California becomes first US state to require solar panels on new homes

NEW YORK/LOS ANGELES  (Thomson Reuters Foundation) - Builders in California will be required to fit solar panels on most new homes from 2020 under new building standards adopted last week, a move that is the first in the United States and could provide a big boost to the solar industry.

The decision, adopted unanimously by the five-member California Energy Commission, is part of the state’s effort to fight global climate change. It came despite estimates it would raise the up-front cost of a new home by nearly $10,000 in one of the most expensive parts of the country.

The Commission estimated the standards will add about $40 to monthly mortgage payments but will compensate for that by saving residents $80 a month on energy bills.

“We cannot let Californians be in homes that are essentially the residential equivalent of gas guzzlers,” Commissioner David Hochschild said ahead of the vote.

The new building codes include updates to building ventilation and lighting standards. They are collectively expected to reduce the state’s greenhouse gas emissions by 700,000 metric tons over three years, a level equal to taking 115,000 cars off the road, according to state officials.

The vote was a major win for the solar installation industry, which already counts California as its biggest market. Demand for solar equipment in California could rise by 10% to 15% because of the new standards, the Energy Commission forecast in a study earlier this year.

Solar companies cheered the move, saying they hoped such requirements would one day be adopted in other states, too.

“We think it’s another example of California policy preceding what will happen in other markets,” Tom Werner, chief executive of San Jose-based solar company SunPower, said in an interview ahead of the decision.