What are the three main ways to use solar energy?

The three main ways to use solar energy are photovoltaic (PV) systems, solar thermal systems, and concentrated solar power (CSP). PV systems convert sunlight directly into electricity using solar panels. Solar thermal systems capture sunlight to generate heat, which can be used for heating water or spaces. CSP utilizes mirrors or lenses to concentrate sunlight, producing steam to drive turbines for electricity generation.