The commission estimates new homes will cut energy use by more than 50 percent under the solar mandate.
The standards also include updates to ventilation, nonresidential lighting, and heat transfer standards. Consumers may see an added $40 to an average monthly payment but save an estimated $80 on monthly heating, cooling, and lighting bills under the new standards, according to the commission.
In California, solar panels can cost homeowners between $11,928 to $25,340 on average, according to Energy Sage. The new standards would add about $25,000 to $30,000 to the construction costs compared with homes built under 2006's state code, according to the OC Register.