DENVER, Colo. — RGS Energy said it has accepted its first customer purchase order for its solar shingle system and is working with a lender to help roofing contractors more easily carry its line of products.

RGS (Real Goods Solar) Energy manufacturers the Powerhouse Solar Shingle System after it struck an exclusive deal in 2017 with Dow Chemical to license and sell shingles featuring technology developed by Dow. The public company is listed on the Nasdaq.