In May 2018, California Energy Commission (CEC) voted unanimously to adopt a policy as part of the state’s Building Energy Efficiency Standard, that stipulates that all new residences and major home renovations on buildings under three stories, will be required to incorporate advanced efficiency measures and rooftop solar starting on January 1, 2020.

According to studies conducted by CEC, more than 100,000 new solar homes could be built per year in 2020.

The new standards also encourage demand-responsive technologies, like battery storage to improve building’s thermal envelope and energy savings.