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Ecoflow Delta Max: Battery-powered generator can get you through most power…

Ecoflow Delta Max: Battery-powered generator can get you through most power…

    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.

    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.

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    Ecoflow Delta Max: Battery-powered generator can get you through most power outages

    With the increase in natural disasters like wildfires and severe hurricanes, having a method to keep power on is becoming an necessity. We look at a surprisingly viable alternative technology to the old-school gasoline-powered generator.

    In addition to hosting the ZDNET Government and ZDNet DIY-IT blogs, David Gewirtz is an author, U.S. policy advisor, and computer scientist.

    • Sigma Xi Research Award in Engineering
    • Kappa Delta Pi, International Honor Society in Education
    • Example of Excellence, Western Governors University Teacher’s College
    • Best Strategy, New Jersey Venture Council
    • Author of The Flexible Enterprise
    • DIY and maker activities, particularly 3D printing and digital fabrication
    • Enterprise-level IT applied to SMB small and home business operations, and working from home
    • Business development and strategy, especially for small business and tech companies
    • B.S. Computer Science with honors, Worcester Polytechnic Institute
    • M.Ed. Learning and Technology, Western Governors University

    In addition to hosting the ZDNET Government and ZDNet DIY-IT blogs, David Gewirtz is an author, U.S. policy advisor, and computer scientist.

    • Sigma Xi Research Award in Engineering
    • Kappa Delta Pi, International Honor Society in Education
    • Example of Excellence, Western Governors University Teacher’s College
    • Best Strategy, New Jersey Venture Council
    • Author of The Flexible Enterprise
    • DIY and maker activities, particularly 3D printing and digital fabrication
    • Enterprise-level IT applied to SMB small and home business operations, and working from home
    • Business development and strategy, especially for small business and tech companies
    • B.S. Computer Science with honors, Worcester Polytechnic Institute
    • M.Ed. Learning and Technology, Western Governors University

    What if you could have an emergency generator that didn’t require gasoline, could be used inside the house without fear of asphyxiation, didn’t make a mess, and was far, far quieter than a traditional gasoline engine? If you live in an area prone to power outages, it could be a game changer.

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    The key is switching from gasoline technology to home battery technology. Yes, there are a few disadvantages to battery technology (like you can’t just fill it back up), but in the main, battery generator technology opens the door to, literally, opening the door and bringing that generator inside your house.

    ecoflow, delta, battery-powered, generator

    As someone who’s lived through multiple week-long power outages in Florida, and a recent set of shorter outages due to wild fires in Oregon, I’m very interested in battery generators as an option.

    While a whole-house integrated gasoline generator is probably the best choice, it’s also gobsmackingly expensive. To install such a thing, you need to have a team of contractors put in a concrete pad, merge the generator into the house’s electrical system, and install a very permanently-mounted generator. Back in Florida, I test-priced such a thing. When I found that the base cost of entry was well above 50,000, I decided it wasn’t something particularly practical.

    But smaller portable gasoline generators are a pain to use. You have to set them up outside, where they become targets for thieves, especially after a long power outage turns neighbors into hostile competitors for scarce resources. You also have to have a way to safely store the gasoline.- and this is an even bigger problem with permanently-mounted generators. Finally, you have to run a very long extension cord from outside to inside (usually through a cracked-open door or window), and then through much of your house. It’s just not fun.

    Ecoflow Delta Max

    Battery-based power station

    When ZDNet’s long-time DIY-IT project partner Wellbots approached me to look at the Ecoflow Delta Max, I jumped at the opportunity. While I haven’t had a power outage in about a year, the possibility is always there.

    I’ve used gasoline generators, but the Ecoflow (and all battery-based generators) require a bit of a mindset shift.

    First, even though it’s a big battery you plug stuff into, it’s not a battery backup or surge suppressor. The difference is that it provides power like a generator, unlike a battery backup unit, which is designed to rapidly switch from wall power to battery power. Also, of course, the amount of battery even the biggest consumer UPSs put out is a tiny fraction of what something like the Ecoflow Delta Max is capable of.

