BYD Battery-Box Premium HVM 8.3 vs EcoFlow OCEAN 2 LFP Battery 8kWh
Usable capacity: BYD Battery-Box Premium HVM 8.3 8.28 kWh, EcoFlow OCEAN 2 LFP Battery 8kWh 7.76 kWh. Both models win equally often (1 of 3 points).
Who wins where
- BYD Battery-Box Premium HVM 8.3
- EcoFlow OCEAN 2 LFP Battery 8kWh
Biggest differences
| Fact | Battery-Box Premium HVM 8.3 | OCEAN 2 LFP Battery 8kWh |
|---|---|---|
| Min. operating temperature | -10 °C | -20 °C |
| Usable capacity | 8.28 kWh | 7.76 kWh |
Score per area = position (0–100) relative to all 39 models in this category; higher is better.
| Technical specifications | BYDBattery-Box Premium HVM 8.3 | EcoFlowOCEAN 2 LFP Battery 8kWh |
|---|---|---|
| General | ||
| Cell chemistry | LFP 1 | LFP 2 |
| Wi-Fi / app | – | Yes 2 |
| Performance | ||
| Usable capacity | 8.28 kWh ✓ 1 | 7.76 kWh 2 |
| Nominal capacity | – | 8.03 kWh 2 |
| Expandable up to | 66.2 kWh 1 | – |
| Charge power (continuous) | – | 4.1 kW 2 |
| Discharge power (continuous) | – | 4.1 kW 2 |
| Peak power | – | 6.4 kW 2 |
| Efficiency | ||
| Round-trip efficiency | 96 % 1 | – |
| Electrical | ||
| Coupling | – | DC-coupled 2 |
| Backup power | Yes 1 | Yes 2 |
| Off-grid capable | Yes 1 | – |
| Dimensions & weight | ||
| IP rating | IP55 1 | IP66 2 |
| Min. operating temperature | -10 °C 1 | -20 °C ✓ 2 |
| Width | 585 mm 1 | 680 mm 2 |
| Height | 995 mm 1 | 378 mm 2 |
| Depth | 298 mm 1 | 196 mm 2 |
| Weight | – | 67.5 kg 2 |
| Warranty & lifespan | ||
| Warranty | 10 years 1 | – |
Sources
- Battery-Box Premium HVM – datasheet, BCU2.0 V1.0 EN (28.03.2025) — BYD Lithium Battery Co., Ltd. · accessed 27 Sept 2026
- EcoFlow OCEAN 2 Three-Phase – Datasheet (EN), Datasheet_EN, PDF van 08.09.2026 — EcoFlow Inc. · accessed 27 Sept 2026