To deal with frequent power outages, rooftops of small houses are best suited for the installation of small solar power packs in the free space available. The typical electrical load in domestic use is for lights, fans, televisions, refrigerators, computers, etc.
A small solar power plant of 1 KW is adequate to drive a load of approximately 300 watts for four hours with a small battery bank, depending on solar insolation in the area. The solar energy is directly converted to electrical energy by solar modules. This can be used immediately to drive the loads or stored in batteries for usage at the time of power outages.
Standalone systems can also be used in rural areas where the grid is not available. The system can charge the batteries during day and provide electricity to drive lighting load at night. The solar system does not require maintenance; regular cleaning of modules can keep the system up and running.