. On and off is pretty obvious, while the IoT button allows you to configure remote access. The DELTA mini has a feature-rich app that really makes it stand out from other models on the market, which we will get into shortly. Finally, the front includes a USB-C port, two USB A ports and a fast-charge USB-A port.

    On the back of the sides of the DELTA mini are fan vents, which are used for the Power Stations’ thermal management. These kick on dynamically during heavier power draws, as well as during the fast charging modes. They quickly spin down as demands decrease, so there are many times when the fans are perfectly silent.

    On the back are the main charging inputs as well as the higher-watt DC outputs. On the top, there is a little pop-up cover to hide the inputs during deployments. Under the cover is a DC jack for car or solar charging, a charge-rate selection switch, an AC input plug and a circuit breaker. With most Power Stations on the market including an external power adapter, the fully integrated power supply is a really nice touch. It makes sense though as many of these power adapters get very warm during charging. The 900W charge mode leverages the internal fans to keep both the battery and that integrated power cool.

    From a port layout, EcoFlow gives the DELTA mini 5 120V AC outlets, four of which have a cutout to allow three-prong devices to operate ungrounded. It also has a covered car power jack and two DC ports. Both AC and DC output segments can be switched on or off separately, while the USB ports on the front are always on.

    EcoFlow DELTA mini App Remote Management

    EcoFlow offers extensive remote management capabilities for their compatible devices, spanning from RIVER and DELTA series Power Stations to Smart Home Panels and Smart Generators. The app provides a centralized way to monitor and control your device, no matter if you are 5 feet from it or miles away. It does that through its own Wi-Fi hotspot or connecting to a known wireless network in range. From that, it interfaces locally or remotely through EcoFlow’s Cloud platform.

    The EcoFlow app is pretty straightforward, with both iOS and Android versions. Once you register an account with EcoFlow you hit a screen allowing you to add in different EcoFlow models you have. Clicking the “” symbol brings you to a screen to add in different models in their portfolio, with instructions then given on how to connect them. For the DELTA mini, you press the IoT reset button on the front of the device and then connect to the EcoFlow Wi-Fi network it stands up. Once connected, you can then interface with the Power Station.

    The remote interface shown for the DELTA mini is very intuitive and continues the trend where EcoFlow put a lot of thought into each design element. The landing page shows the main vitals of the Power Station, with an overlay on top of the model’s rendering showing you the current capacity.

    At the top, you see the operating temperature of the device, estimated runtime and current battery capacity. The next section splits into two parts covering input and output. Output is the default view, showing you a real-time view of the watts consumed across the AC, 12V DC and USB ports on the mini. Both the AC and DC parts can be remotely switched through the app, allowing you to disconnect loads even if you aren’t standing next to it. You can also manually enable X-Boost mode for higher AC loads (although not as compatible with all devices).

    The input side is more basic but focuses on the power supplied by either DC sources (Solar and automotive) or AC. They also give a real-time moving chart of the current incoming or outgoing load, although it starts from scratch if you switch views or exit and re-enter the app view. A historical view would be nice, although honestly, it’s still impressive to have this much monitoring presented from the system regardless.

    The settings area is equally impressive, opening more functionality that will be appreciated by those using the DELTA mini on a more regular basis. For increasing longevity, or just not wanting to deplete the unit out in the field, EcoFlow lets you set the discharge and charge percentage levels. By default, this is 0 to 100%, but you can tighten that up to narrow the charge cycles for increased battery longevity. Bumping up the discharge from 0% also lets you set a built-in reserve.

    Next are the AC and DC charge settings. While the physical switch on the back of the unit lets you change between the default 200W and 900W fast charge modes, if you keep the switch set to the 200W mode, you can adjust the peak charge rate to a custom level inside the app. You can adjust it from 200 to 900W in 100W increments, which is useful if you want to balance loads from the Power Station versus other devices on the circuit. An example might be fast charging multiple DELTA mini’s on the same circuit, without worrying about tripping the breaker. You are also given a similar setting for the car input, which is adjustable from 4A to 8A also in 1A increments.

