Get an illustrative price range for a home battery from its usable capacity and installation type, plus extra site work, to sanity-check installer quotes.
Use this estimator to see whether a battery quote sits in a plausible range before you compare the fine print. All price ranges are illustrative assumptions for testing quotes, not market data: prices vary by brand, chemistry, inverter, site and state, and have moved quickly since the federal discount began.
Formula. Lower estimate = usable kWh × lower price per kWh + extra site work. Higher estimate = usable kWh × higher price per kWh + extra site work. Enter the expected federal discount (and any state incentive) as a negative amount in the extra-work box to see the price after incentives, or leave it at zero to see the gross price.
Worked example (illustrative). A 13.5 kWh AC-coupled battery at $800–$1,300 per kWh is $10,800–$17,550 before incentives. Add a $1,200 switchboard upgrade and subtract an estimated $3,200 discount: enter −$2,000 as extra work, giving about $8,800–$15,550 after the discount.
Use usable capacity. Quotes may show nominal and usable capacity; the STC discount and your evening needs both depend on usable kWh. Ask the installer to state it in writing.
Limits. The estimator does not price extended warranties, monitoring subscriptions, VPP sign-up credits or finance charges. Compare at least three written quotes using the quote comparison guide.
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