Wall Street Journal: "The California Energy Commission voted 5-0 to approve a mandate that residential buildings up to three stories high, including single-family homes and condos, be built with solar installations starting in 2020."
"The commission expects the cost of adding solar, when combined with other revised efficiency standards, to add about $40 to an average monthly payment on a 30-year mortgage. However it estimates the investment would more than pay for itself, with consumers on average saving $80 a month on heating, cooling and lighting bills."
“'The buyer of that home absolutely gets their money back,' Mr. McAllister said. 'Out-of-pocket, they are actually better off.'”