    Let’s talk about that power, and then I’ll circle back to how you should maintain and operate this thing.

    Understanding power

    The Ecoflow Delta Max is a 2016Wh power station. Wh is the abbreviation for watt hour. So, let’s back up a minute. A watt is a unit of power. Power, for those who slept through all those electrical engineering courses, is energy that is produced or consumed. Power is the flow of energy. If it were water, it would be water running in a river or through your pipes. It wouldn’t be water sitting in a glass or a tub.

    So, a watt is a unit of power. We all know the term from incandescent bulbs. A 10W bulb is a lot less bright than a 100W bulb, and that’s because there’s one tenth of the power driving the light. By contrast, a watt hour is a unit of energy. Power is the flow of energy, but it’s the energy itself that does the work. That’s why your electric bill is often measured in kWh, or kilowatt hours. That’s the thousands of watt hours being put to work powering your home and place of work.

    Another way of thinking about it is watt measures the flow, while watt hours measures how much flow you’ve used or can use in a given time. The 2016Wh means that the Ecoflow can handle roughly two kWh.

    A more useful spec, however, is the wattage the device can produce. It can produce 2400W, which means it can power roughly 15 devices at once. A fridge uses somewhere between 100W and 250W, so even with a fridge on the circuit, quite a few devices can be powered.

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    Of course, since this is a battery, the more devices being used, the shorter the available power for those devices. The Ecoflow can interface with solar power, but I wasn’t sent any solar arrays for testing. Without solar to recharge, the Ecoflow has the charge that it has. Once depleted, you’re out of juice. It’s vaguely similar to being out of gas for your generator.

    The Ecoflow does recharge rather rapidly. So if you did have a situation where the power was out, but came back on for a bit, before failing again, the Ecoflow could recharge. It takes less than two hours to recharge using wall power.

    How long does it last?

    That, of course, depends on what you want it to do. If you want it to provide supporting power out in a shed, on a boat, or on a camping trip, it will support most small appliances and tools. You probably could run a table saw on it for an hour or so, but that’s about it. By contrast, if you wanted it to keep your phone topped up, you could charge your phone probably a hundred times.

    This also offers a particularly interesting work-at-home option. Many of us working at home have deadlines to meet and show ups to do, regardless of what our home situation is at the time. I’ve had to meet deadlines while driving through the desert during a hurricane evacuation.

    This unit could definitely power your phone to act as a Wi-Fi hotspot, and then keep your laptop charged up so you can get the job done. Add the ability to brew coffee to keep your brain running, and you have a work-from-home continuity plan.

    You might have some tradeoff decisions. It can keep a full size fridge cold for about 10 hours, a mini fridge cold for a little less than a day, but you might only get an hour or two from a window-shaker air conditioner.

    For an extended outage, you might want to plug in the fridge for an hour, then unplug for an hour, which would extend the service for a longer time. You could use it to cook dinner with an air fryer, but choose something that cooks fast. An hour or so use will deplete the charge. If you use a coffee maker (which uses roughly a thousand watts), make just a few cups and unplug it. It will deplete a coffee maker churning out coffee constantly in about an hour or two (the scenario for this might be where the coffee maker is brought to an event or, say, a scouting weekend where lots of people are filling up).

    According to the U.S. Energy Information Administration, power outages since 2013 averaged about two hours. However, starting in 2018, with increased wildfires and hurricanes, the average outage jumped to about 5.8 hours.

    It’s in these situations where the Ecoflow shines. If you’re concerned about help making it through a typical outage, the Ecoflow could keep your food from spoiling, brew a cup or two of coffee, and recharge your phones. It probably couldn’t keep you cool all night, but it could help make it easier to get through the outage. I, personally, have a bunch of battery-powered fans, and these use so little current that they can make it through most of the night on a set of D-cells.

