Types of Systems: Small Stand-Alone DC System
The small stand-alone system is a good method of providing  power for basic lighting and equipment, in a remote cabin, recreational vehicle,  or boat. The size of the photovoltaic (PV) array and battery will depend upon individual power requirements. 

The PV array charges the battery during daylight hours and the battery supplies power to the loads as needed. The charge control terminates the charging when the battery reaches full charge. The load center may contain meters to monitor system operation and fuses to protect wiring in the event of malfunction or short circuit in the house.