* The installation is suggested to be completed by a licenced electrical contractor.. Self-heating: With built-in auto-heating, you can use the batteries safely in temperatures as low as -4°F.. Stackable and Expandable: Available in two sizes, both 2 and 5kWh stack up to 3 for a capacity of up to 15kWh.. Safety First: Hot-swap enabled.. Advanced BMS Protection Power Kits Battery Management System protects against:. Single-cell over-voltage protectionSingle-cell under-voltage protectionDischarging over-current protectionDischarging overheat protectionDischarging low-temperature protectionCharging over-current protection Charging overheat protectionCharging low-temperature protection* The installation is suggested to be completed by a licenced electrical contractor.. Self-heating: With built-in auto-heating, you can use the batteries safely in temperatures as low as -4°F.. Stackable and Expandable: Available in two sizes, both 2 and 5kWh stack up to 3 for a capacity of up to 15kWh.. Safety First: Hot-swap enabled.. Advanced BMS Protection Power Kits Battery Management System protects against:. Single-cell over-voltage protectionSingle-cell under-voltage protectionDischarging over-current protectionDischarging overheat protectionDischarging low-temperature protectionCharging over-current protection Charging overheat protectionCharging low-temperature protection