    The app also gives you traditional customization options like disabling the beeps during mode switching, unit and screen timeout, as well as AC plug timeout. For a remote excursion, you might not want the AC ports staying on if you accidentally forget to switch them off. For a home office UPS use case though you would want to leave the AC ports on always. You can also view and update firmware through the app, which is handy to keep things current in terms of lifecycle management.

    Finally, EcoFlow gives you a Specifications view, which is quite useful. Not everyone memorizes the capabilities of their electrical equipment, so having a reference guide can come in handy. Here you can find all the details for the DELTA mini, and probably similar views for other models in their portfolio. Highlights include the serial number for support, rated capacity, device weight, storage and operating temperature ranges, and all of the input/output ratings. Being able to cross-reference the output capabilities without needing to break out the instruction manual in the field could be invaluable to some.

    EcoFlow DETLA mini Specifications

    • Pure Sine Wave AC Output( ×5): 1400W total (Surge 2100W)
    • Max Device(s) Power Supported by X-Boost: 1800W
    • USB-A Output( ×2): 5V, 2.4A, 12W Max
    • USB-A Fast Charge(×1):5V, 2.4A / 9V, 2A / 12V, 1.5A, 18W Max
    • USB-C Output(×1): 5/9/12/15/20V, 5A, 100W Max
    • Car Power Output(×1): 12.6V, 10A, 126W Max
    • DC5521(×2): 12.6V, 3A
    • AC Charging: 900W
    • Solar Charging: 300W Max, 11-75Vdc, 10A
    • Car Charging: Supports 12V/24V Battery, Default 8A
    • Battery Chemistry: NCM Li-ion
    • Cycle Life: 800 cycles to 80% capacity
    • Shelf Life: 1 year
    • AC Wall Outlet: 1.6 hrs (900W)
    • Car Charger: 9.5hrs (96W)
    • 110W Solar
    • 1 Set: 10-20 hrs
    • 2 Sets: 5-10 hrs
    • 3 Sets: 3.3-6.6 hrs
    • 1 Set: 7.5-15 hrs
    • 2 Sets: 3.7-7.4 hrs
    • 1 Set: 3-6 hrs
    • UL, CE, FCC, RoHS, TELEC

    EcoFlow 220W Bifacial Solar Panel

    EcoFlow also supplied their new 220W Bifacial solar panel with the DELTA mini, which has an interesting element to help drive more flexibility for a Portable Power Station. As the name implies, the design is Bifacial, which in simple terms means it can absorb light from both sides.

    The front side offers 100% of its 220W rating, the rear is rated for 155W. Now, this doesn’t mean you add both sides together for something greater than 220W, instead, the front absorbs the bulk of the power, and the rear when propped up captures some of what is reflected off the ground, a bit of a solar bonus.

    EcoFlow gives some examples of reflectivity of different surfaces and even claims if you set up mirrors behind the panel you can get up to 80% more power than you’d otherwise be able to capture. For real-world conditions most probably won’t be setting up mirrors, but it does go beyond what you’d normally find from a traditional solar panel.

    The manual also states that if the sun is overhead, you will still get the most power from laying the panel flat on the ground. The rear-side absorption is really from different parts of the day where the sun is coming in from steeper angles where you are trying to get every last watt of power into the battery.

    For reference, here’s the energy reflected off common surfaces:

    Both the EcoFlow Solar panel and DELTA mini are compatible with a wide range of other devices, there’s no platform lock-in here. You can connect the DELTA mini to most solar panels with MC4 outputs that fall within the supported voltage ranges and the solar panel has those same universal MC4 connectors that make it work with 3rd party Power Stations.

    During our use with the 220W Bifacial Solar Panel, we saw strong performance even during partly cloudy conditions. With a slightly overcast sky, we saw between 70 and 160W as clouds partially blocked the sun. On a bright day without overhead clouds, those rates jumped to 170-180W. The interesting element was tilting forward the solar panel off the ground though, increasing the power output by 10-20W.

