EcoFlow
EcoFlow STREAM Ultra
4.6 800W + 1.92kWh
All-in-one balcony system: 800W microinverter, a built-in 1.92kWh LFP battery and 4-channel MPPT — store the day's generation and use it at night.
PowerGuide is reader-supported. We may earn a commission from links on this page — it never affects our rankings or what we recommend.
Specifications
| Max AC output | 800 W |
|---|---|
| UK-legal (≤800W) | Yes |
| Max PV input | 2000 W |
| Battery | 1.92 kWh |
| Battery expandable | Yes |
| MPPTs | 4 |
| Weatherproofing | IP65 |
| App control | Yes |
| Panels included | No |
Our verdict
The standout balcony system in 2026: a legal 800W output, generous 2,000W of PV input across four trackers, and a built-in battery so evening usage is covered. Expandable if you want more storage later.
Pros
- Built-in 1.92kWh battery
- 4 MPPTs / 2,000W PV input
- Expandable storage
- Slick app
Cons
- Panels bought separately
- Premium price vs inverter-only kits