The 30 AMP Solar Charge Controller by Cyclops Solar Solutions regulates and protects 12/24 volt batteries from overcharging, short circuiting, discharging, and low voltage. This solar charger is maintenance-free protection for your solar panel and batteries and is small, compact and easy to mount. It handles up to 30 AMP or 400 watts of array current and has LED lights that indicate the charging status: Green= Charged Red=Low Voltage Charging Orange=Normal Charge. The LCD screen indicates system temperature, charging/discharging current, battery capacity and voltage of load. This controller is equipped with a blocking diode to prevent reverse polarity of batteries and solar panels. You are able to set your own parameters of load off voltage and load on voltage, and it can also be used with gel-cell and lead-acid 12/24 volt batteries. It is recommended for use with solar panels that are 12 Watt and larger.