It's been three years since California's CPUC rewrote the rules for rooftop solar, and homeowners are still asking the same question: does solar still pencil out under NEM 3.0? The short answer is yes — but only if you pair panels with a battery. The math changed permanently in April 2023, and the strategies that worked under NEM 2.0 no longer apply.
Disclaimer: Cost estimates are based on EnergySage 2026 Solar Marketplace data and CPUC Decision 22-12-056. Payback periods are illustrative; actual results depend on your utility, roof orientation, usage profile, and installer quotes. Consult at least three licensed California installers before signing a contract.
Key Takeaways
- NEM 3.0 cut export rates by roughly 75%, from ~$0.30/kWh to ~$0.08/kWh (CPUC)
- Solar-only payback is now 9-13 years; solar plus battery drops that to 5-7 years
- No federal Section 25D credit exists in 2026 — it expired December 31, 2025
- SDG&E customers face the highest retail rates in California, making self-consumption especially valuable
- NEM 2.0 legacy customers keep their rate for 20 years from their Permission to Operate date
What Did NEM 3.0 Actually Change?
California's new net metering tariff, effective April 15, 2023 under CPUC Decision 22-12-056, slashed the credit homeowners receive for surplus electricity sent to the grid. The old NEM 2.0 rate averaged roughly $0.30/kWh in export compensation. NEM 3.0 dropped that to roughly $0.08/kWh — a 75% reduction — replacing it with a new "Avoided Cost Calculator" tied to wholesale power prices.
The change affects PG&E, SCE, and SDG&E customers who applied for solar after April 15, 2023. If you're on NEM 2.0 already, nothing changed for you — yet. Your grandfathered rate lasts 20 years from your Permission to Operate date. The last PTO issued under the original NEM 2.0 window would have been in April 2026, so that grandfathering period has now fully closed for new entrants.
What the 75% Export Cut Means in Practice
Under NEM 2.0, a 10 kWh midday export earned you roughly $3.00 against your bill. That same export under NEM 3.0 earns about $0.80. The economic logic of oversizing a solar array to export surplus power is essentially gone. The system that made financial sense was one that exported a lot and earned near-retail credit. That business model no longer exists under NEM 3.0.
The CPUC's stated goal was to reduce the "cost shift" from non-solar ratepayers. Whether it achieved that or simply chilled new solar adoption is a legitimate debate — and one the California Supreme Court may weigh in on, with a ruling on NEM 3.0's legality expected sometime in mid-2026.
Is Solar Still Worth It in California Under NEM 3.0?
Yes, but the value equation is different. Under NEM 3.0, your solar panels are most valuable when they produce electricity your home consumes directly — self-consumption replaces grid export as the primary source of savings. EnergySage's 2026 Solar Marketplace Report puts the median installed cost at $2.49/watt, with the average California system running 11.8 kW, for a total installed cost of roughly $30,505 before any incentives.
Without the federal Section 25D credit (expired December 31, 2025) and with California's HEEHRA rebate fund fully exhausted as of February 24, 2026, homeowners are now paying closer to full price. That raises the stakes on getting the system size and battery decision right.
| Feature | NEM 2.0 Legacy | NEM 3.0 Current |
|---|---|---|
| Export compensation (avg) | ~$0.30/kWh | ~$0.08/kWh |
| Rate basis | Retail avoided cost (near retail) | Wholesale avoided cost (ACC) |
| Who qualifies | Customers with PTO before April 15, 2023 | All new applicants from April 15, 2023 onward |
| Grandfathering period | 20 years from PTO date | N/A — this is the current tariff |
| Battery pairing benefit | Nice to have | Near-essential for strong ROI |
| Optimal system strategy | Oversize to maximize exports | Right-size for self-consumption |
| Approximate solar-only payback | 6-9 years | 9-13 years |
Use our Solar ROI Calculator to run the numbers for your specific utility, usage, and location.
How Does Adding a Battery Change the Payback Math?
A battery storage system changes everything under NEM 3.0. Instead of exporting midday solar surplus for $0.08/kWh, you store it and use it at night — displacing grid power that costs $0.25 to $0.45/kWh depending on your utility. That arbitrage gap is where the financial case for solar-plus-storage is made. According to CPUC and utility rate filings, SDG&E's average retail rate now exceeds $0.40/kWh, the highest of the three NEM 3.0 utilities.
Installers report that NEM 3.0 customers who add a 10–13 kWh battery system see payback timelines compress by 3–5 years compared to solar-only configurations, because the battery converts a low-value export into a high-value grid offset.
| System type | Upfront cost (est.) | Payback years (NEM 3.0) | 25-year savings estimate |
|---|---|---|---|
| Solar only (11.8 kW) | ~$30,500 | 9-13 years | $30,000-$50,000 |
| Solar + battery (11.8 kW + 13 kWh) | ~$42,000-$46,000 | 5-7 years | $60,000-$85,000 |
Estimates assume 3% annual electricity rate escalation, California average sun hours, and no federal Section 25D credit. Individual results will vary. Run your specific scenario with our Battery Storage Calculator.
What About the SGIP Battery Rebate?
California's Self-Generation Incentive Program (SGIP) still offers rebates for battery storage. Income-qualified households can receive $0.20-$0.25/Wh, which on a 13.5 kWh battery amounts to $2,700-$3,375 back. General market rebates are available in smaller amounts through SGIP's equity and storage programs. Check current SGIP availability through your utility before purchasing — funding is released in tranches and can be exhausted between tranches.
Does Your California Utility Change the NEM 3.0 ROI?
