SAMLEX SCC-30AB 12 / 24 VOLT 30 AMP PULSE WIDTH MODULATION ( PWM ) SOLAR CHARGE CONTROLLER WITH LCD DISPLAY. The Samlex SCC-30AB 30 Amp PWM Charge Controller regulates current and protects your batteries from over-charging. Features of this 4-stage Charger include: LED status indicators, digital LCD monitor and 8 charge settings for most battery types. Charging is further regulated with the optional DC-BTS-A-C Battery Temperature Sensor. Additional featues of this unit include dual voltage capability- can be used with 12 or 24 volt systems and the 30 amp charging capacity-enables use of up to 360 watts of 12 volts or 720 watts of 24 volts.