The Willow Beach campground is managed by the National Parks Service. It is located in Arizona on the Colorado river a few miles South of Lake Mead and Hoover dam. At this site there are three solar photovoltaic arrays and one solar thermal array to heat water for showers. The photovoltaic arrays are monitored and the data sent to a web site which allows anyone to see the data.
35°52’25.66″ N 114°39’09.10″ W