    The strength of the DELTA mini paired with a high-performing solar panel is that you can charge the battery while also supplying power at the same time. During our testing, we leveraged this capability to keep the DELTA mini topped off while also providing power to a smaller 125W load over the AC inverter. The unit operated on a net-positive charge rate, where we were supplying our power and adding to the charge at the same time. Solar is a field with many variables, so actual results can differ. But it’s incredibly useful to keep operations going while charging the portable power station at the same time.

    EcoFlow DELTA mini Field Use

    Having power on tap in any situation is a valuable asset, which is why this Portable Power Station market is growing as fast as it is. The DELTA mini offers 1400W of power (2100W peak) under normal usage giving you a lot of power without compromises. To put this in comparison, most household devices are designed around a 1400-1500W peak limit to fit the 15A breaker size found in most homes and businesses. This puts the DELTA mini in the sweet spot of covering most items that can connect into a common plug, and many bigger draw items that don’t care about power quality when running in X-Boost 1800W mode.

    In an IT setting, having power on hand even for mobile devices is an important role. Many workstation-class notebooks draw power at a fast pace and running off its battery can have limits on CPU and GPU performance. Connecting to a power source for short to intermediate usage can help get the job done faster or keep systems going that would otherwise drain rapidly on internal batteries. Then pile on non-battery-powered accessory devices like networking switches, shared storage devices for collaboration, or even external monitors where an external AC power source becomes a requirement to keep things running.

    One example of the slightly larger DELTA being used in the field is from our resident Digital Imaging Technician, Vince Carnevale. He uses it to get workstations and monitor carts up and running while filming on-location before the electric department can provide generator power. Used in connection with a UPS, the DELTA provides a few hours of runtime, giving DITs and the cinematographer the ability to get to work right away.

    The UPS is still leveraged in this situation since the equipment they are operating has power-loss tolerances less than 30ms, which is the switchover time the DELTA series can react with. The UPS gives the sensitive equipment its needed buffer, while the EcoFlow DELTA offers the bulk power source for the cart. With the fast charge time, once power becomes available the DELTA is able to quickly recover its charge capacity to get ready for the next occurrence.

    In edge IT deployments standing up equipment for initial configuration may mean supplying your own power for a while. Here the DELTA mini can be leveraged to get servers operational for a period of time before you get them wired into their final production environment. We tested the DELTA mini with the 3-node Supermicro Edge IoT server, which had no problem standing it up in our lab.

    In the field you might need to power it up say inside your truck, and confirm settings are correct before finalizing your deployment. The mini wouldn’t be the permanent power source, but instead, one that gives you 30-60 minutes of runtime to perform specific tasks before the final installation.

    Final Thoughts

    In the Portable Power Station market, EcoFlow has shown some serious strength with the DELTA mini and their broader portfolio. It hits all the right buttons, covering a large capacity, powerful inverter, onboard fast charger, and an impressive remote management platform.

    While the mini is the smallest unit in the DELTA series, EcoFlow scales up to a huge ecosystem covering large power stations, solar panels, and associated equipment. For the smaller shop looking to stand up hardware in the field or the media professional getting ready for a shoot, EcoFlow has carved out a niche for themselves with the DELTA series.

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    EcoFlow DELTA Pro Review

    The EcoFlow DELTA Pro is a 3.6kWh Portable Power Station that has the ability to fast-charge with rates up to 3,600W, as well as charge via solar while supplying power to nearly any device that needs it. With the ability to also daisy-chain multiple Delta Pros together, users could get a power capacity of up to 25kWh, which also has the ability to be integrated into your home circuit via an EcoFlow Smart Home Panel.

    The EcoFlow DELTA Pro is a 3.6kWh Portable Power Station that has the ability to fast-charge with rates up to 3,600W, as well as charge via solar while supplying power to nearly any device that needs it. With the ability to also daisy-chain multiple Delta Pros together, users could get a power capacity of up to 25kWh, which also has the ability to be integrated into your home circuit via an EcoFlow Smart Home Panel.

    With an AC output of 3,600W, the DELTA Pro is made for those who are looking to power anything, anywhere, anytime, making it the ideal power station for off-grid living, a home backup for power outages, or even powering a mobile data center.

