The Xantrex PWM Controllers can be used as PV charge controllers, DC load controllers, or DC diversion regulators in 12-, 24-, and 48- volt systems (except only the C40 can be used in 48-volt systems). They operate in only one mode at a time,, so to provide both PV charge controller and low battery load disconnect, two controllers much be used. As DC load controllers they disconnect the load at a user-settable low voltage and reconnect at a higher voltage reconnect point. As diversion controllers they send excess power to a