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I have recently reviewed the EcoFlow DELTA 2 and the EcoFlow RIVER 2 MAX. Both are amazing portable power stations

EcoFlow were kind enough to also send me the top RIVER 2 Pro model. This is an interesting model as it is getting close to the DELTA 2 capacity while being in a more portable form factor.

EcoFlow RIVER 2 MAX vs RIVER 2 Pro vs DELTA 2 Specification

Model NumberEFR610EFR620
Capacity1024Wh (20Ah 12.8V)512Wh (20Ah 25.6V)768Wh (40Ah 19.2V)
AC Output4x 1800W total (surge 2700, 2400W x-boost)2x 500W total (surge 1000W)3x 800W total (surge 1600W)
DC Output2 x 12.6V, 3A, 38W Max2x Car Output (x1):12.6V/10A/3A/3A, 126W Max
DC5521 (x2): 13.6V/3A
3x 12.6V/10A/3A/3A, 126W Max
DC5521 (x2): 13.6V/3A
USB-A Output2 x 5V, 2.4A, 12W Max3x 5V/2.4A, 12W Max per port (total 24W)3x 5V/2.4A, 12W Max per port (total 24W)
USB-C Output2 x 5/9/12/15/20V, 5A, 100W Max1x 5V/9V/12V/15V/20V/5A, 100W Max1x 5V/9V/12V/15V/20V/5A, 100W Max
AC Input1200W220-240V ~ 50Hz/60Hz, 10A Max, 660W220-240V ~ 50Hz/60Hz, 10A Max, 940W
Solar Charge11-60V, 15A, 500W max11-50V/13A, 220W Max11-50V/13A, 220W Max
USB-C Input5V/9V/12V/15V/20V/5A, 100W Max5V/9V/12V/15V/20V/5A, 100W Max
Battery ChemistyLFPLFPLFP
Cycle Life80%+ capacity after 3000 cycles80%+ capacity after 3000 cycles80%+ capacity after 3000 cycles
Weight27 lbs
12 kg
Dimensions15.7 x 8.3 x 11 in
400 x 211 x 281 mm
Warranty5 years
UK Price£549£749
EU Price€ 599€ 799
US Price$449$649

EcoFlow RIVER 2 MAX vs RIVER 2 Pro vs DELTA 2 Size Comparison – Photos

I am currently collecting power stations, so I had the RIVER 2 MAX, Pro, DELTA 2 and the Jackery Explorer 2000 Pro to hand when I took these photos. It gives you some idea of the overall size of each unit.

The main takeaway for me is that the RIVER 2 Pro is well proportioned, it is not much bigger or heavier than the MAX, but you have extra ports, more capacity and higher power output.

As much as I love the DELTA 2, I find it a touch impractical due to its size and weight when you want something a bit more portal.

The Jackery is a different beast altogether. It is portable in that I can pick it up. That’s about it. It is massive and cumbersome to carry around, but it has a massive capacity, and the 2200W output means you can drive many high-powered appliances, such as kettles or air fryers.


When I reviewed the EcoFlow RIVER 2 MAX, I wasn’t able to get it to work with the app properly because it had not been officially launched, but I was with the Pro.

Having an app for a power station may seem unnecessary, and you probably won’t use it much, but there are some handy features.

  • You can view the current input/output for AC/Solar/USB etc
  • The battery percentage and the remaining life are based on current usage
  • You can adjust the charge speed. You’d normally leave it at the max rate, but a slower charge rate will mean the fans spin up less, and it is a bit better for the battery.
  • You can change the card input amps – I assume this will be mainly beneficial for your car.
  • You can switch DC mode from auto to car or solar only.
  • The discharge/charge level is perhaps one of the most useful features.
    • You can set the % you want the power station to stop charging, which can prolong the battery.
    • You can also tell the power station to stop outputting power at a certain level.

For the DELTA 2, there are some differences. That has the X-Boost option, which allows it to power devices that are rated higher than it is capable of.

You then also have the smart generation option. The DELTA 2 is compatible with the petrol-power EcoFlow Smart Generator, and this will start charging the DELTA 2 when the battery hits 20% by default, but the app setting allows you to change this.


One commenter asked about the noise from these units. I don’t normally keep mine in the office, so it has never bothered me that much.

