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SESK: Stuff Everyone Should Know · sesk.info/solar-irs-battery-3kwh

For the federal credit through 2025, how large did a home battery have to be to qualify?

At least 3 kWh of capacity.

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  1. At least 3 kWh ✔
  2. At least 10 kWh
  3. At least 1 kWh

Why: Battery storage qualified starting in 2023 if its capacity was at least 3 kilowatt-hours. Smaller units did not.

Huh, didn't know that: The battery also had to be installed on a home in the United States.

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Why doesn't a dead battery cost anything? Because it's free of charge.
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References

Answer: At least 3 kWh. Battery storage qualified starting in 2023 if its capacity was at least 3 kilowatt-hours. Smaller units did not.

  1. IRS: Instructions for Form 5695 (2025) www.irs.gov/instructions/i5695
    the qualified battery storage technology must have a capacity of at least 3 kilowatt hours
    Checked 2026-10-10.

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