Net Metering: Doubling California’s Solar Energy Goal

The California net metering battle has come to an end–til 2015 at least–and will raise California’s maximum roof-top solar capacity from the current 2,400 megawatts to about 5,200 megawatts.

The state Public Utilities Commission (PUC) voted on Thursday to make a technical tweak in the way it calculates how many electricity rate payers can participate in the net metering program. This tweak includes residential, commercial, and government buildings whose excess solar power gets sent back to the grid, giving the solar user a lower bill.

In the simplest terms, net metering enables solar users to get credit for the electricity generated by their solar system when their overall usage is low (i.e. when you’re not home during the day). This credit can then be used towards their bill when they’re using electricity but their solar is not generating (at night, when the sun’s not shining).

The daytime solar generation – nighttime usage = a lower bill.

Net metering gives solar owners an element of predictability. Based on the credits received for the solar contributed to the grid, a homeowner can project the savings they’ll incur over the life of their solar system (25+ years).

The net metering issue has been under scrutiny recently as the PUC was gearing up to vote on how to calculate a cap on net metering eligibility. Consumers and utilities opposed to net metering argued expanding the program would create unfair subsidies for wealthy people who can afford to install solar in the first place and shifting costs to non-solar customers who either can’t afford solar or don’t want it.

A 3-year-old PUC study estimated the amount paid by non-solar customers to be $140 million annually to cover the net metering program for their solar owning neighbors. But a more recent study done by Berkeley energy consultant, R. Thomas Beach, concludes that the benefits of using solar (decreasing fossil fuel dependence, decreased carbon dioxide emissions) outweigh the subsidy costs.

Net metering is a very important driver of residential solar adoption. As it is, California’s solar industry employs more then 25,000 workers and provides a clean, renewable source of energy to homes and businesses.

After the extension of the net metering program, PUC  President Michael Peevy announced, “Today’s decision ensures that the solar industry will continue to thrive for years to come, and we are fully committed to developing a long-term solution that secures the industry in California.”


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