Wal-Mart's sustainability efforts, part of which is installing solar power generators on its stores, clubs and distribution centers, is going to be supplied with PV power systems coming from BP Solar, at least for their locations in California.

Under a power purchase agreement (PPA) reached for the projects, BP Solar will finance, install and maintain PV systems, while Wal-Mart will have immediate benefits of clean electricity with no up-front cost for the retailer. BP Solar will initially focus on building some 10 to 20 rooftop systems at Wal-Mart locations in California, evaluating potential for further engagement on other locations. It is expected the inital installation will be completed within 18 months, totalling in 10 MW of installed power capacity.

In 2008, BP Solar already completed installation of 4.1 MW of solar power for seven Wal-Mart stores and Sam's Clubs, also in California.