... :24V/20A 3.Batarry 200AH/12V Xuguang off-gride solar system Features: Green environment protection,All the energy from ... can be safe use indoor. Steady:Adopt high efficiency solar panel make enough electricity,high energy battery,power supply ... general fault automatic recovery, Long life: The life of solar panel is 25 years,controller's life is 10 years ... ,One time buy can use long time. Project case: