Features: 2. & 12304; Fast charging speed & 12305; MPPT solar controller has high charging efficiency, automatic focusing MPPT tracking and loading, high charging efficiency, uninterrupted detection and charging, bidirectional focusing and tracking 4. & 12304; High tracking efficiency & 12305; The solar fast charging controller adopts innovative MPPT technology, with a tracking efficiency of up to 99%. Compared with ordinary controllers, the efficiency can be improved by 10% -30% Function: 1. Always keep the battery at charging voltage. 2. Prevent overcharging of the battery. 3. Prevent excessive battery discharge. 4. Prevent the battery from charging backwards on the solar panel at night. 5. Battery reverse connection protection. 6. Reverse connection protection of solar panels. 7. When the battery voltage is low, the controller will automatically reduce the system load. If the battery voltage returns to normal, restart charging. 8. The controller automatically compensates for temperature, and the charging voltage is a function of environmental temperature changes. Specification: Name: Solar Charge Controller Rated Current: 50A-100A System voltage:12V/24V Max PV Voltage Input:50V Size: 115*60*22mm Color: black Packing included: 1 x Solar Charge Controller Note: 1. Due to manual measurements and slight color variations, please allow 1-3 cm (0.4-1.18 inches) difference to suit different display settings. 2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.