Renewable energy sources, including wind, hydropower, solar, biomass and geothermal, contributed 20% of US electricity in 2021. This proportion is rapidly expanding; over 60% of new electricity generation capacity in 2022 will be renewable.
A clean energy industry needs specific equipment to work. Solar energy needs solar panels with photovoltaic (PV) cells designed to convert energy from the sun. Wind energy needs turbines. Renewable energy often relies on batteries to store energy from intermittent energy sources such as wind and solar, which only generate electricity about 40% of the time.
