EcoFlow Delta 2 Max Review: High capacity output


With its excessive capacity (expandable to over 6kWh) and a most energy output of 3100W, the EcoFlow Delta 2 Max can energy nearly each UK equipment. With quick charging, the flexibility to mix photo voltaic and AC, and sensible power management that allows you to steadiness the 2 sources, this energy station is quick and environment friendly to cost. It’s somewhat fiddly to hold round, however its wonderful vary of outputs and excessive effectivity make it a terrific selection for those who want a whole lot of energy on the go.


  • As much as 3100Wh energy output
  • Expandable
  • Very environment friendly

  • CapacityThe primary unit has a 2048Wh battery, and as much as two further 2048Wh batteries could be added.

  • Energy outputThe 4 UK energy shops help a most energy output of 2400W in customary mode and 3100W when X-Increase is turned on, which means that just about all home equipment could be powered by this system.


With a 2048Wh battery, 4 UK energy shops, a most energy output of 3100W, and a hefty 23kg weight, the EcoFlow Delta 2 Max is on the restrict of portability.

Constructed for many who want the utmost quantity of energy on the go, this can be a well-featured and long-lasting battery system.

Design and options

  • 4 AC shops
  • 2400W energy output (3100W with X-Increase)
  • Good app management

Whereas the EcoFlow Delta 2 Max isn’t a lot greater than the EcoFlow Delta 2, it’s significantly heavier at 23kg vs 12kg. That’s as a result of the Max has a a lot greater 2048Wh battery inside, which implies that it could possibly retailer between 1 / 4 and a fifth of the common UK house’s power utilization. That mentioned, the EcoFlow Delta 2 Max doubles the storage capacity, however doesn’t double the burden, which is spectacular.

As with different EcoFlow batteries that I’ve reviewed, the Delta 2 Max has carry handles on both facet of its physique, so you’ll be able to carry it with two fingers. I barely want the lift-up deal with that Jackery offers on its energy stations, such because the Explorer Explorer 1000 Plus.

The EcoFlow Delta 2 Max is well-provisioned. On the facet with the LCD and most important energy button, there are the USB outputs: two 100W USB-C ports are nice for contemporary laptops, plus there are two customary USB ports (12W per port) and two fast-charge ports (18W max).

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Spin the system round and on the other facet are the ability inputs, the 4 UK energy shops, and the DC shops. UK energy sockets could be annoying because of their measurement, however EcoFlow has aligned these properly, so it’s best to have the ability to use all 4 of them with out a plugged-in adaptor inflicting an obstruction.

EcoFlow Delta 2 Max UK power plugsEcoFlow Delta 2 Max UK power plugs
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Within the default mode, the ability sockets help a mixed output of 2400W, with a surge ranking of 4800W. Activate X-Increase, and the ability output jumps to 3100W, which is greater than a regular family plug offers. X-Increase received’t work with all units, notably those who have strict voltage necessities or voltage safety.

In impact, which means which you can energy any single UK system, together with a kettle; extra realistically, you’ll discover which you can energy a number of high-power units without delay, giving this energy station an enormous quantity of flexibility.

It may be used as an Emergency Energy Provide (EPS), feeding mains energy by to its energy sockets; within the occasion of an influence reduce, the battery kicks in and takes over inside 30ms. For units reliant on quicker switchover occasions, equivalent to servers and a few medical units, that’s too lengthy; for normal family units, that’s not an issue.

Whereas a giant energy output is beneficial, utilizing high-power units will drain the battery quick. In the event you do want extra energy, then the EcoFlow Delta 2 Max helps as much as two further EcoFlow Delta 2 Max Good Batteries, every including 2048Wh of energy; that’s a complete of 6144Wh of energy.

EcoFlow Delta 2 Max battery expansion portEcoFlow Delta 2 Max battery expansion port
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Through the display on the entrance, you’ll be able to see the present cost standing (and any enter energy), plus the present drain and the battery life remaining in minutes and hours.

EcoFlow Delta 2 Max screenEcoFlow Delta 2 Max screen
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Controllable through Bluetooth or Wi-Fi, the EcoFlow Delta 2 Max is appropriate with the EcoFlow smartphone app. This offers distant management over the shops, and sees the identical data that the bodily LCD exhibits.

