Review: EcoFlow DELTA 2 Portable Power Station

EcoFlow DELTA 2 Power Station









  • 1800W max output that can be push to 2200W using EcoFlow's app with its X-Boost feature
  • DELTA 2 uses LFP batteries that can last for 3,000 charge cycles and still maintain 80% of its original battery capacity
  • Expandable battery port that lets you expand up 2kWh or 3kWh with the DELTA 2 extra battery or the DELTA Max extra battery


  • Slightly lower 1,024Wh capacity on the DELTA 2 in comparison to the original DELTA
(Last Updated On: June 3, 2023)

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.

We kept the heater plugged in and then plugged in a heat gun to test out the X-Boost feature of the DELTA 2 via the EcoFlow app. So we set the heater to high and the heat gun to high, and about a 2050W output that goes above the standard 1800W output of the DELTA 2. Going into the 2000W range with the DELTA may not be very useful for long runtime and can deplete power within 30 minutes from a full battery. That said, pushing the DELTA 2 beyond its regular 1800W output is amazing if you do find the need for it.

Another appliance we tested was an electric cooktop, and we set a saucepan on top with about four cups of water in it. We set the cooktop high, and the DELTA 2 output was about 900W. The water in the saucepan could boil within about 10 minutes, making it possible to cook during a power outage, something the DELTA 2 is practically made for.

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.

We also tested solar recharging using an AlphaESS SP200 solar panel with the DELTA 2, and it was able to recharge the power station at about 130W to 150W. The max solar input of the DELTA 2 is 500W, so you can use up to a 500W solar panel to recharge the unit; although panels get quite expensive the higher you go on the wattage, just something to know.

EcoFlow has a wide range of panels we recommend checking out, such as their Bifacial 220W solar panels that let you use both sides for better sun exposure and power output.

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.

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
Power Capacity1024Wh
Cell ChemistryLFP (LiFePO4 battery)
Extra BatterySupport one DELTA 2 extra battery or DELTA Max extra battery
Charge Cycle Life3000 cycles to 80+% capacity
AC Output6 outlets, 1800W total (Surge 2700W) | X-Boost: 2200W
USB-A Standard Output x25V/2.4A | 12W Max
USB-A Quick Charge Output x25V/2.4A | 9V/2A | 12V/1.5A 18W Max
USB-C Power Delivery Output x25/9/12/15/20V | 5A, 100W Max
DC5521 Output x212.6V/3A | 38W Max
Cigarette Lighter Port12.6V/10A | 126W Max
AC Recharging1200W
Solar Recharging11-60V/15A | 500W max
Car ChargingSupport 12V/24V battery, 8A
Size15.7 x 8.3 x 11 inches
Weight27 Pounds


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.

EF ECOFLOW Portable Power Station DELTA 2, 1024Wh LiFePO4 (LFP) Battery, Fast Charging, Solar Generator(Solar Panel Optional) for Home Backup Power, Camping & RVs
  • 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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