Photo Description
Natural Bridges National Monument
The Natural Bridges PV System was dedicated in June 1980. Before switching to PV power, the Monument consumed up to 200,000 kilowatt hours of electricity annually. With installation of the PV system and the implementation of energy-efficient measures, the Monument now consumes about 70,000 kWh annually with over 90 percent of that coming from the sun. Most heating and cooking needs continue to be met by liquefied petroleum gas.
The original 100 kW system and the original batteries provided excellent service for 10 years. In 1992, the system was refitted with new batteries and the array downsized to 50 kilowatts. The refurbishment was through a partnership among the National Park Service, U.S. Department of Energy, and the Utah Department of Natural Resources.
Credit: L & S Associates
