This article on the San Bernardino County Sun’s website said  Walmart wants to double the number of on-site solar energy projects at its U.S. stores. The Sun article said:

"Walmart is the number one commercial solar energy user in the United States, according to the Solar Energy Industry Association. The company has 240 solar installations in the United States. There are 123 in California. In the Inland Empire, Chino, Colton, Corona, Fontana, Highland, Moreno Valley, San Bernardino, and Upland have Walmarts powered by solar panels. Walmart’s Riverside store on Van Buren will also have a solar installation in the future.”