The Solar Energy Industries Association and the Vote Solar Initiative released a report September 12 finding that Walmart, Costco, and Kohl’s are the top three American retailers using solar power at their facilities. The report, Solar Means Business: Top Commercial Solar Customers in the U.S., examined 42 companies that have installed solar photovoltaic systems at their facilities. Together the top 20 companies generate an estimated $47.3 million worth of electricity each year from the installations, deploying at least 279 MW of electricity annually.