A Solar PV system can be a Stand-alone, i.e. off-grid, system that is self-sufficient. It supplies unlimited source of Solar energy on its own without being connected to the local grid. The system can re-charge itself, store and produce electricity even on gloomy days. Excess generated energy is stored to the batteries.
It is a perfect option in remote areas where electricity services are unavailable, unreliable or unaffordable. Alternatively, you may want to achieve independence from the local power provider and not have to worry about power failures even when the local electricity grid breaks down. Or you may want to show your commitment and support to non-polluting energy sources.