Home battery savings calculator
Estimate how much a home battery could save you a year, and roughly how long it would take to pay for itself, from its size, your power prices and the cost after rebates.
Based on cycling the battery roughly once a day.
Rough estimate only, for general information and not financial advice. It assumes you store and use close to a full battery most days; real savings depend on your solar size, usage pattern, tariffs and how often the battery fills. Last checked June 2026.
How a battery saves you money
A battery stores your daytime solar so you use it after dark instead of buying from the grid. Each stored kilowatt-hour you use is worth the gap between what you pay to import (often 30 cents or more) and the few cents you would have earned exporting it. That gap, multiplied by how much you cycle the battery, is the saving. The full picture is in is a home battery worth it.
What changes the payback
Payback is faster if you use a lot of power after dark, your feed-in tariff is low, you have enough solar to fill the battery most days, and you grabbed the federal rebate. A virtual power plant can add income on top. See how to choose a battery for the hardware side.
The bottom line
Use this to sanity-check whether a battery stacks up for your home, then get real numbers. A free check like My Home Battery can confirm your rebate and a proper quote.