Features: 1) Working voltage: 12V, 24V 2) Rated current: 8A, 16A, 20A, 30A, 40A, 50A, 80A, 100A 3) Acts as a solar charger when connect with a solar panel 4) According to the voltage of battery, controller will adjust the charging current and decide if to supply power to the loads 5) Generally keeps battery on full voltage 6) Prevents battery from over-charging 7) Prevents battery from over-discharging 8) Prevents battery from supplying power to solar panels during darkness