California's rooftop solar industry spent much of 2023 and 2024 in open conflict with the California Public Utilities Commission (CPUC) over regulatory changes that sharply reduced the financial value of home solar. The industry, backed by environmental and consumer groups, challenged the changes through lawsuits and public campaigns, arguing that the policy shift undermined the state's clean energy goals.

What Changed

In late 2022, the CPUC approved a new compensation structure for rooftop solar, widely known as the Net Billing Tariff or NEM 3.0. The rule took effect in April 2023 and replaced the earlier Net Energy Metering program (NEM 2.0).

Under the new structure, homeowners who export solar electricity to the grid receive credits at a rate roughly 75% to 80% lower than the prior level. That change dramatically reduced the payback math for new residential solar systems and shifted the industry toward solar-plus-battery installations, where stored energy is used on-site during peak evening hours rather than exported at a reduced price.

Market Slowdown

The market reaction was swift. Rooftop solar sales fell by 66% to 83% in 2023 compared with the same period a year earlier. Industry analysts projected that California's overall solar market would shrink by 36% in 2024, with residential installations hit hardest.

Job losses followed. State solar and storage companies eliminated or planned to cut about 17,000 jobs by the end of 2023, equivalent to roughly 22% of all solar jobs in the state. More than half of contractors surveyed expected further layoffs. Many installer companies, some of which had been in business for more than a decade, scaled back or closed entirely.

Industry Arguments

Industry groups, including the California Solar and Storage Association, argued that the CPUC's analysis undervalued the benefits that rooftop solar delivers to the grid and to society. Rooftop solar reduces line losses, cuts peak demand, and avoids transmission and distribution costs that utility-scale solar does not.

Critics of the CPUC framework also argued that the cost-shift argument used to justify the rate cuts, that solar customers shift costs onto non-solar customers, was overstated and ignored the benefits of reduced peak demand. The industry contended that the CPUC's approach would slow clean energy deployment precisely when California needed more, not less, local generation.

Legal Challenges

Environmental groups, including the Center for Biological Diversity, The Protect Our Communities Foundation, and the Environmental Working Group, filed suit against the CPUC over the ratemaking decision. The litigation moved through state appeals courts, with the California Supreme Court eventually ordering the 1st District Court of Appeal to reconsider certain issues.

In a later decision, the 1st District Court of Appeal sided with the CPUC and upheld the Net Billing Tariff. That ruling was a setback for the industry, though legal and legislative paths to revisit elements of the policy remained under discussion.

Legislative Efforts

Legislators introduced bills aimed at restoring some elements of the earlier solar rules, particularly for renters, schools, and farmers who were affected by related changes to multi-meter solar compensation. Some of those bills advanced, only to be vetoed or stalled.

Meanwhile, other proposals appeared that would retroactively change the terms of older solar contracts. Those proposals drew strong opposition from rooftop solar owners and from the industry, which warned of damage to consumer trust in long-term renewable investments. Eventually, major moves to break existing solar contracts were defeated or shelved.

Shift to Storage

Amid the regulatory upheaval, the market shifted toward solar plus battery storage. Under the Net Billing Tariff, selling power back to the utility at a reduced rate became less attractive than storing energy for evening use, when retail electricity prices peak.

By late 2024, roughly 73% of solar shoppers in California expressed interest in energy storage, with around 45% selecting quotes that included batteries. That shift protected new customers' savings, but it also raised upfront system costs, making solar a harder sell for households with less financial flexibility.

Consumer Considerations

For California homeowners considering solar today, several realities drive project design. Batteries are often essential to achieving strong savings. System sizing must account for the reduced export compensation, which usually means smaller arrays aimed at self-consumption rather than large systems sized to export.

Consumer protection has also become more important. The CPUC, the Contractors State License Board, and the California Solar and Storage Association all provide resources for consumers to evaluate installers, check contract terms, and avoid predatory sales practices. High-pressure sales tactics remain a concern in some parts of the market.

Grid Reliability Debate

One of the underappreciated aspects of the solar dispute has been its intersection with grid reliability. California has faced repeated stress on its electricity system during heat waves, with officials urging conservation to avoid rolling blackouts. Rooftop solar, paired with batteries, directly supports grid reliability by shifting demand off the strained system during peak hours.

Solar advocates have used those reliability events to argue that the state should be encouraging more, not less, customer-sited generation. Utility and CPUC counterarguments have centered on rate fairness and on the role of utility-scale resources.

Looking Ahead

California's rooftop solar debate is not over. Lawsuits, legislative proposals, and CPUC rulemakings continue. The industry has adjusted, with more focus on batteries, bigger systems, and commercial-scale installations, but residential installer counts remain well below the pre-change peak.

For homeowners, the takeaway is that solar can still produce meaningful savings, but the math is different than it used to be. Careful modeling with a reputable installer, clear attention to battery sizing, and close reading of contract terms are now essential parts of any California solar decision.

California Rooftop Solar Industry Challenges Utilities Commission