BYD 5kWh Lithium-ion Battery 51.2V (LV Flex Lite)

Note: BYD publish usable energy rather than a nominal nameplate, so the figure shown is already what you can take out - no derating needed. Test conditions are 100% depth of discharge, 0.2C, 25°C. Round-trip efficiency is at least 95%, which is the number that actually decides how much of your solar makes it back to the load. A different machine from the two LV5.0 boxes despite the same 5 kWh: this is a rack-mount module with carry handles, 132 mm high and 521 mm deep, and it installs with or without a rack. It stacks to 64 units for 320 kWh - double the 32-unit limit of the LV5.0 pair, and the reason to pick it for a large bank. Cells are explicitly cobalt-free LiFePO4. 10-year warranty. Two real trade-offs. Communication is CAN only - no RS485, no Bluetooth, no Wi-Fi - so check your inverter speaks CAN before ordering. And the peak is far weaker at 105 A for 5 seconds against the LV5.0's 200 A for 10 seconds, so it is the wrong choice for heavy motor starting. The operating window is also a single -10°C to +50°C range, warmer at the bottom end than the LV5.0's -20°C discharge floor. An optional pre-wired cabinet takes 4 modules (600 x 600 x 800 mm, 35 kg, IP20) but carries only a 3-year warranty against the battery's 10. Certified IEC62619, CE, UN38.3 and IEC62040. BYD publish no cycle life on this datasheet - there is no cycle-count row at all. Judge it on the warranty instead.