NREL ESIF Illustration NREL ESIF Illustration from Kyla Vana NREL ESIF Illustration Cut-away illustration of the Energy Systems Integration Facility (ESIF) and the National Renewable Energy Laboratory (NREL) in Colorado. gLike NREL ESIF Illustration Cut-away illustration of the Energy Systems Integration Facility (ESIF) and the National Renewable Energy Laboratory (NREL) in Colorado. Illustrator Illustration Share R 7 n Kyla Vana Graphic Designer/Web Developer Madison, WI Follow Contact