Rocky Mountain News: The governor and solar industry interests are decrying Xcel’s recent move to reduce its renewable energy credit from $2.50 per watt to $1.50, saying it jeopardizes the installation of some home solar systems, at least in the short run. They may be right, but that clearly is not Xcel’s intent. As the company explained in a letter to the state Public Utilities Commission, the purpose of lowering the credit is to keep the total subsidy – federal and local – at about 50 percent of an …