    The Portable Power Station market has seen plenty of entries over the past few years, each looking to cover different segments of the market. These use cases generally include off-grid, emergency backup, or camping, all areas where a power outlet is needed but source may not be available. Beyond a large inverter or a big internal battery, many of these units try to set themselves apart from the pack through cost or features. Charging capabilities are a huge differentiator when AC input is most common, followed by car power, and lately solar.

    Our review model goes for about 3700 on Amazon.

    EcoFlow Delta Pro

    The EcoFlow DELTA Pro is a 3.6kW portable power station that is able to be expanded all the way up to 25kWh and has a standard battery capacity of 3,600Wh. The DELTA Pro can support peak power draw of up to 4500W with X-Boost technology that is designed to handle those heavy devices such as dryers, AC units, and even more.

    For those that are still concerned that the DELTA Pro can’t handle your device, EcoFlow has assured that 99.99% of devices are supported ranging from home devices and appliances, and outdoor construction devices, to your standard IT equipment and devices.

    One of the best features of the DELTA Pro is the many ways to charge it, meaning the multitude of ways that it is able to receive input power. When dealing with common US-based wall outlets at 1800W, the DELTA Pro is able to be fully charged in just under 3 hours, while with standard EU wall outlets at 2900W, full charge clocks in right under 2 hours, and for those that have access to 3000W rated 240V outlets, the DELTA Pro can be charged in a blazing fast 1.8 hours. The DELTA Pro can also be charged via solar panels, something that isn’t entirely new or exclusive but is always a nice feature to have.

    What makes the DELTA Pro so special however is the ability to charge it via EV charging stations. For those that are taking this on the go and want an even quicker charging experience, you can take it to an EV charging station or use a built-in station at a house. This lets the DELTA Pro reach full charge in about 1.7 hours. Combining all these ways of charging together, you can max the input at 6500W, making it very quick to charge fully.

    Out of the box, the EcoFlow DELTA Pro comes out as an all-in-one portable power station solution for any type of power needs or wants. The DELTA Pro showcases the well-made case with a sturdy feel along with minimal plastic creaking when it is being moved around.

    Since this model is quite large and heavy, instead of the standard pads that other EcoFlows have, the DELTA Pro has a pair of wheels in the rear so that it can be pulled around without having to lift the whole 100lbs of battery off the ground. There are still rubber pads on the front so that it can rest softly on any surface, and when it comes time to pull it around, it comes with a locking, telescoping, luggage-like carrying handle.

    The front of the DELTA Pro has a bright and easy-to-read display, similar to the other models in the portfolio of power stations. The display gives extensive details to the user including the number of days left until it runs out of power, the charge percentage of the battery, incoming and outgoing power usage, and more. There are also two other indicators showing Bluetooth and Wi-Fi so that the DELTA Pro can be managed remotely from a mobile device.

    The continuous runtime indicator is quite handy as it is able to give you real-time feedback on how well the DELTA Pro is handling the devices that are connected and how the load is affecting the battery. The charge percentage gives a quite accurate reading of what is left and can be handy if you need to try to calculate how much power is being drawn over the course of minutes or hours. The incoming and ongoing power is also available for tracking usage and charging capabilities.

    On the DELTA Pro, there are only two buttons on the front of the case, a big yellow button that turns the unit on and off, and another button that controls AC power to the outlets. The on/off port is quite simple, and the AC power on/off allows users to control whether or not there is power delivery to the AC ports.

    On the sides of the DELTA Pro, there are fan vents that are used for the Power Station’s thermal management system. These fans kick on dynamically during heavier power draws as well as during the fast charging modes. The control firmware is also Smart enough to quickly spin down the fans as demands decrease allowing for nearly silent operation when up to and completely turning them off with a low enough load.

    Moving around to the back, there is a little pop-up cover to hide the inputs during deployments. Under the cover are a DC input jack for car or solar charging, a charge-rate selection switch (thank you for making it a physical option, EcoFlow), an AC input plug, and a circuit breaker. Underneath the pop cover, there are two more covers that are two extra battery ports that allow for connections to other devices in the EcoFlow ecosystem, allowing for a battery capacity of up to 25kWh (25,000 Wh).

