California’s Landmark Solar Homes Mandate Lowers Cost of Home Ownership

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Originally published at ilsr.org.

Starting January 1, 2020, every new home built in California will sport solar panels. The landmark ruling of the state’s Energy Commission is expected to lower the monthly cost of home ownership by $40, as the energy savings from solar (and other building envelope measures) added to new construction offsets the anticipated costs.

The savings add up over time. Over the term of a typical 30-year mortgage, a new homeowner in California could be expected to save over $14,000.

The impetus to drive distributed solar has other significant benefits. In a study by Crossborder, researchers noted that about one-quarter of residential solar project costs — for customer acquisition, installation labor, permitting and interconnection, and permit fees — are spent locally. In a post earlier this spring, we illustrated how–combined with the reduction in home energy consumption — the local economic value of distributed solar projects are a better deal than large-scale solar to the utility customer. And that’s without including significant cost reductions from including solar in a new home build, rather than as a retrofit.

On the one hand, many of these costs will be reduced or eliminated (no customer acquisition costs at all!). On the other hand, what remains of these expenses will recirculate in the local economy.

The benefits could be big for the electric grid, as well. One in 5 solar arrays installed by Sunrun in California now sports energy storage, and the combination allows solar to continue to cut into the state’s peak energy demand periods. As the state moves toward its electric vehicle goal, home rooftop solar can provide daytime charging capacity without expensive transmission upgrades.

Given the widespread benefits for homeowners, the grid, and the environment, the only question is “who’s next?”

For timely updates, follow John Farrell or Marie Donahue on Twitter or get the Energy Democracy weekly update. Also check out over 50 episodes of the Local Energy Rules podcast!

Photo credit: Thomas Hart via Flickr


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John Farrell

John directs the Democratic Energy program at ILSR and he focuses on energy policy developments that best expand the benefits of local ownership and dispersed generation of renewable energy. His seminal paper, Democratizing the Electricity System, describes how to blast the roadblocks to distributed renewable energy generation, and how such small-scale renewable energy projects are the key to the biggest strides in renewable energy development.   Farrell also authored the landmark report Energy Self-Reliant States, which serves as the definitive energy atlas for the United States, detailing the state-by-state renewable electricity generation potential. Farrell regularly provides discussion and analysis of distributed renewable energy policy on his blog, Energy Self-Reliant States (energyselfreliantstates.org), and articles are regularly syndicated on Grist and Renewable Energy World.   John Farrell can also be found on Twitter @johnffarrell, or at jfarrell@ilsr.org.

John Farrell has 518 posts and counting. See all posts by John Farrell