Feature: 1. Advanced Maximum Power Point Tracking (MPPT) technology, the efficiency is not less than 99.5% 2. Improve system performance, the highest conversion efficiency is 98%, UItra fast tracking speed, to ensure tracking efficiency 3. 12 24VDC automatic identification of system voltage, LCD panel display design, dynamic display of tool operating data and working status 4. Supports 3 rechargeable battery options: sealed, gel, and liquid filled 5. Charging method is divided into three stages, constant current, constant voltage, and floating charge to extend battery life 6. Built in battery temperature compensation function, and multiple load working modes 7. This solar charge controller has a 3 hour function, A: work at night time B: pause during the period, C: work at dawn Specification: Item Type: MPPT Solar Controller Material: ABS, aluminum Purpose: Reduce the high voltage solar array and charge the low voltage battery pack. Widely used in many fields such as RVs, communication base stations, household systems and field monitoring Maximum Power Current: 100A Load Output Power: 40A (the unit is correct) Installation Wire Diameter: 20m?O (4 AWG) Summit Power of Solar Panels (Maximum Wp): ??1300Wp Battery Capacity Configuration: ??800AH Product Size: Approx. 280 x 190 x 85mm / 11 x 7.4 x 3.3in Battery Float Voltage: 13.8V(12V system), 27.6V(24V system) Battery (Undervoltage) Protection: 10.6V(12V system), 21.2V(24V system) Battery (Undervoltage) Recovery Voltage: 12.6V(12V system), 25.2V(24V system) System Load Loss: ??13mA Loop Voltage Reduction: ??100mV Working Temperature: -10??-60?? Storage Temperature: -30??-70?? Humidity Requirements: