The small "Stand-Alone" system is an excellent
system for providing electricity economically. These systems are used
primarily for RV power, lighting, cabins, backup and portable power systems.
The size of the photovoltaic array (number of solar panels) and battery
will depend upon individual power requirements. The solar panels charge
the battery during daylight hours and the battery supplies power to the
inverter as needed. The inverter changes the 12 volt batteries DC power
into 120 volt AC power, which is the most useful type of current for most
applications. The charge controller terminates the charging when the battery
reaches full charge, to keep the batteries from "gassing-out",
which prolongs battery longevity.