The North American solar photovoltaic (PV) market tacked on nearly another full gigawatt (GW) of installations in 4Q11, echoing a late-year surge seen in other markets (think Germany and Asia), says NPD Solarbuzz. New Jersey, California, Arizona, and Ontario accounted for two-thirds of that demand; more than half (59 percent) was for large-scale ground-mount systems.

According to a new SEPA report titled “Heating Up: The Impact of Third Party Business Models on the US Market for Solar Water and Space Heating,” Sixteen percent of the 110 million U.S. households are suitable for solar thermal systems, also referred to as solar domestic hot water systems. The report states that at given