    If, on the other hand, you live in hurricane country, where you’re likely to be without power for a week or more, the Ecoflow can’t help you on its own. You’ll need to invest in a set of solar panels. I haven’t done any testing of how fast these recharge and what the drain cycle would be. That’s something for a future article, if I ever get panels in to test.

    The best case is if you can connect solar power to the unit to recharge. But even without solar power, this unit could help you get through a typical power outage.

    Maintenance best practices

    Maintaining a gas generator is different than maintaining a battery-based generator. You can’t just leave the Ecoflow out in the shed and add gas and plug things in when the power goes out. You have to keep it charged up so it’s available in case of power failure. And that requires a maintenance practice.

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    I reached out to the company for guidance and they told me that Ecoflow does NOT recommend keeping the unit plugged in, as it may hurt the battery. Instead, it requires a charging-discharging maintenance every 3 months. They recommend you discharge the device to 30%, and then recharge it to 85% every three months. I’m not sure why they want it charged to 85% and not 100%, but that’s their recommendation.

    So, if you truly do want a power station that will get you through most power outages, you’ll need to add the discharge/charge maintenance cycle to your quarterly to-do list. That’s probably not too big a price to pay to have food-loss free power outages.

    Bottom line

    The Ecoflow Delta Max is not cheap. Wellbots sells it for a little over 2,000. For that price, you’re going to want the device to work for you when you need it. That means you’re going to need to do some proactive planning.

    Decide what devices you want it to power during a power outage. Make sure you know where you’re going to deploy it, make sure you have the proper extension cords (best if stored with the unit). Perhaps even conduct a dry run or two to be sure your plans will work. And, of course, conduct the quarterly maintenance we discussed above.

    Finally, there are a few things worth noting about this power station. The Ecoflow Delta Max isn’t the only power station in the Ecoflow line. Wellbots offers units ranging from about 350 and up, but of course the smaller units provide less power.

    Also, I dug around on forums and reviews to get a feel for how customers liked the units and found an interesting set of mixed reviews. Overall, it seems that those who knew what they were getting were very happy with the device, while those who expected more of a magical power source were somewhat disappointed. One particular trend is something that’s easy to be aware of.

    Apparently, the unit doesn’t provide its full power output right after a charge. Charging heats up the unit, so to manage heat, the unit throttles output until it’s cool enough to provide full power. Can you say first law of thermodynamics? Sure. I knew you could.

    So, my bottom line is that this is what it is, and that’s a pretty cool thing. It’s a battery-based power station. If you understand how batteries and power work, and your expectations aren’t that of a mystical, never-ending power source, this is a solid solution. If you want it to offer more, you might want to invest in additional add-on batteries and solar panels.

    What about you? Do you live somewhere where there are regular power outages? Do you have a plan for keeping going? Have you bought a generator? Do you like the idea of a battery-powered generator compared to a gasoline-powered one? Let us know in the Комментарии и мнения владельцев below.

    You can follow my day-to-day project updates on social media. Be sure to follow me on at @DavidGewirtz, on at com/DavidGewirtz, on Instagram at, and on YouTube at

    How to charge the EcoFlow DELTA Pro

    How to charge the EcoFlow DELTA Pro – This is the EcoFlow DELTA Pro ecosystem, a huge expandable capacity a mix of renewable charging solutions, and direct integration with your home. In this article, we’ll take a look at how to charge your delta pro.

    How to charge the EcoFlow DELTA Pro

    DELTA Pro is the first portable power station with flow charge, with it, you get five ways to charge, AC charging, EV charger, solar charging, car charging, and finally using our Smart generator during emergencies. Let’s dive into each method in detail.

    EcoFLow Delta Pro has a huge expandable capacity that you can customize to meet your energy needs. With two Smart Extra Batteries, you can increase your capacity to a whopping 10.8kWh.

