True All-Round BMS Protection: Renogy 12V 300Ah Lifepo4 Battery built in with a reliable 200A battery management system (BMS) for regulating high discharge current of up to 200A. The included low-temperature cut-off makes for safer charging in winter and consistent performance in the long run. 2x Faster Self-Heating: Experience the power of the Renogy 12V 300Ah Core Series LiFePO4 Battery with a 200W self-heating system. Engineered for safety, this function ensures consistent charging in extreme cold down to -4¨H (-20¡æ), securing your energy needs in any weather conditions. Versatile & Seamless Connection: Set up your system in the way you want with renogy 300Ah battery core series, be it series, parallel, or series-parallel connection. Expandable up to 16 in series-parallel for maximum power up to 61.44kWh (4P4S, 51.2V 1200Ah). One-Stop Upgrade Solutions: Get solar panels, solar charge controllers, inverters, and accessories while upgrading from lead-acid batteries here at Renogy.