The Federal Solar Tax Credit Ended in 2026: What California Homeowners Need to Know

For over a decade, the federal residential solar Investment Tax Credit -- Section 25D of the Internal Revenue Code -- gave homeowners 30 percent of their solar system cost back as a direct tax credit. It was the single biggest incentive in residential solar. For 2026 buyers, it is gone.

The July 2025 federal budget law repealed Section 25D for systems placed in service after December 31, 2025. If your system goes live in 2026 or later, the federal ITC does not apply. This is a material change. Here is what it means for you, what incentives remain, and why the financial case for solar is still strong in California.

What Was the 30% Federal Solar Tax Credit? (Ended 2026)

Section 25D was a non-refundable federal income tax credit equal to 30 percent of the total installed cost of a residential solar system -- panels, inverters, batteries, installation labor, and permits. A $10,000 system generated a $3,000 credit that directly reduced your federal tax liability dollar-for-dollar.

The credit was valuable because it was not a deduction -- it reduced actual taxes owed, not just taxable income. Unused credit carried forward to future years. It covered grid-tie, self-consumption, and hybrid systems, and was a major reason solar payback periods were often quoted at 2 to 3 years.

Congress extended the ITC multiple times. The Inflation Reduction Act of 2022 set it at 30 percent until the end of 2032, with a step-down schedule planned for subsequent years. The July 2025 budget law reversed that and repealed the residential credit for systems placed in service after December 31, 2025.

What This Means for 2026 Buyers

If you are buying or planning a solar system in 2026, you cannot claim the Section 25D federal tax credit. The credit eligibility is based on when the system is placed in service -- meaning installed and fully operational -- not when you sign a contract or make a payment.

Systems placed in service on or before December 31, 2025 were not affected. If an installer tells you the 30 percent federal credit still applies to a 2026 install, that is factually wrong. Consult a licensed tax professional if you have questions about your specific situation.

This does not mean solar is a bad investment. It means the payback math changes. The full installed cost is your starting number, with no federal subsidy to offset it. In PG&E territory at 40-plus cents per kWh, avoided utility costs still drive a compelling payback in 3 to 5 years -- no tax credit required.

California Incentives That Still Apply

California's Self-Generation Incentive Program (SGIP) offers rebates on qualifying battery storage systems. SGIP is administered through the state's major utilities and targets storage that reduces grid stress during peak demand. If your system includes a battery, you may qualify for a rebate that lowers your net cost -- ask VoltSol about current SGIP enrollment status during your quote.

California's property tax exclusion for solar still applies. Under Revenue and Taxation Code Section 73, adding a qualifying solar system does not trigger a property tax reassessment. The added home value from your install is excluded from your assessed value, saving you money on property taxes every year for the life of the system.

Some counties and local utilities offer additional incentives for battery storage, EV charging, or low-income solar programs. SMUD has offered battery incentives in the past. Check with your local utility or county for currently active programs -- VoltSol tracks available California incentives and will flag anything you qualify for.

The Real Value Driver: Avoided Utility Costs

Even without a federal tax credit, residential solar + battery storage in Northern California is a strong financial move. PG&E residential rates now exceed 40 cents per kWh in many tiers. A home using 600 kWh per month pays $240 or more every month -- nearly $3,000 per year -- to PG&E. Residential solar + battery storage eliminates that bill entirely.

A $10,000 VoltSol system saving $250 per month pays back in about 3.3 years on avoided utility costs alone. SGIP rebates, if your battery qualifies, may lower your net cost and shorten payback further. After year 4, you are banking $250 per month that used to go to PG&E. That value compounds every year as utility rates keep climbing.

Compare this to staying on the grid under NEM 3.0, which pays a fraction of what NEM 2.0 customers earned for solar exports. Solar + battery storage avoids the utility entirely -- no NEM rate games, no demand charges, no grid outages during PSPS events. You generate, store, and consume your own power.

Example: $10,000 System in 2026 (No Federal ITC)

A VoltSol solar + battery system costs approximately $10,000 installed. There is no federal tax credit to claim for 2026 installs. SGIP may lower your net cost depending on battery eligibility -- VoltSol will assess this during your quote.

Pre-solar PG&E bill: $250 per month, or $3,000 per year. Post-solar bill: $0. Annual savings: $3,000. Payback on the full $10,000: approximately 3.3 years. If SGIP applies, your net cost drops and payback shortens further.

By year 5, you have recouped the full investment. By year 10, you have avoided $30,000 or more in utility costs. By year 20 -- the practical lifespan of the system -- you have avoided $60,000 to $80,000 in utility payments as rates continue rising. The absence of a federal tax credit pushes payback from 2 years to 3 to 4 years. The long-term financial outcome remains compelling.

Property Tax Exclusion: An Ongoing Benefit

California Revenue and Taxation Code Section 73 excludes solar installations from property tax reassessment. When you add solar, your assessed property value does not increase -- even though the system adds real market value to your home. You pay no additional property taxes for the life of the system.

This benefit is automatic and requires no application. It applies to new solar installations and to battery storage systems paired with solar. Over 20 years, this exclusion typically saves homeowners $1,000 to $3,000 in would-be property tax increases.

Combined with SGIP battery rebates and ongoing avoided utility cost savings, the total financial picture for solar in 2026 California remains strong -- just built on different foundations than it was in 2024.