“California’s recently approved solar roof mandate for all new homes came as a surprise to many people — even though stakeholders have been working on the rule change for roughly two years.
The latest round of standards, which take effect in 2020, do enable some pretty groundbreaking developments in the advancement of clean energy. Besides the requirement that all new homes under three stories install solar panels — a first for the nation — the codes help to incentivize energy storage and include a host of energy efficiency upgrades that will collectively slash energy use in new homes by more than 50 percent.”
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