Solar photovoltaic (PV) power generation is the process of converting energy from the sun into electricity using solar panels. Solar panels, also called PV panels, are combined into arrays in a PV system. PV systems can also be installed in grid-connected or off-grid (stand-alone). We use the solar resource to provide daylight, electricity, and heat, and we harness it with four different methods (in order of prevalence): Indirect: Free light and warmth, our primary use of the sun's energy (not counted in the data below but important for energy efficiency) Solar PV (79% of. Solar energy is radiant energy from the sun—a fully renewable energy resource. It is one of the fastest-growing renewable energy technologies and is playing an increasingly important role in the global energy. This section covers the fundamentals—how solar energy works, where it comes from, and why it's become one of the most important energy sources in the world. It is a “carbon-free” energy source that, once built, produces none of the greenhouse gas emissions that are driving climate change. There are several ways to turn.
