Schneider Electric C40 40 Amp Solar Charge Controller OR load diversion controller (may be only used for ONE of those functions at a time). The C40 can easily be setup in the field for 12, 24, or 48 volt battery systems with DIP switches. All three of the fully solid state, microprocessor-driven controllers are UL and cUL listed. Whatever the charging source, a C Series controller is sure to meet your DC controller needs. Product Features Ensures your batteries are always charged Silent, pulse width modulated microprocessor control (maximizing battery life) Field adjustable voltage and battery set points Electronic protection against short-circuit, overload, over temperature and reverse polarity conditions.