    All-in-all, there is a ton of connectivity and ports on the EcoFlow DELTA Pro. On the front, there are two USB-A Fast Charge Output ports along with two regular USB-A Output ports. Then there are two USB-C 100W Output ports, a total of four AC Output Sockets (20A), and one 30A AC port.

    On the back, there is a Solar/Car Charging Input, AC Charge Speed Switch, Overload Protection Switch, an X-Stream AC Charging Input Port, and two extra battery ports. Lastly, behind the cover on the side of the DELTA Pro, there is an Anderson Port, car outlet, DC5521 Output port, remote control RJ45 port, an IoT Reset button, pairing button, standby switch, and an Infinity Port.

    LiFePO4 Battery Technology

    One of the most welcome changes to the EcoFlow Delta Pro over the smaller models is the inclusion of newer LiFePO4 battery cells. While the smaller Delta models leverage NCM Lithium batteries, which offer an edge on power density, they don’t offer the same amount of lifetime recharge cycles.

    While a deep dive into battery technology is a bit much for this review, at the end of the day it comes down to how long the unit will last with frequent charge/discharge cycles. The Delta mini with NCM batteries offers 800 charge cycles to 80% capacity, while the Pro supports 3,500 cycles to 80% or a whopping 6,500 cycles to 50%.

    For an average user that breaks out the portable power station during storms or other projects, that might not be a huge deal. For someone that uses the system on a day-to-day basis though, it’s a huge bonus to the offering, and something to keep in mind.

    EcoFlow Delta Pro Specifications

    • Pure Sine Wave AC Output( ×5): 3600W total (Surge 7200W)
    • Max Device(s) Power Supported by X-Boost: 4500W
    • USB-A Output( ×2): 5V, 2.4A, 12W Max per port
    • USB-A Fast Charge(×2): 5V, 2.4A / 9V, 2A / 12V, 1.5A, 18W Max per port
    • USB-C Output(×2): 5/9/12/15/20V, 5A, 100W Max per port
    • Car Power Output(×1): 12.6V, 10A, 126W Max
    • DC5521(×2): 12.6V, 3A, 38W Max per port
    • AC Charging: 1800W Max, 120V~15A, 3000W Max, 240V~12.5A
    • Solar Charging: 1600W Max, 11-150V, 15A Max
    • Car Charging: Support 12V/24V battery, 8A
    • Battery Chemistry: LifePO4
    • Cycle Life: 6,500 cycles to 50% capacity, 3,500 cycles to 80% capacity
    • Shelf Life: 1 year
    • Wi-Fi, Bluetooth, wired
    • 2511.216.4 in/63.528.442cm
    • 2511.216.4 in/63.528.442cm
    • Wall Outlets (US 1800W): 2.7 Hours
    • Wall Outlets (EU 2900W): 1.9 Hours
    • 240V Outlet (3000W): 1.8 Hours
    • EV Charging (3400W): 1.7 Hours
    • AC Solar Smart Generator (6500W):
    • UL, CE, FCC, RoHS, TELEC

    Expanding the Mobile Power Possibilities

    EcoFlow offers a wide range of portable power stations which target a huge range of deployment scenarios. While the Delta Mini we reviewed prior focused on a middle segment of an on-the-go power source, there are limits both in peak power draw and battery capacity with the smaller systems. The Delta line from EcoFlow scales from the Mini with a 1,400W inverter and an 882Wh battery up to the Pro with a 3,600W inverter and 3,600Wh battery.

    There are other differences in terms of charging capabilities and battery chemistry differences, but at the end of the day, the name of the game is putting as much power as possible into a portable power station, without maintaining portability. The Delta Pro aims to hit that size threshold, while at the same time leaving little to nothing behind.

    Similar to our past reviews of portable power stations, our FOCUS really comes down to an IT and enterprise FOCUS in this “large” class of power stations. If a smaller unit can operate a handful of computers and some networking hardware, why can’t something larger support more gear?

    That question was exactly what we set our sights on answering in this review of the EcoFlow Delta Pro; Can we power a portable data center? We filled a Tripp-Lite 14U rack with the usual complement of hardware ranging from a UPS, networking switch, and servers and we are happy to report that the EcoFlow Delta Pro delivered on its promises.

