For up to two 12V or 24V batteries. Total charging current: 20 A. Charge controller for small solar systems. Suitable for LiFePO4 batteries with integrated BMS only. LCD display for quick and easy settings and control. Three stage battery charging (bulk, absorption, float), programmable. Two 5 Volt USB outputs. External Temperature sensor included. Protected against reverse polarity connection of the solar array and/or battery.