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California’s new rooftop solar mandate

Steven Weissman, LEGAL PLANET

The California Energy Commission’s new mandate receives mixed reviews.

The recent decision of the California Energy Commission to require the inclusion of rooftop solar photovoltaics on most new homes has engendered praise from some quarters, and criticism from others. Some see this new policy as a positive force, helping to reduce the cost of solar and contribute to a reduction in greenhouse gas emissions. Others despair policy makers’ tendency to choose technology winners and losers, and argue that the least cost choices are usually the best.

There is no disputing that the state’s new policy is a landmark event that may or may not set the stage for broader solar adoption across the country. Regardless of where you might find yourselves in the cheering section, allow me to offer several red flags to watch for, when considering critical perspectives on the topic of requiring rooftop solar:

1. When someone argues that rooftop solar is foolish because central station solar is cheaper, they are ignoring, or at least minimizing the import of, the difficulty in siting central station solar, the decade-long process of making such a project happen, the direct land use impacts of that technology, the need for more transmission lines and all of the related land-use impacts, the reduced reliability resulting from concentrating so much solar generation in one area as clouds roll by and nighttime falls, the potential of local grid benefits from local generation, and the way onsite generation can contribute to a broader strategy to make the use of energy more efficient and less impactful.