EcoFlow STREAM Ultra

Cost

Price

£899

Price per kWh The unit on its own, divided by its capacity. No installation is included.

£468

See it at EcoFlow

Battery

Battery chemistry LFP packs tolerate regular charging to 100%; NMC packs are usually happier kept below it.

LFP

Usable capacity What you can actually take out, which is less than the figure on the box.

1.92 kWh

Continuous output 1,200 W out of its own socket, and 800 W tied to the grid, which is the figure that matters plugged in.

1.2 kW

Warranted cycles

6,000 cycles

Capacity at end of warranty What the maker guarantees is left after the warranty period.

70 %

Can be added to Whether you can bolt on more capacity later.

Yes

Expands to Six units linked together.

11.52 kWh

Solar input 2,000 W across four MPPTs, the most of the three and the same as the Ultra X.

2 kW

Smart meter EcoFlow's own, or the co-branded EcoFlow and Shelly Pro 3EM.

Its own or Shelly

Home Assistant Community integrations only, on EcoFlow's developer API: an access key and a trip through EcoFlow's servers, with nothing local.

Community, cloud

Charging

Weather rating The IP rating: the first digit is how well it keeps dust out, the second water. Below IP65 it wants to be indoors. Ranked as the higher number, though strictly a 7 is an immersion test where a 6 is a jets test, so one does not always include the other.

IP65

Warranty

10 years

Tech

App

Yes