In 1975, the U.S. Department of Energy (DOE) decided to harness the power of the sun, launching the Solar Energy Research Institute, which later became the National Renewable Energy Laboratory (NREL). Over the subsequent 40 years, DOE, its Solar Energy Technologies Office, and the national laboratories have engaged with innovators, businesses, and entrepreneurs to channel one of our planet’s greatest resources into sustainable, clean, and cost-effective energy.