Alpha ESS SMILE-G3-T10 vs EcoFlow STREAM Pro
Usable capacity: Alpha ESS SMILE-G3-T10 3.65 kWh, EcoFlow STREAM Pro –. The Alpha ESS SMILE-G3-T10 is better on 3 of 6 comparable points.
Who wins where
- Alpha ESS SMILE-G3-T10
- EcoFlow STREAM Pro
Biggest differences
| Fact | SMILE-G3-T10 | STREAM Pro |
|---|---|---|
| Charge power (continuous) | 10 kW | 1.05 kW |
| Discharge power (continuous) | 10 kW | 1.2 kW |
| Expandable up to | 43.8 kWh | 11.52 kWh |
Score per area = position (0–100) relative to all 130 models in this category; higher is better.
| Technical specifications | Alpha ESSSMILE-G3-T10 | EcoFlowSTREAM Pro |
|---|---|---|
| General | ||
| Cell chemistry | LFP 1 | LFP 2 |
| Smart charging on dynamic prices | – | Yes 2 |
| Wi-Fi / app | Yes 1 | Yes 2 |
| Performance | ||
| Usable capacity | 3.65 kWh 1 | – |
| Nominal capacity | – | 1.92 kWh 2 |
| Expandable up to | 43.8 kWh ✓ 1 | 11.52 kWh 2 |
| Charge power (continuous) | 10 kW ✓ 1 | 1.05 kW 2 |
| Discharge power (continuous) | 10 kW ✓ 1 | 1.2 kW 2 |
| Efficiency | ||
| Depth of discharge | 95 % 1 | – |
| Electrical | ||
| Phases | 3 3 | – |
| Backup power | Yes 1 | Yes 2 |
| Off-grid capable | – | Yes 2 |
| Dimensions & weight | ||
| IP rating | – | IP65 2 |
| Min. operating temperature | – | -20 °C 2 |
| Width | – | 284 mm 2 |
| Height | – | 458 mm 2 |
| Depth | – | 255 mm 2 |
| Weight | – | 22.8 kg 2 |
| Warranty & lifespan | ||
| Warranted cycles | – | 6,000 2 |
| Warranty | 10 years 1 | 10 years 2 |
Sources
- SMILE-G3-T4/T5/T6/T8/T10 Residential Series, V09.15012025 — Alpha ESS · accessed 29 Sept 2026
- EcoFlow STREAM Ultra/Pro Specifications, 1.0 — EcoFlow UK · accessed 29 Sept 2026
- ENA Type Test Register (inverters) — Energy Networks Association (ENA) · accessed 27 Sept 2026