EcoFlow STREAM Ultra X
Configuration
| Capacity | Max output | from | €/kWh |
|---|---|---|---|
| 3.8 kWh | 1.2 kW | €1,199 | €316 |
| 7.7 kWh | 1.2 kW | €2,299 | €299 |
| 11.5 kWh | 1.2 kW | €3,449 | €300 |
| 15.4 kWh | 1.2 kW | €4,599 | €299 |
Specifications
Cell chemistry | LFP |
Max output | 1.2 kW |
Phases | 1 |
Solar input | 2000 W |
Backup power | Yes |
P1 meter | Yes |
Home Assistant | No |
IP rating | IP65 |
Cycle life | 6000 |
Warranty | 10 jr |
Weight | 38.8 kg |
Base unit 3.84 kWh, expandable to ~23 kWh; capacity scales but inverter AC output stays 1200W (does not step with modules). Inverter continuous AC output 1200W per the official datasheet. Grid-tie/feed-in capped at 800W (Dutch socket rule). 2300W (10A) figure is bypass passthrough (battery 1200W + grid 1100W), not pure inverter output, so not used as maxOutputW. PV: 4 MPPT, 2000W total (500W x 4). Backup outlets exist but it is not a true UPS (not seamless). P1 meter included; compatible with Shelly 3EM/Pro 3EM, Tibber Pulse, Homey P1. Home Assistant only via third-party cloud integration (e.g. hassio-ecoflow-cloud), no native/local support; set false. No Modbus interface documented; left null. Round-trip efficiency not published by manufacturer. usablePct not published. 6000 cycles to 70%.
Sources
All figures are model estimates from public data and assumptions, not a guarantee or financial advice. Real results depend on market prices, your usage and your equipment. Verify with the provider and installer before deciding.
Prices are a rough guide for now and update automatically later.