LiFePO4 Solar Lithium Battery 51.2V 200ah for Solar Storage Ultra-reliable Lithium Iron Phosphate (LiFePO4) technology Integrated battery management System (BMS) Ultra-long cycle life Light weight & compact 1/3 Weight of Lead Acid Water & dust resistant (IP56) Highly durable ABS enclosure Drop-in lead acid replacement Environment friendly: -20�ºC~60�ºC Bluetooth App is optional Built in BMS overall protection 1.Over charged protection 2.Over discharged protection 3.Thermal protection 4.Over current protection 5.Cell balancing