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Tax Credits & Incentives

Battery Storage Tax Credit: How It Worked — And What Changed in 2026

8 min read min readBy SolarSimple Team

Last updated: 2026-06-16

> IMPORTANT 2026 UPDATE: The federal Section 25D Residential Clean Energy Credit expired for purchased systems on December 31, 2025. There is no 30% federal tax credit for battery storage purchased and installed in 2026 or later. If you installed battery storage before December 31, 2025, you can still claim or carry forward that credit. This article explains how the credit worked, how to claim it on a pre-2026 installation, and what alternatives exist for 2026 purchases.

What the Credit Was — and Who Can Still Claim It

Until December 31, 2025, homeowners could claim a 30% federal tax credit on standalone home battery storage under IRS Section 25D — no solar panels required. The Inflation Reduction Act of 2023 had expanded this to cover grid-charged batteries, a significant expansion.

If you purchased and installed battery storage before December 31, 2025, you can still claim this credit on your federal tax return (or carry it forward if you couldn't use all of it in year one). Nothing about the carryforward rules changed — unused credit from eligible pre-2026 installs carries forward indefinitely.

If you are purchasing battery storage in 2026 or later, the Section 25D credit does not apply. There is no federal residential tax credit for new battery or solar purchases.

How the Credit Worked (For Pre-2026 Installs)

The Residential Clean Energy Credit lives in IRS Section 25D. It was a nonrefundable federal income tax credit — meaning it reduced your tax liability dollar-for-dollar, but you couldn't get a refund check if it exceeded what you owed. Any unused credit carried forward to future tax years.

The credit rate schedule that applied:

  • 30% for systems placed in service through December 31, 2025
  • The IRA had originally scheduled 30% through 2032, then step-downs — but the "One Big Beautiful Bill" of 2025 ended the residential credit for new purchases effective December 31, 2025

On a $15,000 battery installation placed in service before the deadline, that was a $4,500 credit at 30%. On a $20,000 system, it was $6,000. The credit applied to equipment and installation costs — not financing.

What Changed in 2023 (Context)

Before the Inflation Reduction Act of 2023, a battery only qualified under Section 25D if it was part of a solar system and charged at least 75% from renewable energy. A grid-only battery didn't qualify.

The IRA eliminated that sourcing requirement for standalone systems. A battery charged entirely from the grid qualified, provided it met these rules:

  1. Minimum 3 kWh usable capacity — small UPS units don't count
  2. Installed at your primary or secondary residence — rentals don't qualify under 25D
  3. You own the system — leased batteries don't qualify; purchase or finance only

This expanded credit drove significant battery adoption in 2023–2025 before the December 31, 2025 expiration.

Claiming Your Pre-2026 Credit

If you installed before the deadline, here's how to claim:

IRS Form 5695 (Residential Energy Credits), filed with your annual 1040.

What you need:

  • Final invoice from your installer showing itemized costs (equipment + labor)
  • Proof the system was placed in service during the qualifying tax year
  • Total installed cost (labor is creditable, financing interest is not)
  • Documentation of system capacity in kWh (from installer or manufacturer)

You do not need pre-approval or utility registration. State rebates and utility incentives don't eliminate your federal credit eligibility, though they may affect state tax treatment.

Carryforward: If your credit exceeded your tax liability in the year you installed, the remainder carries forward automatically. You enter the prior-year unused credit on next year's Form 5695.

What Happens If You Buy Battery Storage in 2026?

No federal residential tax credit is available for batteries purchased in 2026 or later. Full stop.

State incentives remain available in some areas:

  • California SGIP (Self-Generation Incentive Program): Upfront rebates for battery storage, prioritizing high-fire-risk and low-income areas. Rates vary by utility and funding block. Check cpuc.ca.gov for current availability.
  • New York: ConEdison and PSEG Long Island offer battery incentives in certain territories.
  • Massachusetts MassSave: Offers interest-free loans and some rebates for battery storage in certain programs.
  • Other states: Check DSIRE.org — the Database of State Incentives for Renewables & Efficiency — for current programs in your area.

Lease/PPA for battery storage: If a company owns and installs the battery on your property under a lease or service agreement, they may qualify for the Section 48E commercial ITC — but only if construction begins by July 4, 2026. That deadline is approaching. A leased battery under this arrangement would pass no direct tax credit to you, but the company's tax position may be reflected in lower lease rates.

Common Questions

Does my battery have to be new?

Yes. Refurbished or used systems did not qualify under Section 25D, and the credit no longer applies to new 2026 purchases anyway.

What if I lease the battery?

Leased systems never qualified for the homeowner credit under 25D. The leasing company may (or may not) pass through some benefit in their pricing under Section 48E.

Can I claim it on a vacation home?

Yes — for pre-2026 installs. Section 25D covered both primary and secondary residences. Rental properties you don't personally use did not qualify.

What about state incentives?

Several states have battery-specific rebate programs independent of the federal credit. California, New York, and Massachusetts have the most active programs. Check DSIRE.org for your state.

Can I retroactively claim a battery I installed before 2026 that I forgot to include?

Yes. You can file an amended return (Form 1040-X) within three years of the original filing deadline to claim the credit you missed.

Bottom Line

The federal 30% battery storage credit under Section 25D was a meaningful incentive from 2023 through December 31, 2025. If you installed before the deadline, you can still claim or carry forward that credit on your taxes.

For new battery purchases in 2026, there is no federal residential tax credit. Your options are state incentive programs (where available), a lease/PPA arrangement that may benefit from the commercial 48E credit, or purchasing outright and relying on the financial case for battery storage on its own merits — which, in time-of-use markets and areas with unreliable grid power, can still be strong.

This article is for informational purposes only and does not constitute tax advice. Consult a qualified tax professional for guidance specific to your situation.