Features: Industrial-grade master chip, 16 AD sampling accuracy, temperature, charging current, discharge current accurate real-time display. Automatic focusing MPPT tracking charging, high charging efficiency, non-stop detection during charging, bidirectional focusing tracking. Big LCD display, all adjustable parameter. Three-stage charge management, effectively protect the battery. Build-in short-circuit protection, open-circuit protection, reverse protection, over-load protection. Two-way moss tube anti-backflow circuit, high-power charging mode, ultra-low heating. Specification: Condition: 100% Brand New Material: ABS Color: As Picture Shown Options: 40A, 50A, 60A, 100A Battery Voltage: 12V 24V Auto Solar panel voltage: 12V, 18V solar panel, 24V, 36V solar panel Float charge: 13.7V(defaul,adjustable) Discharge stop: 10.7V(defaul,adjustable) Discharge reconnect: 12.6V(defaul,adjustable) Self-consume: <10mA USB output: 5V / 2A Maximum Package list: 1 x Controller 1 x User Manual Note: This product is a simplified version for MPPT.