    AC outlet

    If you’re charging your delta pro via an AC outlet, you have two options: a wall outlet, or for the first time ever an EV charger. Both benefit from extreme the world’s fast-charging power station technology. If you opt for a wall outlet, you can use any standard AC wall outlet, and benefit from speeds of 1800 watt charging. On the back of delta pro, you’ll find a speed switch.

    This allows you to customize your AC charging speed which is determined in the EcoFlow app set to the up position for fast charging, and the down position for your custom setting.

    EV Charger

    If you’re using an EV charger on the go, or at home, you can benefit from fast charging speed to charge at an EV charger. You’ll need an EV X-Stream adapter. If you’re going renewable with your Delta Pro, you can use EcoFlow solar panels to charge your unit. Delta Pro can handle up to 1200 watts with 3 x 400 watts panels.

    Solar Panels Charger

    Here’s how to connect multiple panels. First connect a series of panels using the MC4 connectors then take the loose ends that are not yet connected, and link them with the solar charging cable. Once done, you can plug the solar charging cable directly into your unit. Use EcoFlow solar panels in direct sunlight, and make sure they are unobstructed.

    The carrying case allows you to position the solar panels for maximum solar efficiency. They can also be used with the solar tracker.

    Car Charger

    You can also use the outlet in your car to charge Delta Pro. To start charging, start up your car engine, and take your car charging cable, and plug it into the car charging port on your Delta Pro then take the other end of the cable and plug it directly into your car cigarette lighter.

    Smart Generator Charger

    In extreme cases, you can use the Smart generator for backup power. To set up your Smart generator, turn the fuel cap vent lever and engine switch to the ON position then connect it to your delta pro via the extra battery port. Once set up, your Smart generator will auto-detect if your unit is below 20 charges.

    If the battery level drops, the engine will start and charge your unit to full automatically. You can alter the battery level at which the Smart generator turns ON in the EcoFlow app. You can also start charging the Delta Pro right away by pressing and holding the electric start button remotely from the EcoFlow app or manually with the starter grip that covers the main ways to charge your Delta Pro.

    Review: EcoFlow DELTA 2 Portable Power Station

    Improvements in portable power stations have been pretty drastic recently, with various capacities and output capabilities. You don’t have to settle for a single power station because many can fit your budget and powering needs. Also, at this point, power stations are now using LFP batteries, which means Lithium Iron Phosphate, which can give many more charge cycles, ultimately making it much more worth purchasing a power station.

    In this review, we’re looking at this EcoFlow DELTA 2 power station. This is a successor to the original DELTA from EcoFlow, but this one has a few upgrades; one of the most notable being that the DELTA 2 uses LFP batteries that will give it a longer life. Let’s take a closer look at what else this power station features and why this may be the only power station you’ll need for the foreseeable future.

    Power Capacity

    So the DELTA 2 has a 1,024Wh capacity, slightly lower than the original DELTA, which has a capacity of 1,260Wh. Is this that big of a deal? No, we don’t think so because remember that DELTA 2 uses LFP batteries. This battery has 3,000 charge cycles, and even after that many charge cycles, you can still retain 80% or more of its original capacity.

    On the other hand, the original DELTA uses Lithium-Ion batteries, and after just 500 charge cycles, it will have 80% or possibly more of its actual capacity. The use of LFP batteries is far more critical than the slightly lower capacity on the DELTA 2. You’ll ultimately get similar usage times with either version of the power station when it comes to charging devices or powering appliances.

    When charging devices such as phones using this DELTA 2, you can charge most phones to full power about a hundred times. Charging tablets or laptops with similarly large batteries will be able to charge to their full power twenty times from the EcoFlow DELTA 2. Overall, charging devices with a power station is no different here, and if all you’re using is charging devices from this unit, then you’re looking at practically weeks of reliability.

    Powering appliances with DELTA 2 is excellent because of the unit’s high output, but we have to say that the 1,024Wh capacity is somewhat of a mismatch. Usually, power stations have a matching capacity and output, but that’s not the case here. If you power a 1,000W appliance, you can use the power station for 1 hour, while using a 1W appliance will have this power station last 1,024 hours.

