... 2. For use with solar panels only... Application: Solar System Controller solar controllerFor household PV Controller Main characteristics: 1. From ... such as over-charge,over-discharge,over-load,short-circuit,reverse-connect,reverse-prevent at night and over-heat. 7. Display ... voltage sensor. 11. Thunder-defend: according to demand of system, install SPD of different levels. 12.Automatically turn on by ...