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Home Battery Cost Calculator

Estimate what a home battery backup costs to install: from usable capacity and the installed price per kWh, plus the gateway, electrical, and permit work. See the cost per kWh, how many Powerwall-class units it works out to, and the price net of any rebate you qualify for.

kWh
$
$
$
Battery spec in Ah? Convert to kWh
Ah
V
= 5.12 kWh

A typical home battery (Powerwall-class) is about 13.5 kWh and runs roughly $1,000–$1,400 per kWh installed. The cost per kWh and install adder are editable: match a real quote. Enter the rebate you actually qualify for; incentives change.

Installed cost

$18,700

≈ $1,385/kWh · 1 unit of 13.5 kWh

Battery equipment
$16,200
Install, electrical, permit
$2,500

A planning estimate, not a quote. Real pricing depends on the battery brand, whether you need a backup gateway or panel work, and your installer. Pairing a battery with solar can change which incentives apply: get itemized quotes.

Frequently asked questions

Most home batteries run roughly $1,000–$1,400 per kWh installed, plus a few thousand dollars for the backup gateway, electrical work, and permit. A single Powerwall-class unit (about 13.5 kWh) commonly lands around $12,000–$18,000 installed; two units roughly double the battery portion. The calculator on this page estimates it from your own capacity and price per kWh.

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A whole-home battery is one end of the range. Portable power stations cover the essentials for a fraction of the install cost. See the portable power station picks.

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WattSimple. (2026, June 26). Home Battery Cost Calculator. https://wattsimple.com/calculators/home-battery-cost

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Sources & standards

This tool's methodology and data follow US standards and authoritative public datasets: