The value of net-metered solar is up for vote in California


Sometime soon – maybe as soon as today – the nation’s largest rooftop solar power market, residing in the state with the most grid-connected solar, will vote on how to financially compensate over 10 gigawatts of installed,  net-metered capacity on homes and businesses. California’s vote will be its third iteration of net metering – NEM-3.

The vote is highly charged. At least 17 parties have submitted opinions backed by financial and legal arguments sent directly to California’s Public Utility Commission (CPUC). The whole of the legal filings – thousands of pages of documents – can be found on the CPUC website.

Various parties are arguing in favor of an 80% reduction to solar’s net-metering value, as well as monthly fees of $75 for homeowners with solar systems attached to the grid. Commercial customers could be facing fees from $800 to $3,400 per month. These fees would negate most of the savings for installing solar power.

Included among the list of groups in favor of strong net metering compensation are the California Solar & Energy Storage Association (CALSSA), the Clean Coalition, the Solar Energy Industries Association (SEIA) and Vote Solar, the California Energy Storage Association, and others. Those submitting proposals that are less supportive of rooftop solar include the Sierra Club, the Natural Resources Defense Council, multiple wind power associations, as well as the power companies.

CALSSA submitted a 255 page document, which outlines their own proposals for NEM-3. They propose a gradual reduction in the export compensation rates, as well as tying those reductions to the achievement of specific adoption targets. They also wish to shield low-income customers and community-owned projects from reductions to their compensation, and they propose that NEM-2 should be retained by all customers who qualify for the various low-income programs offered in California.

Revel Energy’s graphic is based on CALSSA’s estimates of how the value of net metered solar electricity could change as a result of the power company’s suggested NEM 3.0 model.


CALSSA’s submission strongly rejects the pro-transmission parties’ proposals. They point out that these proposals have fatal flaws, including violations of state and federal law, lack of precedent, and the significant impairment to the future of distributed energy resources. They also cite significant consumer protection concerns, the total lack of any transition period, a dramatic reduction in equity for ratepayers, severely extended payback periods, and a failure to understand the realities of the energy storage market.

Analysis from Sage Consulting shows the value of net metered electricity will fall in comparison to the two prior versions of net metering.

Sage notes that part of NEM-3 is the goal of installing more energy storage with solar, rather than solar power on its own. Instead of incentivising energy storage, the more extreme proposals would more closely follow Hawaii’s version of rejecting net metered electricity altogether, with no solar rooftop exports allowed due to the very high solar penetration.

Sage Consulting

The National Resources Defense Council (NRDC) has generally said that they support large scale solar power over rooftop solar because of the higher cost per unit when installing rooftop solar. However, they do support distributed, rooftop solar power.

The group released the graphic below, which shows where their proposal falls into the broader range of submissions versus the current net metering structure.

The driving logic behind the NRDC’s proposal is the “cost shift” argument. The logic is that full credit net metering (NEM 1.0) was originally intended to drive a nascent industry that needed the support – and that was so small that it had little effect on the broader power grid technically or financially. The goal of NEM 2.0 was to refine the system by adding time of use charges for solar, and to adjust the compensation as the volume of solar grew.

The NRDC is now arguing that rooftop solar – along with large scale solar – has reached a point where it is now strong enough, and contains sufficient volume, that the cost shift is becoming real, and is beginning to negatively affect those who have not installed solar power.

Thus their proposal, which they believe “strikes the right balance” between the more extreme proposals of the monopoly utilities and the large scale focused wind companies.

For this author’s opinion, please see our prior pv magazine USA publication.

Note: This was updated to change the installations from  publically owned to home and business owned.

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