Function: 1 Built-in industrial microchip with excellent memory capabilities 2. Large screen LCD display with adjustable charging and discharge parameters. 3 Complete 3-stage PWM charging management 4 Internal overcurrent/short circuit protection, open circuit protection, and reverse connection protection are all self-restoring and undamaged controllers. 5 Dual MOS reverse current protection, low heat generation. Specifications: Condition: 100% Brand New Item Type: UHF Antenna Material: ABS Voltage: 12V / 24V Automatic Fit Optional Current: 10A, 20A, 30A, 40A, 50A, 60A Solar Panel Voltage: 12V; 3 Stage: 18V, 24V, 36V Solar Panel Floating Charging Voltage: 13.7V Discharge Cut-off Voltage: 10.7V Discharge Recovery Voltage: 12.6V Standby Current: