Battery rebate calculator
See your estimated
battery rebate.
Choose your battery size and installation date.
Your estimated rebate
Your estimate will appear here.
Choose your battery setup, then select See my estimate.
This is an estimate, not a quote. Your installer claims the certificates and takes the value off your quote. You won't receive this as money.
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A little more detail
Your rebate,
explained.
Australia's federal battery rebate works through certificates, not cash. Your installer usually takes their value off your installation price.
How your rebate is calculated
Your rebate depends on the battery's usable capacity and the STC factor when it's installed. For installations from 1 May 2026, capacity is calculated in bands, similar to tax brackets: the first 14 kWh earns the full rate, capacity from 14 to 28 kWh earns 60%, and capacity from 28 to 50 kWh earns 15%. Capacity above 50 kWh earns no additional rebate.
Why bigger isn't proportionally better
From 1 May 2026, because each capacity band earns less, doubling your battery won't double your rebate. Batteries up to 100 kWh can qualify for the program, but only the first 50 kWh earns STCs. Choose a battery based on your household's needs, not simply to maximise the incentive.
There's a minimum too
Batteries under 5 kWh aren't eligible. Eligible batteries can be up to 100 kWh, although the rebate calculation stops at 50 kWh.
Use usable capacity
Enter the battery's usable capacity, not its nominal or headline capacity. Batteries reserve some energy to protect their cells, so usable capacity is usually lower. Both figures should appear on the specification sheet as “nominal” or “rated” capacity and “usable” or “useable” capacity.
Installation timing matters
The STC factor is based on the installation date and falls every six months — in January and July — until the program ends in 2030. The schedule is set in advance, but battery size and how much energy you use each day will usually matter more than timing.
Do I need to claim it?
Usually not. Your installer generally registers the certificates and deducts their value from your installation price. The battery must be on the Clean Energy Council's approved list and installed by an appropriately accredited installer. Grid-connected systems must also be capable of connecting to a Virtual Power Plant, but you don't have to join one. You'll normally sign a form assigning the certificates to your installer.