SAN FRANCISCO, July 2, 2012 /PRNewswire/ -- Santerno has been awarded with a supply contract for 155 MW of Santerno skid inverter stations to be installed in an Imperial Valley, California solar plant. "This contract is a milestone for Santerno, as it signals our entrance into the USA Solar Farm Market," says Guido Tonin, Executive Vice President of Santerno Inc., the North America subsidiary…