Through the app, you can too management X-Increase, the AC charging velocity (it’s 2400W by default, however you could wish to scale back this when you’re on a low-power circuit), and the cost/discharge restrict (lowering these can enhance battery life when you’re prepared to sacrifice accessible capacity).

EcoFlow Delta 2 Max appEcoFlow Delta 2 Max app
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Charging and photo voltaic

  • Cost to 80% in as little as 43 minutes
  • As much as 1000W of solar energy

For mains charging alone, the EcoFlow Delta 2 Max can hit 80% capacity in simply 53 minutes, or it could possibly get a full cost shortly after that. That’s nice information if it’s worthwhile to exit and don’t have lengthy to high up the battery.

There are inputs for as much as 1000W of solar energy. Join the utmost, and EcoFlow says that the battery could be charged in 2.3 hours, though the energy of the solar and positioning of the photo voltaic panels will make a distinction.

EcoFlow Delta 2 Max power inputsEcoFlow Delta 2 Max power inputs
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Photo voltaic and AC energy could be mixed, utilizing a mixture of 1800W AC and 600W photo voltaic most. This reduces the 80% cost time to only 43 minutes.

Constructed to be sensible, the EcoFlow Delta 2 Max has power administration through the app for the photo voltaic enter, the place you’ll be able to select to prioritise photo voltaic enter to avoid wasting power, or use extra AC enter if you need extra power accessible for the battery.

Charging the battery through AC, I noticed that the EcoFlow Delta 2 Max used 2203Wh of energy to completely top-up to 2048Wh. That implies that the system attracts 107.58% of the battery capacity, which could be very aggressive and forward of the Ugreen PowerRoam GS1200 and simply forward of the Jackery Explorer 1000 Plus.


  • Environment friendly discharge
  • Lengthy life batteries

Utilizing LiFePO4 batteries, the EcoFlow Delta 2 Max has a quoted 80% capacity after 4000 cost and discharge cycles. Assuming that there’s linear degradation of battery capacity, this could imply that over its life, the EcoFlow Delta 2 Max would deal with 5528.17kWh of energy.

Primarily based on the worth of the ability station, this works out to a price of 34p per kWh of storage. That’s about common for a tool of this sort, and the associated fee tends to come back down when you go for a system with a smaller total capacity.

Observe that this value doesn’t embody the price of getting energy into the system, as that might be from a regular electrical energy socket or through an off-peak tariff and even through photo voltaic panels.

To see how environment friendly the inverter is at changing DC energy into AC energy, I discharged the battery utilizing a fan heater working at ~1000W. The entire measured energy output was 1.709kWh, which implies the system was 83.45% environment friendly. That’s wonderful, with wastage right down to the interior methods and the conversion between DC (battery) and AC (mains) energy.

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Do you have to purchase it?

You want an influence station with a excessive energy output

With 4 UK energy plugs and a excessive energy output of as much as 3100W, this can be a energy station that may deal with just about something.

You need one thing extra transportable

If you’d like one thing which you can extra simply carry round, a lighter system with round 1000Wh of energy could also be higher.

Remaining Ideas

The primary competitors is from the Dabbsson DBS2300, which has an identical capacity to the EcoFlow Delta 2 Max. Whereas the Dabbsson is barely cheaper per kWh saved and has bigger 3000Wh enlargement batteries, it has a decrease customary energy output and solely two UK energy plugs.

General, the EcoFlow Delta 2 Max is extra versatile with its excessive energy output and quicker charging, and it has a greater app with sensible power management, too. In the event you’re a excessive energy consumer and want that power to be transportable, this can be a nice system.

How we check

We check each battery station we evaluation completely over an prolonged time period. We use customary assessments to match options correctly. We’ll at all times let you know what we discover. We by no means, ever, settle for cash to evaluation a product.

Discover out extra about how we check in our ethics coverage.

We check with a wide range of units to see how lengthy the battery will final.

We check totally different charging strategies to see how rapidly the battery could be topped up.


What’s the utmost energy output of the EcoFlow Delta 2 Max?

Its AC ports are rated at 2400W, though X-Increase will increase this to 3100W, so most UK home equipment are supported.

Are you able to develop the EcoFlow Delta 2 Max’s storage?

Sure, it may be expanded with as much as two further 2048Wh batteries.



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