
BYD Battery-Box Premium HVS 2.56kWh LiFePO4 Battery Module, 102.4V
The Battery-Box Premium HVS is built from 2.56kWh modules: two make 5.12kWh, five make 12.8kWh, and up to three identical towers in parallel reach 38.4kWh. This is the single module, which you need both to build a new tower and to extend one you already have.
Cobalt-free LFP cells, 102.4V nominal per module, 25A charging and discharging with peaks of 50A for three seconds. Usable energy is stated at 100% depth of discharge rather than 90% as many do: that is a more honest way to measure, and it means the stated kWh are the ones you use. Round-trip efficiency above 96%.
IP55, so it tolerates a damp room, and an operating range of −10 to +50 °C with derating between −10 and +5 °C. 38 kg per module. CAN and RS485 communication. VDE 2510-50, IEC 62619, CE and UN 38.3 certified, 10-year warranty under the terms of BYD’s warranty letter. Inverter compatibility must be checked against BYD’s official list.
At a glance
Technical data
| Specification | Value |
|---|---|
| Product code | 12911241-00 |
| Model | BYD Battery-Box Premium HVS |
| Chemistry | LiFePO4 (LFP), cobalt-free |
| Nominal energy | 2.56kWh per module |
| Nominal voltage | 102,4V |
| Max charge/discharge current | 25A |
| Peak current | 50A for 3 s |
| Tower configurations | 2 modules 5.12kWh · 3 modules 7.68kWh · 4 modules 10.24kWh · 5 modules 12.8kWh |
| Towers in parallel | up to 3 identical towers, maximum 38.4kWh |
| Round-trip efficiency | ≥ 96% |
| Communication | CAN, RS485 |
| Protection rating | IP55 |
| Operating temperature | −10 … +50 °C (derated between −10 and +5 °C) |
| Weight | 38 kg per module |
| Applications | on-grid, on-grid with backup, off-grid |
| Certifications | VDE 2510-50, IEC 62619, CEC, CE, UN 38.3 |
| Warranty | 10 years, under BYD’s warranty terms |