The 2026 Federal Solar Tax Credit (ITC) Guide for Homeowners

The Residential Clean Energy Credit, formerly known as the Investment Tax Credit (ITC), remains the single most powerful incentive for residential solar in the United States. Under current federal law, homeowners can deduct a full 30% of their total solar installation costs directly from their federal income tax liability. This credit is codified under Internal Revenue Code Section 25D.

Unlike a tax deduction, which simply reduces your taxable income, this is a dollar-for-dollar tax credit. If your solar system costs $20,000 to install, your federal tax credit is $6,000. If you owe $8,000 in federal taxes for the year, your tax bill drops to $2,000. If you owe less than the credit amount, the remaining balance rolls over to the next tax year, as detailed in the U.S. Department of Energy (DOE) Homeowner's Guide to the Federal Tax Credit.

What expenses actually qualify for the 30% credit? The IRS allows you to include: solar PV panels, contractor labor costs for onsite preparation and assembly, system equipment (inverters, wiring, mounting racks), and—critically—stand-alone energy storage batteries with a capacity of 3 kWh or greater. This means your battery backup system is fully eligible for the 30% discount, even if installed without solar.

To claim the credit, you must own the solar system (either purchased with cash or a solar loan). If you lease the solar panels or sign a Power Purchase Agreement (PPA), the solar developer owns the system and receives the tax credit, not you. This is a crucial distinction that installers sometimes gloss over.

Claiming the credit is straightforward: you or your CPA must file IRS Form 5695 (Residential Clean Energy Credits) along with your Form 1040 when filing your federal tax return. Be sure to keep all itemized receipts, invoices, and manufacturer certification statements in your tax records.