St. Louis Post-Dispatch: Even amid the economic storm clouds, Eric Swillinger sees rays of sunlight. Swillinger is a partner in Missouri Solar Living LLC, a St. Louis-area solar installer he co-founded in 2006. The company, run from his Olivette home, generates about $500,000 of revenue a year. But Swillinger thinks sales could triple in 2010 as interest in renewable energy grows and new policies put solar technology within reach of more people. “We’re setting our goals high because of the incentives …