FAQ: What is Solar Energy? July 24, 2018July 24, 2018 A: Solar energy refers to energy from the sun. The sun has produced energy for billions of years. (https://www.conserve-energy-future.com/various-solar-energy-facts.php) Solar Energy is a completely free source of energy. Post navigation FAQ: How does solar affect my home equity value?FAQ: Why is Solar gaining in popularity?