Most/all power stations will have the fans kick in under various conditions.

With the RIVER 2 Pro, when charging at full speed, you get a few minutes of no fans, then it ramps up mid-way and then goes to max.

You can reduce the fan noise by reducing the charge rate.

Similarly, when the power station is in use, it is dependent on the power draw and room temperature. I ran my desktop PC and some lights off from it for a couple of hours. The power draw remained at 200W or under.

After about 30 mins, the fans started to kick in intermittently. They would stay on for about a min, then switch off. They are louder than my PC and audible of my quiet music, but I found that the noise profile wasn’t too bad; they have a low to mid pitch. If anything, I found the intermittent nature of the fans spinning up more annoying than the fan noise itself.

Overall, I have found the noise of the RIVER 2 Pro and Max to be less intrusive than the noise from the DELTA 2.

Solar Charging

I received my unit at the end of October, and it has been consistently overcast and raining up North in the UK.

As I have already reviewed the solar charging of the EcoFlow RIVER 2 MAX, I didn’t test it fully with the Pro as they have the same solar input.

I have previously reviewed the EcoFlow 220W bifacial solar panel and the massive 400W solar panel.

The 220W bifacial solar panel is perfect for this power station. The dual-sided panel allowed me to max out both the solar panel output and the RIVER 2 maximum input. You don’t even need amazing weather, just clear blue skies and direct sunlight.


As for actual usage, there is not much to say in comparison to the RIVER 2 MAX and DELTA 2. In comparison to the smaller RIVER 2 MAX, you have greater capacity and higher maximum output.

At 800W total, there are not many high-powered devices that I can think of that will test this properly. You can buy 800W microwaves and kettles, so if you are living off-grid, this can power some kitchen appliances.

As I said, I have mainly used this for mid-powered devices. I set up my big desktop PC, and it happily ran for a couple of hours. With the new reporting that blackouts may occur this year, this should comfortably power my PC and monitors for 3 hours.

I also used it to set up a small workstation in my kitchen using the GEEKOM Mini IT8 Mini Desktop and Arzopa G1 15.6”, and it works perfectly in this scenario. Saving me from finding a cable reel extension.

Price and Alternative Options

The EcoFlow RIVER 2 Pro costs £750, while the smaller RIVER 2 MAX is £549.

Buy from EcoFlow

EcoFlow DELTA 2 Portable Power Station with 1-3kWh... EcoFlow DELTA 2 Portable Power Station with 1-3kWh... No ratings yet £799.00

The larger DELTA 2 is £1099

Anker has a range of PowerHouse power stations. The Anker 555 is the larger model that is comparable to the DELTA 2 and costs £1099. While the Anker 535 has the same capacity as the RIVER 2 MAX and costs £600.

Jackery has the Explorer 1000 for £1150 or the Explorer 500 for £555. They will also soon have the Pro models out, but only in the form of Solar generators.


I was already impressed with the EcoFlow RIVER 2 MAX, it is a much more convenient size than the DELTA 2, and it is perfect for taking with me in the boot of my car.

The RIVER 2 Pro is much the same, just bigger and more expensive. It represents good value for money compared to the MAX. You get 50% more storage while it only costs 36% more, it is only 27% heavier. The additional plug socket is nice, but more importantly, the higher 800W output with 1600W surge gives you more flexibility in what you can run and how much.

This also seems like a good logical alternative to the DELTA 2. You get 25% less capacity in a package that weighs 35% less and costs 32% less. Of course, the DELTA 2 has lots of other advantages, including the 1800W total output, 2400W X-Boost and the ability to extend its capacity.

EcoFlow RIVER 2 Pro Portable Power Station Review


I am a big fan of both the RIVER 2 MAX and DELTA 2. Inevitably, I also love the RIVER 2 PRO.

Logically, I’d say it is the best of the three due to the features vs size vs capacity. You get a bit better value for your money. However, this will vary depending on the intended usage.

  • Overall - 95%


  • Excellent balance of capacity/weight/price


  • Lacks the advanced features of the DELTA 2, and it is not that much cheaper.

Last update on 2024-04-16 / Affiliate links / Images from Amazon Product Advertising API

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  1. Good review & what is for me the game changer & set the EcoFlows apart from the other brands, are their unrivaled charging times.

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