In 2020, California's rooftop solar mandate for all newly built single-family homes in the state goes into effect, and experts anticipate it will help normalize the use of solar nationally in residential construction.
California is the first state to have such a mandate in its building codes, applying to its roughly 80,000 new homes built every year. The code also requires greater efficiency measures including thicker insulation and tighter sealing doors, and spurs on developers to add onsite battery storage and solar-powered water-heating systems on the roof. In terms of cost, developers now take on the cost of sourcing and installing the solar array, an average $9,500 per home. In turn, homeowners' have an average $40 added to their monthly mortgage, while saving $80 per month in energy and maintenance costs, Fast Company reports.
Lennar, a residential developer based in California but with projects across the country, already has a formula down. In 2012, Lennar built out a solar subsidiary, SunStreet, which specializes in integrating solar into the home construction process. Rather than retrofitting a solar array onto a roof, which entails an installation and wiring process, SunStreet builds the array into the roof and connects it to the electrical system as the construction is under way. This model, Knutsen says, will be something for builders and solar providers alike to look to as they adapt. David Kaiserman, SunStreet founder and Lennar president, says that his ventures are planning to offer guidance to other developers and solar providers looking to streamline solar integrations going forward.
Advertisement
Related Stories
Energy Efficiency
New Heat Pump Takes a Sleek Approach to Home Climate Solutions
Startup Quilt is putting a fresh face on heat pumps to save homeowners money on their energy bills
Energy Efficiency
Green Upgrade Calculator Brings Clarity to Energy Efficiency
The tool can be used by home contractors, energy advisors, and decarbonization analysts
Energy Efficiency
New Bill Aims to Curb Energy-Efficiency Standards for Home Appliances
Passage of the act by the House would add hurdles to creating new appliance standards and also make it easier to revoke existing standards
