Denver Post: Ilan Caplan took the plunge last December and had 14 solar panels installed on the roof of his 2,900-square- foot home in Lowry. The 2.87-kilowatt photovoltaic system — enough to generate about 75 percent of his family’s power needs — cost about $9,000 after rebates from Xcel Energy. He also received a $2,000 tax credit from the federal government. Caplan has saved nearly $1,000 on utility bills and estimates that the cost of the system will be recovered in just more than …