The Federal Solar Tax Credit (ITC) in 2026: What You Get

The federal solar Investment Tax Credit, or ITC, is the single biggest financial incentive for residential solar in the United States. It gives you 30 percent of your total system cost back as a tax credit, which directly reduces your federal income tax liability dollar-for-dollar.

The ITC applies to solar panels, batteries, inverters, installation labor, and permitting costs. It covers grid-tie, off-grid, and hybrid systems. And it remains at 30 percent through the end of 2032, after which it steps down. Here is how it works, what qualifies, and how to claim it.

How the ITC Works

The ITC is a tax credit, not a deduction. A deduction reduces your taxable income. A credit reduces your tax liability directly. If you owe $10,000 in federal taxes and claim a $3,000 solar tax credit, you now owe $7,000. The credit pays your tax bill.

The ITC is non-refundable, meaning it can reduce your tax liability to zero but will not generate a refund beyond that. If you owe $2,000 in taxes and have a $3,000 credit, you use $2,000 and carry the remaining $1,000 forward to next year. The credit rolls forward indefinitely until fully used.

To claim the ITC, you file IRS Form 5695 with your federal tax return. The form calculates your credit based on qualified solar expenses. You attach it to Form 1040 and reduce your tax liability by the credit amount. Most tax software handles this automatically if you enter your solar system cost.

What Qualifies for the ITC?

Qualified expenses include solar panels, inverters, charge controllers, mounting hardware, wiring, and installation labor. Battery storage qualifies if charged primarily by solar. Permits, inspection fees, and sales tax also qualify. Basically, if it is part of the solar system and necessary for it to function, it qualifies.

The system must be installed at your primary or secondary residence in the United States. New construction qualifies. Rentals qualify if you own the property. The system must be new -- used equipment does not qualify. And you must own the system, not lease it. Leased or PPA systems do not qualify because the leasing company owns the equipment and claims the credit.

Off-grid systems qualify just like grid-tie systems. The IRS does not care whether you connect to the utility or not. As long as the system generates electricity from solar and meets the other requirements, you get the credit.

Battery Storage and the ITC

Battery storage qualifies for the ITC if it is charged 100 percent by solar. If your battery charges from both solar and the grid, only the portion charged by solar qualifies. The IRS allows you to claim the full battery cost if you can demonstrate that the battery is primarily charged by solar.

In practice, most residential solar-plus-battery systems qualify for the full credit. The battery charges from solar during the day and discharges at night or during outages. Even if the system occasionally draws grid power to top off the battery, the primary charging source is solar, so the IRS allows the full credit.

This is a significant benefit. Batteries add $5,000 to $15,000 to system cost, and the 30 percent credit cuts that by $1,500 to $4,500. Without the ITC, battery storage would be much less affordable. With it, solar-plus-battery systems are cost-competitive with grid-tie-only systems under NEM 3.0.

ITC Step-Down Schedule

The ITC is currently 30 percent for systems placed in service before January 1, 2033. On that date, it drops to 26 percent. In 2034, it drops to 22 percent. In 2035 and beyond, the residential credit expires entirely unless Congress extends it.

Placed in service means the system is installed and operational, not just contracted or purchased. If you sign a contract in 2032 but the system is not installed until 2033, you get 26 percent, not 30 percent. The clock runs on when the system goes live, not when you place the order.

This creates a deadline. If you are considering solar, installing before the end of 2032 locks in the 30 percent credit. Waiting until 2033 costs you 4 percent of the system cost, or $400 per $10,000 spent. For most homeowners, that is reason enough to act sooner rather than later.

How to Claim the ITC

You claim the ITC on your federal tax return for the year the system is placed in service. If your system goes live in 2026, you claim the credit on your 2026 tax return filed in early 2027. The credit applies to the year of installation, not the year you paid for it.

To claim, you need documentation: the final invoice showing total system cost, proof of payment, and a statement from your installer confirming the system is operational. VoltSol provides all required documentation at system completion. You or your tax preparer enter the total cost on IRS Form 5695, calculate the credit, and apply it to your tax liability.

If your tax liability is less than the credit amount, the unused portion carries forward to future years. There is no limit on how many years you can carry it forward. If you owe $2,000 per year in federal taxes and have a $9,000 credit from a $30,000 system, you use $2,000 per year for the next four to five years until the credit is exhausted.

State and Local Incentives

California does not currently offer a statewide solar rebate, but some local utilities and municipalities offer incentives for battery storage or low-income solar programs. SMUD, for example, has offered battery incentives in the past. Check with your local utility or county for current programs.

Property tax exclusion is another California benefit. Solar systems are excluded from property tax reassessment, meaning your property taxes do not increase even though the system adds value to your home. This is automatic and requires no application.

The federal ITC is the biggest incentive by far. Combined with California property tax exclusion and increasing utility rates, the financial case for solar is stronger than ever. VoltSol helps customers identify all available incentives and maximize total savings.

Example: $10,000 System After ITC

A VoltSol off-grid system costs $10,000 installed. You pay the full amount upfront or finance it. At tax time, you claim a $3,000 ITC (30 percent of $10,000). If you owe $5,000 in federal taxes, the credit reduces your liability to $2,000. You either get a bigger refund or owe less.

If you owe less than $3,000 in taxes, you carry forward the unused credit. Say you owe $2,000 this year and $2,500 next year. You use $2,000 in year one, $2,500 in year two, and the remaining $500 in year three. Eventually you get the full $3,000 back, just spread over multiple years.

Net cost after the ITC is $7,000. At current Northern California utility rates, the system saves $200 to $300 per month. Payback is 2 to 3 years. After that, your electricity is free for the next 20+ years.