    For most IT hardware, a UPS is still needed as the switch-over times from utility power to battery power transitions are much tighter on a dedicated UPS than on a portable power station. When switching from AC passthrough to battery power, many portable power stations have a small delay in the range of 30ms, which can cause issues with sensitive equipment. For that reason, we utilized a smaller UPS to handle switchover times, while still putting the primary power demands on the portable power station.

    Our deployment idea was geared toward two different scenarios. One is standing up hardware without any external power source, while the other was providing backup power during an extended power outage. Remote deployments can be common for edge solutions, where the goal is to stand up equipment for data/media capture, and once power or storage is depleted, wrap up the project. We touched on this a bit in our Extreme Edge article for Astrophotography, but not all locations will have power available. Another situation could be an extended power outage or equipment transport during operation.

    The EcoFlow Delta Pro is well suited for both situations with its high-capacity battery and very large power inverter. Remote deployments really come down to sizing the battery up against the power demands of the equipment and the required runtime of the project. The EcoFlow Delta Pro offers a 3600Wh battery which we measured to give us 3000Wh of capacity in a discharge scenario of a 350W load. Charging it again fully required 4180Wh. With that figure, the Delta Pro would offer just under 8.6 hours of runtime. You can extend that significantly with add-on battery packs if required.

    The large power inverter also comes in handy for situations where the primary need is keeping as much equipment online as possible, or absorbing significant spikes in load during startup sequences. The Delta Pro is able to absorb spikes as high as 7,200W or maintain continuous loads of 3,600W.

    While compressors or electric motors are obvious power hogs, computer equipment starting up will have significantly higher demands than once it reaches an operating state and idles down. Using the Delta Pro as a buffer between a lower wattage circuit and higher power draw equipment can help balance power needs in a remote setting.

    During use, EcoFlow offers an excellent app to monitor and control their equipment locally or remotely. The EcoFlow App aggregates all of your equipment into one area and gives you a remote view of how things are running as long as you have internet access on both sides. If you are out in the sticks local control is an option. In our use, the app helped out quite often to monitor things and make sure the unit was running as expected.

    ecoflow, delta, power, station

    The EcoFlow App gives you the ability to quickly glance over how things are running and adjust various settings. Usage over time is tracked for output and solar input is also given a similar view. It would be nice to have a wider historical view to tap into or see peak stats to know if you had some device draw a huge amount of power at a certain time.

    Basic operating like turning the AC outlets on and off, and adjusting charging speeds, and charging thresholds are all at your fingertips. You can also manage firmware upgrades through the app as well, which is pretty straightforward when the time comes. Through the settings page, an orange dot is indicated next to the firmware setting and you can click upgrade if you want to kick it off at that time.


    Overall the EcoFlow Delta Pro is a highly versatile professional-grade portable power platform. It offers a unique blend of high output capabilities with a 3.6kW inverter blended with a huge 3.6kWh LiFePO4 battery. The newer battery technology allows it to support thousands of charge cycles for near-constant usage without worrying that you will run down the batteries from wear anytime soon.

    Charging support is probably the most extensive we’ve seen in a portable power station to date, ranging from low-current DC input from a car, to solar and AC charging all the way up to adapters to use public EV chargers. Extended runtime is also folded in with support for additional battery packs and even a matching gas generator.

    The Delta Pro fits in a realm of portable power that is probably the largest unit you could fit on wheels before it becomes too large to move around easily. Sitting in a remote lab or in the field the Delta Pro is up to the task, offering a very nice build and without feeling like anything could get broken being carted around. Obviously, there are limits to its durability, mostly that you can’t leave it exposed to the elements, but it can stand up equipment in areas that are far out of reach of traditional power sources.

    For businesses or individuals that need to operate at the extreme edge or keep equipment running during extended power outages, the EcoFlow Delta Pro is an excellent option.

    Engage with StorageReview

    EcoFlow Delta with 100w 12v Solar Panel Bundle

    Why Choose EcoFlow DELTA?

