Australia’s appetite for home batteries has exploded. So much so that the Federal Government has confirmed major changes to the Cheaper Home Batteries Program.
From 1 May 2026, the way battery rebates are calculated will change through to 2030. The aim is to keep discounts meaningful for households, while stopping oversized systems from draining the budget. Federal Energy Minister Chris Bowen described the program as a victim of its own success.
“We are managing a program of success and strength. Australians are taking up this program with enormous enthusiasm.”
He also confirmed the Government would step in early. “Today I’m also announcing adjustments going forward to make sure the program continues to be fair and sustainable.”
Why the program is being adjusted
The Cheaper Home Batteries Program has far exceeded original expectations. Uptake has surged as battery prices fall and power bills remain volatile. The Government has now increased estimated funding to around $7.2 billion over four years. This is expected to support more than two million batteries by 2030.
Rather than reduce access, the Government has chosen to reshape incentives. The changes focus on timing and battery size, not eligibility.
What is not changing
Several important settings remain locked in.
- Battery systems up to 100 kWh remain eligible
- Only the first 50 kWh of usable capacity receives support
- Rebates continue to be delivered through STCs
- The STC factor depends on the installation date
In practical terms, batteries are still supported. The calculation method simply becomes more targeted.
The two major changes from 1 May 2026
From 1 May 2026, two key levers change.
- The STC factor declines faster and updates twice yearly.
- The rebate tapers as battery size increases from 0 to 50 kWh.
Together, these changes shift incentives towards typical household systems.
Faster STC factor reductions through to 2030
Under the new settings, the STC factor will drop every six months. This occurs in January and July each year, starting in May 2026.
STC factor changes from 2026 to 2030
| Year | Period | STC factor |
|---|---|---|
| 2026 | Jan to Apr | 8.4 |
| 2026 | May to Dec | 6.8 |
| 2027 | Jan to Jun | 5.7 |
| 2027 | Jul to Dec | 5.2 |
| 2028 | Jan to Jun | 4.6 |
| 2028 | Jul to Dec | 4.1 |
| 2029 | Jan to Jun | 3.6 |
| 2029 | Jul to Dec | 3.1 |
| 2030 | Jan to Jun | 2.6 |
| 2030 | Jul to Dec | 2.1 |
This means batteries installed later receive fewer STCs. The rebate gradually steps down as the program matures.
Battery rebate tapering by battery size
From 1 May 2026, battery size plays a much bigger role. The STC factor will now taper across three capacity bands.
Rebate tapering from 0 to 50 kWh
| Usable battery capacity | STC factor applied |
|---|---|
| 0 to 14 kWh | 100 per cent |
| Over 14 to 28 kWh | 60 per cent |
| Over 28 to 50 kWh | 15 per cent |
This keeps full support for common household batteries. Larger systems receive sharply reduced per-kilowatt-hour support.
What this looks like in the real world
Using the May to December 2026 STC factor of 6.8:
- The first 14 kWh earns 6.8 STCs per kWh
- The next 14 kWh earns 4.08 STCs per kWh
- Capacity above 28 kWh earns just 1.02 STCs per kWh
The bigger the battery, the smaller the marginal rebate. That is exactly what the redesign aims to achieve.
Why the Government chose this approach
The Government says the changes are designed to:
- Maintain an average discount near 30 per cent
- Reflect falling battery costs over time
- Stretch funding through to 2030
- Support grid stability and rooftop solar storage
Bowen also highlighted the broader energy benefit: “Stored rooftop solar via batteries is good for the grid.”
He added a familiar line, “Australia is a solar nation, and we want to match rooftop solar with batteries that cut bills for good.”
What households should consider next
Timing now matters more than ever. The STC factor is locked in on the installation date.
Households should focus on fit, not size.
- Match battery capacity to your usage profile
- Avoid oversizing purely for rebate value
- Model payback carefully for systems above 28 kWh
- Use accredited products and installers
Bigger is no longer automatically better.
Key dates to remember
- Now to 30 April 2026: current rules apply
- From 1 May 2026: new STC factors and tapering begin
- January and July each year: rebates step down again
The Cheaper Home Batteries Program is not ending; it is simply growing up.
