About Solar Power Solar power photovoltaic (PV) systems independently convert the sun's light into electricity. This electricity can be used: directly from the sun stored in batteries or fed into an electric utility's grid system.   A diagram of a typical system is shown above. The selection and proper installation of appropriately-sized components directly affect system reliability, lifetime, and initial cost. In any installation, one must keep in mind that trade-offs are necessary in system design and component selection. Our goal in this section is to provide the background information so that you can understand the general type, size, costs and design issues of a solar energy system that is best for your home or business.