This charge controller is compatible with 12V 24V systems. Full 4-level PWM charging (boost, ABS, equalization, floating), power MOSFETs are used as electronic switches without any mechanical switches, and equipped with industrial-grade STM 8 microprocessors to extend battery life. Backlit LCD displays PV/battery/load charging and discharging parameters. Dual USB can provide maximum 5V 2.5A to your electronic devices. This solar controller is suitable for Li-ion/LiFePO4/Lead Acid Batteries (OPEN, AGM, GEL) with multi-load timer (load should be DC). It has a wide range of applicability and can automatically identify day/night. To protect battery life, the solar controller will automatically shut down once the battery voltage drops below 8V. PWM Charge Controller Protection: Dual MOSFET Reverse Current/Overheat/Undervoltage Discharge/Short Circuit/Open Circuit/Overload/Overcharge Protection. Safer for home, industry, commerce, etc.