    Since the DELTA 2 has a 1800W max continuous output, if you were to power a 1800W appliance, you’d be able to use the DELTA 2 continuously for about 40 minutes. With the X-Boost feature activated, you can use up to 2200W, and an appliance using 2200W will last about 25 minutes.

    Yes, it can sound limiting, but even if you’re using high-wattage power tools that are being used intermittently, you can still use this power station for a decent amount of time. To consider how fast the battery can drain with a high-wattage appliance, we plugged a deep fryer into the DELTA 2, set it to 350 degrees, and turned it on. The battery was at 100%, and the fryer pulled 1754W. Once the fryer hit an oil temperature of 350 degrees, it turned off, and the battery was at 47%, which took 11 minutes.

    EcoFlow has considered the battery capacity of the DELTA 2, which is why a new feature they added is the ability to connect an extra battery to the DELTA 2 power station. You choose between the DELTA 2 Extra Battery which can give you a total of 2kWh (2048Wh) extra battery power, or the DELTA Max battery, which will give you a larger 3kWh (3040Wh) capacity that can be connected to the port off to the side of the DELTA 2 power station.

    Output Charging

    The output options and their power are not lacking; the EcoFlow DELTA 2 delivers excellent power with each section. The sections on this unit include the USB ports, the DC ports, and the AC Outlets.

    Charging Ports

    The charging port section has two USB-C Power Delivery ports, two USB-A Quick Charge ports, and two standard USB-A ports. The two USB-A Quick Charge ports have an 18W output, and the two standard USB-A ports each have a 12W output.

    The two USB-A Power Delivery ports each have a 100W output. Charging power is top tier from the DELTA 2, easily one of the best charging port setups we’ve seen. Power stations from other brands tend almost always to have USB-C PD ports lower than 100W, and some don’t even have Quick Charge ports, the inclusion of not one but two USB-C PD ports makes us feel like we’re dealing with a premium brand.

    In our case, we tested all the ports by charging from each simultaneously. We plugged an LG G7 and a Galaxy A51 into the USB-A Quick Charge ports, and both phones could fast charge. We plugged in a Galaxy S6 and a Google Pixel to the standard 12W USB-A ports, and the Galaxy S6 was standard Charging, while the Pixel was somehow able to rapidly charge despite charging from a standard port.

    We charged a Galaxy Note 9 from one of the USB-C ports and a Lenovo Flex 5 from the other USB-C port; the Note 9 was able to fast charge, and the Lenovo laptop was able to charge at its max speed. So, just a quick overview, four phones could fast charge, and a laptop could fast charge simultaneously, resulting in an output of about 65W to 70W.

    You can easily charge two USB-C chargeable laptops if needed because a 100W PD output can charge nearly all USB-C laptops. The Charging from the DELTA 2 is an absolute win.

    DC Ports

    The DC section includes two DC 5521 ports and one cigarette lighter port. This will likely be the least used section on this power station, just as with other power stations, simply because most consumers don’t have appliances or devices that are charged or powered from these ports. You can still find a use for them, as we did. We used a portable tire pump with a cigarette lighter port.

    AC Outlets

    There are six AC outlets on the DELTA 2 power station, four of which are two-prong outlets and two three-prong outlets. As mentioned in the power capacity section, this power station has a 1800W continuous Pure Sine Wave output, which can be raised to 2200W using the X-Boost feature in the EcoFlow app for Android and iOS devices.

    You can power most appliances using the DELTA 2, which is a surprise because battery capacity and output usually match a power station. That’s not the case here, which is why you do have to know what type of runtime you’re getting.

    As we mentioned, the first appliance we tried with the DELTA 2 power station was a deep fryer that we set to 350 degrees. While heating up, the deep fryer pulled about 1755W from the power station, an insanely high output at the cusp of the 1800W max output of the DELTA 2. The deep fryer ran without any problems and reached the set 350-degree temperature.

