Solar rebate calculator
See your estimated
solar rebate.
Enter your postcode and solar size.
Your estimated rebate
Your estimate will appear here.
Add your postcode, 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.
Adding a battery too? Work out your battery rebate
A little more detail
Your rebate,
explained.
Australia's solar rebate works through certificates, not cash. Your installer usually takes their value off your installation price.
How is this calculated?
Your rebate depends on three things: your solar-panel capacity, your location's sunlight zone, and the number of years remaining in the Small-scale Renewable Energy Scheme (SRES), known as the deeming period. These figures are multiplied together and rounded down to calculate the number of small-scale technology certificates (STCs) your system receives. Sunnier locations generally receive more STCs for the same-sized system.
Do I need to claim anything?
Usually not. Your installer generally registers the STCs and deducts their value from your installation price. You'll normally only need to sign a form assigning the certificates to them.
Why does the installation year matter?
The SRES is scheduled to end after 2030. Each January, the deeming period falls by one year, so the same system receives fewer STCs if installed later.
Acting sooner may increase the rebate, but timing is only one factor. System size, installation cost and how much solar energy you use will usually have a greater effect on the overall financial outcome.
What could change my final rebate?
STCs are traded, so their market value changes. This calculator uses an estimate that you can adjust.
Your installer may use a slightly lower rate to cover trading and administration. If their rate is significantly below the current market value, ask how it was calculated.
What limits your system size?
Your roof isn't the only constraint. System size can also depend on your switchboard, whether you have single-phase or three-phase power, and your distribution network service provider (DNSP).
Your DNSP owns the local poles and wires and sets connection and export limits. These rules vary by area, even within the same state.
Single-phase homes are commonly limited to around 10 kW of inverter capacity. Standard solar inverters can typically support up to one-third more panel capacity than their rated output — for example, 13.3 kW of panels on a 10 kW inverter.
Hybrid inverters may accept more panels because surplus energy can charge a battery, but their limits vary by model.
Three-phase homes generally have more flexibility. An accredited, licensed electrician must confirm the equipment, network and compliance limits for your property.