Solar Array A new 350 kilowatt-hour solar array was installed near the Hill Aerospace Museum at Hill Air Force Base, Utah, June 25, 2021. Rocky Mountain Power built the array and will own and operate it for the next 25 years as part of its Blue Sky program, but the base will add the energy generated to its power grid. SHARE IMAGE: Download Image: Full Size (0.83 MB) Photo By: Cynthia Griggs, Air Force VIRIN: 210625-F-EF974-1004C.JPG Photo Gallery