    The EcoFlow DELTA is built to give you peace of mind. Bring your DELTA power station to any party or into your living room and power up to 13 devices simultaneously. The DELTA 1300 system includes four regular USB ports, two 60-watt USB-C ports plus four wall outlets on the International edition, and six wall outlets on the American edition.

    With the Ecoflow DELTA, you’re prepared for any emergency. It’s safe, easy to use, and gasoline-free. Run fridges, lights, medical devices, and other essentials, all with the flip of a switch.

    A power outage doesn’t have to spell an emergency for families who rely on medical devices, such as a CPAP machine or a medical fridge. With DELTA, you’re always well prepared for the unexpected.

    Why You Need An Ecoflow Delta Battery Powered Generator

    • Lightweight Compact Design- Compared to gasoline generators, battery generators are more compact and lightweight. A lightweight lithium battery pack and solar panel input make this portable solar generator easy to move around.
    • Safely Use indoors. Gasoline generators are loud and emit carbon monoxide, which causes more than 500 deaths annually. During power outages or home recreational activities, you can safely use your Ecoflow DELTA portable power station indoors.
    • Save Time Money. Maintaining a gasoline generator is expensive and time-consuming. typically maintained semi-annually at a cost of 150 per year. Battery-powered generators require no maintenance. Portable solar panels mean harnessing the free power of the sun and leaving fossil fuels in the ground.

    What Can The Delta Ecoflow Power Station Power?

    The Ecoflow Delta power station is powerful enough to run many home appliances and other tools including:

    • Lights (10W) 36 Hours
    • Coffee Maker 50 Cups
    • Large Fridge 20 Hours
    • Circular Saw 1 Hours
    • Laptop 27 Recharges
    • Electric Vehicle 3-5 miles (5-8 km)
    • CPAP Machine 20 Hours
    • Air Conditioning 0.8 Hours

    What’s Included with Your EcoFlow Delta with 100w 12v Solar Panel Bundle Order:

    • 1 x EcoFlow Delta Solar Generator
    • 1 x 100W 12V Monocrystalline Solar Panel
    • 1 x XT60 to MC4 Solar Panel Cable (11 ft. long solar panel cable)
    • 1 x 30 ft Solar Panel Extension Cable
    • 1 x AC Standard Wall Charger
    • 1 x Carrying Case
    • 1 x Car Charger.12V to XT60 cable

    For the past two years, EcoFlow has dedicated precious time and energy to creating the X-Stream Recharge Technology. This technology provides the fastest recharge rate on the market, working 10x times faster than competing brands of battery-powered generators. Lightning-fast charging outputs allow the DELTA to be fully recharged in under two hours using any regular wall outlet.

    Charge Your EcoFlow DELTA in Four Different Ways:

    [Solar Panels]: Use the sun by connecting up to 4x110w solar panels. Charge time will vary according to the sun and the number of panels. With fun sun, recharging can take 4 hours.

    [Any Wall Outlet in Your Home]: Use an AC outlet to recharge in under 4 hours

    [Car Charger]: Use your car charge port to recharge in under 10 hours

    [Gas Generator]: You can use your AC wall charger to connect to a gasoline-powered generator

    EcoFlow Delta Solar Generator Specs:

    • Capacity. 1260Wh (50.4V)
    • Dimension. 15.7 x 8.3 x 10.6in (40 x 21 x 27cm)
    • Net Weight. 30.9 lbs (14kgs)
    • Charge Temperature. 32-113 Degrees F (0-45 Degrees C)
    • Discharge Temperature. 4-113 degrees F (20-43 degrees C)
    • Testing Certifications. UL / CE / FCC / RoHS / PSE
    • Cell Chemistry. Lithium-Ion
    • Cell Type. 18650
    • Shelf Life. 1 Year (after fully charged)
    • Life Span. 800 Cycles (60%)

    EcoFlow Delta Solar Generator Inputs:

    • AC Charge Input Charge: X-Stream 1200W Max AC Charge
    • Solar Charge Input: 400W 10-65V DC 10A max
    • Car Charge Input: 12V/24V DC 10A max

    EcoFlow Delta Solar Generator Outputs:

