EcoFlow STREAM AC
A 1.92 kWh LiFePO4 expansion battery for the STREAM series. It has no solar input and no inverter of its own, so it adds storage to a STREAM system.
- Best for expanding a STREAM
- Expansion battery
- 1.92 kWh
- No solar input
- Role: adds capacity to a STREAM system. EcoFlow says it expands the battery capacity of a STREAM plug-and-play solar plant.
- Capacity: 1.92 kWh with LiFePO4 cells, rated 600 W or 800 W depending on model.
- Solar: none. The specification lists only a grid terminal and no solar input.
- Rules: in the UK, EcoFlow says direct plug-in is not permitted and a qualified electrician must connect it.
Not tested by us
We have not tested the EcoFlow STREAM AC. The figures on this page come from the sources listed at the end of the page, checked on 10 November 2026, and we do not show prices. "Best for" is based on what the maker says the product is designed for, not on our own tests.
Key figures
1.92 kWh
Rated capacity
800 W
Max charge and discharge (600 W model also listed)
IP65
Indoor and outdoor rated
Specifications
Last checked on 10 November 2026. The grey text under each name explains what the value means.
| Specification | Value |
|---|---|
| Storage | |
| CapacityHow much energy the battery stores. Bigger means longer runtime or more of your own solar power used later. | 1.92 kWh rated (19.2 V) |
| Battery chemistryLFP (lithium iron phosphate) cells are known for long life and stable behaviour with heat. | Lithium iron phosphate (LiFePO4) |
| Cycle lifeHow many full charge and discharge cycles the cells are rated for before they hold less than the stated share of their original capacity. | 6,000 cycles, tested at 0.5C charge and discharge at 25 °C. The end-of-life capacity is not stated. |
| ExpansionExtra battery units that add storage to the same system. | Up to six STREAM devices in one system, stacked no more than two high. The STREAM AC goes at the end of the connection chain. |
| Power | |
| AC outputThe power it can deliver through its sockets or inverter, in watts. | 600 W (model EF-EA-AC-2K-600) or 800 W (model EF-EA-AC-2K-800), at 230 V, 50 Hz |
| Charge and discharge powerHow fast the battery can take in and give out energy. It sets how many devices it can serve at once. | 800 W maximum charging and 800 W maximum discharging |
| AC charging inputHow fast it charges from a wall socket or the grid. | 800 W maximum, 3.48 A |
| Efficiency and standby useLosses when charging, discharging and doing nothing. | Not stated in the sources we read |
| Solar | |
| Solar inputHow much solar panel power it accepts. A higher figure fills the battery faster on a sunny day. | None listed. The specification shows a grid terminal only. |
| Connection and housing | |
| Dimensions (W × D × H)Check the space before you buy, including room around it for airflow and cables. | 255 × 254 × 458 mm, as listed by EcoFlow |
| WeightMatters for lifting, wall mounting and moving it. | 21.2 kg |
| Protection ratingIP ratings show protection from dust and water. IP55 and IP65 are rated for outdoor-style exposure; check the installation guidance. | IP65, indoor and outdoor |
| Operating temperatureThe range it is rated to work in. Cold and heat can reduce performance. | -20 to 55 °C, with performance that may be reduced above 35 °C |
| Noise levelFan noise while working. | No decibel figure stated. Cooled by natural convection, with no fans. |
| ConnectivityHow you monitor and control it, usually through an app. | Wi-Fi and Bluetooth, with the EcoFlow app |
| Warranty | |
| WarrantyThe period the maker covers. Read the terms: conditions and capacity guarantees differ. | 10 years, as EcoFlow's UK page states it for the STREAM series. The STREAM AC is not listed separately there. |
Compatible with
What EcoFlow says this product works with. Anything not listed here is not confirmed.
- STREAM devices
- STREAM Ultra, STREAM Pro, STREAM AC Pro, STREAM AC, STREAM Max and STREAM Ultra X, up to six devices in total.
- Smart plugs and meters
- EcoFlow lists its own smart plug and meter, EcoFlow x Shelly versions, Shelly 3EM and Pro 3EM, and Tibber Pulse IR. Only one type of sensor should be used at a time.
- Dynamic tariffs
- EcoFlow lists Nordpool, EPEX Spot, Rabot Charge, Octopus and Tibber for its tariff integration.
- Backup in a power cut
- Not compatible: EcoFlow says that when it is connected to your home circuit, the STREAM AC does not switch to battery power for your loads during a grid outage.
Rules where you live
Rules for plug-in batteries differ by country. EcoFlow's manual says that in the United Kingdom direct plug-in is not permitted, and that a qualified electrician must connect the STREAM AC to a circuit breaker with the supplied DIY cable. In Great Britain, plug-in solar kits of up to 800 VA have been legal since 27 August 2026, but the rules exclude plug-in batteries.
Check the rules, incentives and tariffs for your own country in our country guides.
Strengths and things to check
Strengths
- Adds 1.92 kWh to an existing STREAM system
- Up to six STREAM devices in one system
- IP65 and a -20 to 55 °C operating range
- No fans
Worth checking before you buy
- Not a stand-alone product: it has no solar input and needs another STREAM device
- Output is 600 W or 800 W depending on the model
- In the UK it must be connected by a qualified electrician, not plugged in
- No backup power for your loads in a grid outage
Change log
We record changes to this page here, so you can see when figures such as the warranty were last updated.
- 10 November 2026
- Page published. Warranty at publication: 10 years (EcoFlow UK STREAM page, series level).
Where this information comes from
We have not tested the STREAM AC. Every figure above comes from EcoFlow's STREAM AC user manual and EcoFlow's UK STREAM page, last checked on 10 November 2026. The STREAM AC is a different product from the STREAM AC Pro. Where the sources give no value, we say so.
We do not show prices, because they change often and differ between sellers.
- Manufacturer EcoFlow STREAM AC user manual (EU/UK)
- Manufacturer EcoFlow UK STREAM Ultra page
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Common questions about EcoFlow STREAM AC
Is the EcoFlow STREAM AC a battery on its own?
No. EcoFlow describes it as a way to expand the battery capacity of a STREAM plug-and-play solar plant. It has no solar input, so you need at least one other STREAM device.
Can I plug the STREAM AC into a socket in the UK?
EcoFlow's manual says direct plug-in is not permitted in the UK and a qualified electrician must connect it to a circuit breaker. In Great Britain the rules for plug-in solar kits of up to 800 VA exclude batteries. Check our country guides.
What is the difference between the 600 W and 800 W models?
EcoFlow lists two model numbers, EF-EA-AC-2K-600 and EF-EA-AC-2K-800, with a rated output of 600 W and 800 W. The battery is 1.92 kWh in both. We could not tell which one is sold in your country.
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