Snow and Solar A crew works on installing the rack system for a new solar array at Hill Air Force Base, Utah, Dec. 12, 2018. The fixed 25-degree angle of the system provides maximum production to the base during peak electrical consumption periods. SHARE IMAGE: Download Image: Full Size (5.83 MB) Tags: energy Photo By: R. Nial Bradshaw, Air Force VIRIN: 181214-F-OD616-0002.JPG Photo Gallery