One of the most ambitious solarpower projects in the U.S. received the regulatory greenlight Thursday from the California Public Utilities Commission. The commission voted unanimously to approve Southern California Edison’s plan to install scores of 1-2MW photovoltaic grid-connected systems on the rooftops of commercial buildings throughout the utility’s Southern California service area. Under the terms of the approved measure, SCE will own, install, operate, and maintain 250MW of PV panels in the next five years and will solicit bids from independent suppliers to deploy another 250MW. Together, the added solar capacity will provide enough electricity to meet the needs of up to 320,000 Southern California households.