Solar Really is Getting Cheaper
"Findings...show that, after a three-year plateau, costs decreased by 3.6 percent from 2007 to 2008, marking a pivotal year for the American solar industry," said the report (PDF).
Broken down into real 2008 dollars, the report estimated that the actual cost of installing photovoltaic solar systems--excluding tax credits or financial incentives--was $10.80 per watt in 1998 versus $7.50 per watt in 2008. That initial cost to the installer dropped significantly once incentives and tax credits were factored in. Last year, the average cost of installation was $2.80 per watt for residential photovoltaic, when incentives and tax credits are counted, and $4.00 per watt for commercial.
[Read More via CNet]