solar controller 1.12V or 12/24V auto work 2. For use with solar panels only... Application: Solar System Controller solar controllerFor household PV Controller ... over-charge,over-discharge,over-load,short-circuit,reverse-connect,reverse-prevent at night and over-heat. 7. Display ... over-charge,over-discharge,over-load,short-circuit,reverse-connect,reverse-prevent at night and over-heat. 7. Display ...