BYD Battery-Box Premium LVS 4.0 — 4.0kWh LiFePO4 48V Modular Battery

The BYD Battery-Box Premium LVS 4.0 is a 4.0kWh modular LiFePO4 wall-mount battery from BYD — the world's largest manufacturer of LiFePO4 batteries and one of the two largest EV battery manufacturers globally. Each LVS 4.0 module provides 4kWh at 48V and up to 5 modules stack on a shared LVS Base Box for 20kWh total capacity. Battery modules snap together vertically with a bus-bar connection — no inter-module wiring required. BYD's proprietary cobalt-free LiFePO4 chemistry provides superior thermal stability and safety vs. NMC alternatives — passing UN38.3, IEC 62619, and achieving UL 9540 energy storage system listing. BMS handles cell-level balancing, SoC reporting, and temperature monitoring with CAN 2.0B communication to compatible hybrid inverters. Compatible inverters: Fronius Primo GEN24 / Symo GEN24, SMA Sunny Tripower / Sunny Boy Storage, Victron MultiPlus (via LYNX BMS), Solis, Deye. Not compatible with Growatt or EG4 without an external relay/BMS converter. Cycle life: ≥6000 cycles to 80% at 25°C. Weight per module: 23.4kg. Dimensions (module): 390 × 590 × 180mm. IP55 rated. 10-year product warranty. Suitable for low-voltage (48V nominal) hybrid inverter systems in residential and light commercial installations.