Your utility matters more under NEM 3.0 than it ever did under NEM 2.0. All three California investor-owned utilities — PG&E, SCE, and SDG&E — operate on the NEM 3.0 tariff for new applicants. But their retail rates differ significantly, and because self-consumption is now the primary value driver, a higher retail rate translates directly into better ROI on every kilowatt-hour your panels produce and you use immediately.
SDG&E customers are in an unusual position: they face the most pain from NEM 3.0's export rate cuts, but they also benefit most from self-consumption because their retail rates are the highest in the state. For an SDG&E customer, every kWh of solar self-consumed offsets a $0.40+ charge — the same reason battery payback is often 1–2 years shorter for SDG&E customers than for PG&E or SCE customers at similar usage levels.
What About the CA Supreme Court Challenge?
A legal challenge to NEM 3.0 is working its way through the courts. The California Supreme Court accepted review, and a ruling is expected sometime in mid-2026. If the court overturns NEM 3.0 or orders the CPUC to revise the rates, it could affect new systems installed under the current tariff. It's unlikely to retroactively unwind the export rate for systems already installed, but worth monitoring before committing to a large purchase.
What Incentives Are Still Available in 2026?
The incentive landscape thinned out significantly heading into 2026. The federal Section 25D residential solar tax credit expired December 31, 2025 — there's no 30% credit to apply to a new system. California's HEEHRA rebate program (federally funded through the IRA) exhausted its funds on February 24, 2026. What remains:
- SGIP battery rebate — still available for income-qualified buyers at $0.20-$0.25/Wh
- Section 30C EV charger credit (30%) — still active but expires June 30, 2026; applies to EV charger installation, not solar panels
- Section 48E commercial credit — active through 2027 for third-party-owned systems (leases and PPAs) only; does not apply to homeowner-owned systems
- Local utility rebates — vary by territory; check directly with PG&E, SCE, or SDG&E
On an average 11.8 kW system priced at $30,505, the expiration of Section 25D removed approximately $9,150 in federal credit that homeowners previously received. That's a material shift in the economics that most pre-2026 payback calculators don't reflect.
The Section 48E point is important for anyone considering a solar lease or PPA rather than a cash or loan purchase. Under a third-party ownership arrangement, the installer captures the Section 48E credit and typically passes some value back through lower lease rates or guaranteed production. For some households, a PPA may be the most accessible path to solar savings in 2026. See our Solar Lease vs Buy vs PPA Calculator to compare the 25-year ownership cost.
According to EnergySage's 2026 marketplace data, the median installed cost of $2.49/watt reflects a market where panel prices are near historic lows but labor and permitting costs have risen steadily. That means the upfront number is unlikely to fall much further in the near term, and waiting for further price drops is not a reliable strategy for improving ROI.
What Should a California Homeowner Do Right Now?
The decision framework under NEM 3.0 is simpler than it looks. If you consume a meaningful amount of electricity during the day — home office, EV charging, pool pump — solar produces real savings through direct offset. If your household is empty during the day and you export most of your production, the economics are weaker and battery storage becomes more important.
Pull your last 12 months of utility bills.
You need your actual annual kWh usage and your average cost per kWh, not a national average. Your utility's online portal should show both. This number drives every payback estimate.
Estimate your self-consumption ratio.
Under NEM 3.0, the percentage of solar you use directly (vs. export) is the key variable. A household home during the day, with an EV, might self-consume 70-80% of production. A household away all day might self-consume only 20-30%.
Model solar-only vs. solar-plus-battery scenarios.
Use our Solar ROI Calculator to run both scenarios with your actual usage and utility. The difference in 25-year savings often justifies the battery premium.
Get three installer quotes.
Installed costs in California vary by $0.30-$0.60/watt between installers for the same equipment. The EnergySage marketplace is one way to get comparable quotes; you can also contact installers directly.
Check SGIP eligibility before signing anything.
If your household income qualifies for SGIP equity rebates, that $2,700-$3,375 on a battery system can materially shorten your payback. Confirm current availability through your utility before your installer submits permits.
See your NEM 3.0 payback in under two minutes
Enter your utility, monthly usage, and roof details. Results appear on screen — no email required.
Weighing a lease or PPA instead of buying? Our Lease vs. Buy vs. PPA Calculator compares the 25-year cost for each path using your actual rate and local sun hours — including the Section 48E benefit that TPO installers can pass through.
Bottom Line
NEM 3.0 didn't kill California solar. It changed what makes a system worth buying. Solar-only installs still pay back — they just take longer, and the economics favor households with high daytime usage. Solar-plus-battery is the configuration that preserves the strongest ROI under the new tariff, with a payback window of 5-7 years for a well-sized system.
The loss of Section 25D in 2026 and the exhaustion of HEEHRA funds are real headwinds. But retail electricity rates in California — especially at SDG&E — remain among the highest in the country, and that rate environment is the fundamental case for solar regardless of export compensation. Every kilowatt-hour you produce and consume is one you don't buy at $0.30-$0.40+.
Get real quotes, run the numbers with your actual usage, and pay attention to the self-consumption side of the equation. That's where the 2026 California solar decision lives.
Sources
- CPUC Decision 22-12-056 — NEM 3.0 Tariff
- CPUC — Net Energy Metering overview
- EnergySage — Solar Panel Cost Report 2026
- CPUC — Self-Generation Incentive Program (SGIP)
Related Guides
- Is Solar Worth It in 2026? — A national overview of solar ROI, payback periods, and the post-Section-25D cost landscape.
- Solar Panel Financing: Loan vs Lease vs PPA — How to compare ownership structures when there's no federal credit to offset upfront cost.
- Home Battery Storage Cost 2026 — What a battery system actually costs, which incentives apply, and how to size it for NEM 3.0.
- Net Metering Explained by State — How California's policy compares to other states and what to expect if your state is considering similar reforms.
