HQRP 40 Amp Solar Battery Charge Controller/Regulator 40A 12V / 24V Auto Charging for Solar Power System with Street Lighting Control Plus UV Meter HQRP&reg; Solar Charge Controller plus HQRP&reg; UV Chain / UV Health Meter; Rated charge current: 40A; Rated load current: 40A; System voltage: 12V/24V Auto; Promote charging voltage: 14.6V; Straight charging voltage: 14.4V; Floating charging: 13.6V; Overcharge return voltage: 13.2V; Over discharge voltage: 12.6V; Over discharge return voltage: 12.6V; Control mode: PWM (Pulse Width Modulation); 200 days warranty!