Our SLC series solar light controller that adopts the most advance digital technique and operates fully automatically. The pulse width modulation (PWM) batteries charging can greatly increase the lifetime of battery. Current Rating: 10 A Voltage Rating: 12 / 24 V DC Maximum battery voltage: 32 V DC NTTV(night time threshold voltage): 12V system: 5V NTTV(night time threshold voltage): 24V system: 10V DTTV(daytime threshold voltage): 12V system: 6V DTTV(daytime threshold voltage): 24V system: 12V Overall dimension: 150 x 82 x 50 mm Weight:0.35kg