This 30-Amp Charge Controller regulates the current from one or several solar panels to avoid overcharging 12-volt batteries.PWM-Pulse Width Modulation technology provides higher charging efficiency and maintains a higher battery reserve than standard charge controllersKey FeaturesUse with any 12 Volt or 24 Volt systemLoads current and battery voltage in five-second intervalsHandles up to 525 watts of solar arrayRegulated PWM output to prevent overchargingProtects battery from high voltage surges, short circuit, low voltage dischargingFeatures overcharge protection, easy access front connection terminals and LED charge status indicatorsDischarging Current: 30ACharging Current: 30AOvercharge Protection: 14.4V±1%Starting Voltage 12.3VOver discharge: Cut-off 10.7V±1%, Resume 12.6±1%No load current: ≤10mADisplay: LEDOperating temperature: -13ºF to 131 ºF (-25℃ to 55℃)Altitude: Below 3.4 miles (5500m) [above 1.24 miles (>2000m) causes reduced power]