The Australian Government announced adjustments to the Cheaper Home Batteries Program from 1 May. From 1 May 2026, amendments to the Renewable Energy (Electricity) Regulations 2001 will start.
Use this calculator to estimate the number of small-scale technology certificates (STCs) your solar battery installation may be eligible for based on the current STC factor and future adjustments.
Disclaimer
The calculator:
- determines STCs based on changes from 1 May 2026 as per the amendments to the Renewable Energy (Electricity) Regulations 2001 STC factor
- is a guide only and does not consider all the variables which may affect the calculation of STCs
- is based on data that may be updated, so results can vary over time.
STC factor
The STC factor determines the number of STCs a system is entitled to create per kWh of useable capacity.
| Year | Period | Amended STC factor |
|---|---|---|
| 2026 | January – April | 8.4 |
| 2026 | May – December | 6.8 |
| 2027 | January – June | 5.7 |
| 2027 | July – December | 5.2 |
| 2028 | January – June | 4.6 |
| 2028 | July – December | 4.1 |
| 2029 | January – June | 3.6 |
| 2029 | July – December | 3.1 |
| 2030 | January – June | 2.6 |
| 2030 | July – December | 2.1 |
Amount of support according to system size
From 1 May 2026, the STC factor will taper according to the amount of capacity installed:
- From 0 kWh up to 14 kWh (inclusive): STC factor applied at 100%.
- Every kWh greater than 14 and up to 28 kWh (inclusive): STC factor applied at 60%.
- Every kWh greater than 28 and up to 50 kWh (inclusive): STC factor applied at 15%.
Detailed information on these adjustments can be found on the Department of Climate Change, Energy, the Environment and Water’s website.