California's NEM 3.0 policy changed the solar economics in 2023. Here's what still works — the SGIP battery rebate, the property tax exclusion — and how to maximize your savings under the new net billing rules in 2026. Note: the 30% federal ITC expired December 31, 2025.
California has the most mature solar market in the country — and also one of the most complex incentive landscapes. The state's NEM 3.0 net metering policy, which took effect in April 2023, significantly changed the economics of solar for new installations. Understanding what changed, what still works, and how to optimize your system is essential before going solar in California in 2026.
California Solar Incentives Overview (2026)
| Incentive | Value | Who Qualifies |
|---|---|---|
| Federal ITC (30%) | Expired Dec 31, 2025 — no longer available for 2026 purchases | — |
| CA Property Tax Exclusion | 100% of added home value | All CA homeowners |
| CA Sales Tax Exemption | Partial (varies by county) | Most CA homeowners |
| SGIP Battery Storage Rebate | $0.15–$0.25/Wh | PG&E, SCE, SoCalGas customers |
| MASH / SASH Programs | Up to $3/watt | Low-income / affordable housing |
| NEM 3.0 Net Billing | Avoided cost rate (reduced) | New installations after Apr 2023 |
Federal Solar Tax Credit — 2026 Update
The 30% federal residential solar tax credit (Section 25D) expired December 31, 2025. Homeowners purchasing systems in 2026 no longer qualify. Solar leases and PPAs are the exception — the installer can claim commercial credits and pass savings through in the monthly rate. See the IRS Residential Clean Energy Credit page for the official guidance.
California's SGIP battery rebate, property tax exclusion, and NEM 3.0 net billing credits are now the primary financial drivers for 2026 buyers.
California Property Tax Exclusion
California's Active Solar Energy System property tax exclusion (Revenue and Taxation Code § 73) exempts the added value of a solar installation from your property tax assessment through January 1, 2027. Solar panels typically add $20,000–$30,000 to a California home's value, so this exclusion saves hundreds of dollars per year in property taxes.
The exclusion is not automatic — you must file a claim with your county assessor. Contact your county assessor's office after installation.
NEM 3.0 — What Changed in 2023
This is the most important thing California homeowners need to understand in 2026. The California Public Utilities Commission replaced NEM 2.0 with NEM 3.0 (Net Billing Tariff) in April 2023. The key change:
- NEM 2.0 (old): Excess solar generation credited at the full retail rate (~$0.28–$0.35/kWh for PG&E customers)
- NEM 3.0 (new): Excess solar generation credited at the avoided cost rate (~$0.05–$0.08/kWh)
This dramatically reduces the value of exporting power to the grid. Under NEM 3.0, the optimal strategy shifts from maximizing export to maximizing self-consumption — either by shifting loads to daytime (EV charging, dishwasher, laundry) or by adding battery storage.
NEM 2.0 grandfathering: Homeowners who interconnected before April 15, 2023 are grandfathered on NEM 2.0 for 20 years from their original interconnection date.
SGIP Battery Storage Rebate
California's Self-Generation Incentive Program (SGIP) offers rebates for home battery storage. For residential customers:
- Standard rebate: $0.15–$0.20 per watt-hour of storage capacity
- Equity/low-income rebate: $0.25 per watt-hour
On a 13.5 kWh Tesla Powerwall, the standard rebate is approximately $2,025–$2,700. SGIP rebates are available through PG&E, SCE, and SoCalGas territories. Check SGIP's website for current availability — the program has capacity limits and waitlists.
Under NEM 3.0, battery storage is especially valuable because it allows you to store excess midday solar generation and use it in the evening when grid rates are highest.
California Solar Savings Estimate (NEM 3.0)
For a typical Southern California home using 900 kWh/month:
- System size needed: 6–8 kW
- Gross system cost (solar only): $24,000–$30,000
- Federal ITC (30%): Expired Dec 31, 2025 — not applicable for 2026 purchases
- Net cost (no federal ITC): ~$24,000–$30,000 before other incentives
- Monthly bill savings (NEM 3.0, self-consumption optimized): $80–$120
- Simple payback period: 10–14 years
- 25-year savings: $20,000–$35,000
Adding a battery (e.g., Powerwall at ~$12,000 before incentives) can improve economics under NEM 3.0 by increasing self-consumption and reducing evening grid purchases.
Use our free solar savings calculator to model your specific California situation.
Best California Cities for Solar
- Los Angeles — highest electricity rates in SCE territory, excellent sun, massive installer market
- San Diego — SDG&E territory, highest rates in the state (~$0.40/kWh), strong solar ROI despite NEM 3.0
- San Jose / Bay Area — PG&E territory, high rates, tech-savvy homeowners, strong battery adoption
- Sacramento — SMUD territory (municipal utility with its own solar programs, not subject to NEM 3.0)
- Fresno — Central Valley, highest sun hours in the state, lower system costs than coastal cities
- Riverside / San Bernardino — Inland Empire, SCE territory, high sun, lower labor costs than LA
Explore solar options by city: Los Angeles, CA · San Diego, CA · San Jose, CA · Sacramento, CA · Fresno, CA
How to Maximize Solar Value Under NEM 3.0
1. Size for self-consumption, not export — a system sized to cover 80–90% of your usage with minimal export performs better under NEM 3.0 than an oversized system
2. Consider battery storage — a Powerwall or similar battery lets you shift solar generation to evening peak hours, dramatically improving economics
3. Shift loads to daytime — EV charging, dishwasher, laundry, and pool pumps run during peak solar production hours reduce your grid purchases
4. File for property tax exclusion — contact your county assessor after installation
5. Check SGIP eligibility — California's Self-Generation Incentive Program provides battery storage rebates (the federal ITC expired December 31, 2025)
Frequently Asked Questions
Is solar still worth it in California under NEM 3.0?
Yes, but the economics are different from NEM 2.0. Under NEM 3.0, the key is maximizing self-consumption rather than exporting to the grid. Homeowners who shift loads to daytime and/or add battery storage can still achieve payback periods of 10–14 years and 25-year savings of $20,000–$35,000. San Diego homeowners with SDG&E's high rates (~$0.40/kWh) often see the best economics.
What is the California solar property tax exclusion?
California's Active Solar Energy System exclusion (Revenue and Taxation Code § 73) exempts the added value of a solar installation from your property tax assessment through January 1, 2027. Unlike some states, this exclusion is not automatic — you must file a claim with your county assessor after installation.
What is the SGIP battery rebate in California?
The Self-Generation Incentive Program (SGIP) offers $0.15–$0.20 per watt-hour for home battery storage in PG&E, SCE, and SoCalGas territories. On a 13.5 kWh Powerwall, that is approximately $2,025–$2,700. Low-income customers qualify for a higher $0.25/Wh rate. SGIP has capacity limits — check selfgenca.com for current availability.
What changed with NEM 3.0 in California?
NEM 3.0 (Net Billing Tariff), effective April 2023, reduced the credit rate for excess solar generation exported to the grid from the retail rate (~$0.28–$0.35/kWh) to the avoided cost rate (~$0.05–$0.08/kWh). Homeowners who interconnected before April 15, 2023 are grandfathered on NEM 2.0 for 20 years. New installations must optimize for self-consumption rather than export.
Does California have a state solar tax credit?
No. California does not have a state income tax credit for solar. The primary incentives are the property tax exclusion, the SGIP battery rebate, and NEM 3.0 net billing credits. Note: the 30% federal ITC expired December 31, 2025.
Get free quotes from vetted California solar installers at SunLynk and use our solar savings calculator to model your NEM 3.0 savings.