    • AC Output (x6) Full Pure Sine Wave 1800 Watt (Surge 3300 W) Total = 120V/60Hz
    • USB A Output (x2). 12w per port, 5V DC, 2.4A
    • USB A Fast Charge (x2). 28w per port, 5V DC, 9V DC, 12V DC, 2.4A max
    • USB C Output (x2). 60w per port, 5V DC, 9V DX, 12V DC, 20V DC, 3A max
    • Car Power Output (x1)

    100 Watt 12V Monocrystalline Solar Panel Specs:

    • 12V off-grid solar panel.
    • 0~5W guaranteed positive power output.
    • IP 65 or IP 67 rated.
    • Built with strong tempered glass and an aluminum frame.
    • Certified to withstand challenging environmental conditions.
    • Excellent low-light performance on cloudy days, mornings, and evenings.

    Built-in Components

    • RICH SOLAR 100 Watt Monocrystalline Solar Panel
    • Panel Leads (Pair): 12AWG, 3FT each
    • IP65 Rated waterproof junction box
    • IP67 Rated waterproof solar connectors
    • Maximum Power(Pmax): 100W
    • Maximum Power Voltage(Vmp): 18.2V
    • Maximum Power Current(Imp): 5.49A
    • Open Circuit Voltage(Voc): 22.1V
    • Short Circuit Current(Isc): 5.93A
    • Maximum System Voltage(Vmax): 600V DC
    • Weight: 16.5 lbs
    • Dimensions: 46.7 x 20.1 x 1.4 in

    What Makes the EcoFlow DELTA the Right Generator For You?

    Rigid Structure

    The Ecoflow DELTA was strategically designed to have a low, solid center of gravity, mitigating rollover risk. In addition, it is made with aerospace-grade aluminum and high-strength steel to achieve maximum strength and durability. Rugged as any tool In the shed.

    Patented X STREAM Technology

    The Power Management System converts DC to AC, and AC to DC in the most efficient way. The x stream technology empowers you to charge Ecoflow DELTA 1300 fully in just two hours. It has protective measures in place, which extends the power surge up to 3300W and prevents overload. You can recharge from 0 to 80% within 1 hour.

    Battery Management System

    Inside Ecoflow DELTA 1300, there are 140 lithium-ion battery cells. To extend the performance, life-cycle, and shelf-life, we’ve developed our own proprietary Battery Management System. The Battery Management System regulates all the lithium-ion batteries inside and takes care of the battery’s health individually using AI algorithms.

    Uninterruptible Power Supply (UPS)

    In case of an outage, the UPS feature comes in handy. When Ecoflow DELTA 1300 detects a power failure, it automatically kicks into gear, which allows a computer or any of the most sensitive utilities that you can’t afford to lose to keep running.

    Chainable for Capacity

    Ecoflow DELTA 1300 Power Station can be chained to expand capacity. In order to do so, all of the Ecoflow DELTA units should be fully charged.

    Bright LED Screen

    Displays relevant and useful information such as watt input and output as well as remaining time.

    Replaces Your Old Gas Generator

    With incredible efficiency and power, the Ecoflow Delta 1300 can run most of your home appliances and tools.

    Free shipping on all orders to the Lower 48 !

    As soon as your product is on its way out of warehouse we will email you the tracking number for your shipment.

    Free Shipping on ALL ORDERS

    For more information about Shipping and Returns CLICK HERE

    Price Guarantee

    We care about our customers and want to offer the best available for our top notch products.

    Conditions of our 100% Price Match Guarantee:

    • The item must be purchased from us before we can match it
    • Buy one, get one free offers and Rebates are not eligible
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    • The company must be an Authorized Retailer of the product in question
    • The Price Match Guarantee is based on the final price of the product including shipping and taxes
    • We care about you. We don’t want to just sell you something and never hear from you again, we want to be a part of ALL of your adventures. To do that, we know how important customer satisfaction and providing quality products is.
    • We’re a family owned business! My wife and I run Wild Oak Trail, and when our son and daughter are old enough, they will probably take your calls too.
    • We are passionate about the outdoors, going on adventures, emergency preparedness, off the grid living and so much more. It’s all inspiring! We’d love to hear what you’ve got planned for our products!
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