Home battery rebate (STC) calculator
Certificates for your battery size and installation date, and the next step-down.
A battery with 13.5 kWh of usable capacity installed between 1 May 2026 and 31 December 2026 creates about 91.8 small-scale technology certificates (STCs) (factor 6.8 per kWh). Installed from 1 January 2027, the same battery creates about 77.
Certificates (STCs)
91.8
- STC factor for that date
- 6.8
- Size tiers applied
- Yes
- If installed in the next period
- 77 from 1 January 2027
The highlighted bar is the period for the installation date entered.
Show the numbers as a table
| Installed from | STCs |
|---|---|
| Jan 26 | 113.4 |
| May 26 | 91.8 |
| Jan 27 | 77 |
| Jul 27 | 70.2 |
| Jan 28 | 62.1 |
| Jul 28 | 55.4 |
| Jan 29 | 48.6 |
| Jul 29 | 41.9 |
| Jan 30 | 35.1 |
| Jul 30 | 28.4 |
- 0–14 kWh: 91.8 (100%)
- 14–28 kWh: 0 (0%)
- 28–50 kWh: 0 (0%)
Capacity above the first tier earns a reduced share of certificates.
Show the numbers as a table
| Part | Amount | Share |
|---|---|---|
| 0–14 kWh | 91.8 | 100% |
| 14–28 kWh | 0 | 0% |
| 28–50 kWh | 0 | 0% |
How the certificates are counted
| Capacity band | Your kWh in it | Share of factor | STCs |
|---|---|---|---|
| 0–14 kWh | 13.5 | 100% | 91.8 |
| 14–28 kWh | 0 | 60% | 0 |
| 28–50 kWh | 0 | 15% | 0 |
Good to know
- The rebate depends on the installation date, not the date you sign.
- Certificate prices are set by the market, so the dollar value varies. Most buyers receive the value as a discount from the installer.
- Eligibility conditions apply (for example, approved products and accredited installers). Figures here are estimates; the Clean Energy Regulator's calculator is the official tool.
Sources
- Federal Register of Legislation: explanatory statement F2026L00093
- Clean Energy Regulator: Battery rebates are changing 1 May 2026
Figures last checked against official sources: . General information, not financial or tax advice.
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Terms on this page
- AUD · Australian dollars
- All amounts on this site are in Australian dollars unless stated.
- kWh · Kilowatt-hour
- A unit of energy: using 1,000 watts for one hour. Electricity is billed per kWh; battery capacity is measured in kWh.
- STC · Small-scale technology certificate
- A certificate created when eligible solar panels or home batteries are installed. Selling them is how the federal rebate is paid, usually as a discount from the installer.