Prevents Overcharging 12V Batteries Protect Battery from Overcharge and Discharge For Use with 12 Volt Solar Panels and Batteries Only Handles up to 7 Amps of Array Current Handles up to 100 Watts of Solar Power Maintenance Free Protection of Your Solar Panel and Batteries Maintains Battery Voltage Maintain 12V Batteries in a Fully Charged State Operation: Charging Light Indicates Battery Charging Green Light Indicates Full Battery Installation: Connect the Solar Panel Terminals to the Solar Controller Terminals Connect the Solar Controller 0-Rings to the Battery Terminals