    We then plugged a Lasko heater into the power station, set it to low first, and used 800W; we then set the heater to high, and the power station was outputting 1400W. In both settings, the heater ran great, and the ability to power a heater is incredible for those fall and winter months.

    That said, It’s best to stick to a low setting for heaters when using this DELTA 2 power station because even though it’s capable of powering the heater at high, doing so will make the power station only last about 40 minutes. When we ran the Lasko heater on low, the runtime would be about 1 hour and 20 minutes.

    Preview Product Price
    EF ECOFLOW Portable Power Station DELTA 2, 1024Wh LiFePO4 (LFP) Battery, Fast Charging, Solar. 899.00 Buy on Amazon

    Recharging the DELTA 2 Power Station

    Recharging the EcoFlow DELTA 2 is just as good as the output, mainly because of the AC recharging speed, which is 1200W. This power station doesn’t use a charging brick; instead, you get an AC charging cable in the box that plugs into the wall, and the other end connects directly to the power station’s AC input. With a 1200W input, this unit can recharge from 0% to 80% in about 50 minutes. This incredible recharge speed is becoming the norm among power stations as you can get back to using your power station much faster.

    The 1200W recharge rate may cause some concern regarding its effect on the battery. Still, because the DELTA 2 uses an LFP battery that is less volatile, charge cycles are not nearly as affected as Lithium-Ion batteries.

    Also, suppose you are concerned about the 1200W input. In that case, you can use the EcoFlow app to adjust the recharge speed to 200W, and this feature can also be useful to quiet down the fan because the internal fan of the DELTA 2 is pretty loud when the unit is recharging at 1200W.

    Preview Product Price
    EF ECOFLOW Portable Power Station DELTA 2, 1024Wh LiFePO4 (LFP) Battery, Fast Charging, Solar. 899.00 Buy on Amazon

    Size and Weight

    Considering the output and the capacity, the Ecoflow DELTA 2 is on the smaller and lightweight side. The 1024Wh capacity contributes to easier portability, allowing the unit to have a length of 15.7 inches, a width of 8.3 inches, and a height of 11 inches. The weight of the power station is 27 pounds.

    With the two large handles on either side of the unit, moving around the DELTA 2 is straightforward. Not having to deal with a foldable handle is a relief because those tend to feel awkward holding and carrying around a heavy load. You can easily store this in your house in an emergency or place it in your car during a road trip.

    Functional Components

    If you’re already familiar with Ecoflow DELTA power stations, you’ll be familiar with using this unit. If not, then no problem because it’s still easy to use. The main power button is on the side with the display, and you have to hold the button down for the power station to turn on.

    You’ll hear a “beep” sound when the unit turns on, and the display will turn on. The display on this DELTA 2 power station is one of the best on the market; the screen shows the real-time input and output wattage. The battery capacity percentage is in the middle of the screen, and off to the left-most side is the estimated runtime that fluctuates depending on the unit’s output.

    The display is bright, easy to read with large numbers and letters, and in a way, it feels snappier than other power stations we’ve tested. It has everything you could ask for without being too complicated and providing helpful info second by second.

    Each section has its power button and once turned on, the button has a white light that turns on to show that the section is being powered. On one, you have the USB section and the display; on the other, you’ll find the AC outlets, DC ports, and input ports.

    Off to the side of the DELTA 2 is where you can find the battery expansion port that you can use to plug in an extra battery.

    Structure and Material

    The build quality of the DELTA 2 is the same as EcoFlow’s other power stations; the unit has a solid build with nothing loose or flimsy. The handles are especially strong, and you can hold onto just one handle, and even then, there are no signs of structural weakness within this power station.

    Of course, like with most power stations, the build may be strong, but you should not drop it or expose it to water. Both water exposure and dropping the unit may damage it.


    The unit will automatically turn off when powering appliances over the 1800W max output for the DELTA 2. However, if X-Boost is turned on via the EcoFlow app, the max output is bumped to 2200W, so anything above 2200W will automatically turn off the power station.

    Internal fans change speed depending on the wattage output and input of the power station; for example, the fans run at their max speed when the DELTA 2 is recharging because of the 1200W input.


    For the price, wattage output, battery capacity, and the new LFP battery type, the EcoFlow DELTA 2 may be the most reliable power station on the market. The only unreliable part is the 1,024Wh battery capacity which can be a letdown for running higher-wattage appliances because if you’re using a 1000W appliance with this power station, the runtime will be an hour or less.

    On the bright side, the LFP batteries ensure that you can rely on this power station for 3,000 plus charge cycles; this is much more than regular Lithium-Ion batteries can offer, making purchasing a power station much more worth it. There is no shortage of fast charging ports or AC outlets on the DELTA 2.

    The size and weight are as portable as it gets with its capacity and output, making it easy to move around when needed, and it is small enough for easy storage in your home when you need it in an emergency.


    The EcoFlow DELTA 2 is a slight but, at the same time, much-needed upgrade. The capacity falls short at 1,024Wh, which can be limited when you want to run high-wattage appliances for a long duration. The good thing is that the DELTA 2 uses LFP batteries that have a much longer lifetime, which is imperative when dropping some serious cash on a power station. The feature of expanding battery size can be very useful.

    ecoflow, delta, battery-powered, generator

    The 1800W and all the ways you can use the power station are enough for nearly all consumers.

    Using the DELTA 2 power station is simple to use with just a press of a few power buttons, and the screen gives you easy to reads stats such as output, input, and estimated runtime, and it shows you what sections are powered on and being used. The addition of the EcoFlow app is another edge that EcoFlow power stations have over the competition because it lets you control the unit’s functions remotely and access features that practically unlock more power from the DELTA 2.

    The build of the DELTA 2 is strong, and everything holds solid. You can even hold one of the handles freely even though it may feel wrong; the power station will be fine. The internal fans do an excellent job keeping the unit cool and changing speed depending on the output and input wattage.

    It would be best if you didn’t expose the power station to water or drop it, though, as both can damage it.

    Being able to power nearly any appliances you want at this price is excellent, and the LFP batteries make it so that you can rely on that power station for much longer. The sacrifice is the relatively low battery capacity that can be remedied with an extra battery that you can connect to the side of the DELTA 2, a new feature of the DELTA 2 power station.

    EcoFlow DELTA 2 Portable Power Station Specs


    If you’re searching for a high capacity, a high-wattage power station with plenty of charging ports and outlets, and you’re alright with dropping at least 1,000, then the Ecoflow DELTA 2 power station is the one you need. Honestly, even if your budget is 500, we urge you to consider the DELTA 2 because of all its functions, the Ecoflow app compatibility, and the use of LFP batteries; the DELTA 2, in many ways, is priced too low. We recommend it on all fronts.

    • 7 X Faster Charging. 0-80% in just 50 mins and 0-100% in 80 mins with AC input. That’s ideal when you need home backup power and a quick charge using your wall outlet.
    • Expandable Capacity from 1-3kWh. With the standalone portable power station sporting 1kWh, you can add on extra batteries to reach up to 3kWh. Ideal for camping, RVs or off-grid living.and a quick charge using your wall outlet.
    • Power Almost Anything. Portable batteries have come a long way. Power all your appliances with 1800W output, that’s on par with outdoor generators without the fumes or noise. With 15 outlets and its huge output, you can power 90% of your appliances.
    • Clean, Green Charging. With up to 500W of solar panel input, DELTA 2 is a solar generator that can be charged while camping, on an RV trip or off-grid.
    • Built to Last 6x Longer. Its LFP(LiFePO4) battery chemistry makes for a portable power station with a 3000 cycle life. Enough for years on end of use. With a sophisticated BMS, you can go easy knowing its auto-regulating to keep you safe.

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