Federal Battery Rebates Will Reduce from 1 January 2027
What South Australian homeowners and small-business owners planning a battery installation need to know about the Australian Government’s Cheaper Home Batteries Program.
What the January 2027 rebate reduction means for property owners
Although commonly described as a federal battery rebate, the Australian Government’s Cheaper Home Batteries Program provides an upfront discount through small-scale technology certificates, commonly called STCs. Eligible households and businesses may receive this support when installing a qualifying solar-connected battery system. [3]
The STC factor is fixed for each scheduled installation period. It reduces from 6.8 to 5.7 on 1 January 2027, followed by a further reduction to 5.2 on 1 July 2027.
For property owners already considering a battery, completing a suitable and eligible installation during 2026 will generally provide more support than completing the same installation during 2027.
Where installation during 2026 is not practical, completing the installation at the earliest suitable and convenient time between January and June 2027 will generally provide more support than waiting until the next reduction begins in July.
Timing matters, but it should not replace proper system assessment. A battery should still be selected around the property’s actual energy use, existing solar system, tariff structure, electrical requirements and longer-term goals.
What changes on 1 January 2027?
The number of STCs an eligible battery installation can create is partly determined by the STC factor applying at the time of installation.
The factor reduces over time as battery costs are expected to decline. For installations being planned now, the relevant factors are:
| Eligible installation period | STC factor |
|---|---|
| 1 May to 31 December 2026 | 6.8 |
| 1 January to 30 June 2027 | 5.7 |
| 1 July to 31 December 2027 | 5.2 |
Source: Clean Energy Regulator [1].
Further scheduled reductions currently continue every six months until the end of 2030. [1]
In practical terms, the same eligible battery capacity will generally create fewer STCs after 31 December 2026 and fewer again after 30 June 2027.
This does not mean every customer will experience the same fixed dollar reduction. The exact difference depends on factors including the battery’s eligible usable capacity, the number of certificates created and the value applied to those certificates.
Broad claims that every battery receives an identical percentage or fixed rebate amount should therefore be treated cautiously.
Which date determines the support level?
The applicable support level is determined by the STC factor applying on the date the battery is installed.
Under the program, a battery is considered installed from the date its certificate of electrical compliance—or the relevant state or territory equivalent—is issued. [2]
This is an important distinction. Accepting a quotation, paying a deposit, ordering equipment or reserving an installation date does not, by itself, secure the STC factor applying at that time.
To receive the factor applying during 2026, the battery must be properly installed and certified within the applicable 2026 period and satisfy the program’s eligibility requirements.
Property owners considering a late-2026 installation should ask whether the proposed schedule allows sufficient time for:
- property and energy assessment
- system design
- equipment availability
- installation
- commissioning
- electrical certification.
The quotation should also explain what happens if installation or certification moves into a later STC period.
Paying a deposit, ordering equipment, reserving a battery or scheduling an installation does not by itself guarantee the support level applying during 2026.
How battery size affects the calculation
The Cheaper Home Batteries Program supports eligible battery systems between 5 kWh and 100 kWh in nominal capacity.
Nominal capacity is the total amount of energy a battery can store when fully charged. Usable capacity is the amount that can actually be discharged for use by the property.
However, STCs are only available for the first 50 kWh of new or added usable capacity. [1]
Since 1 May 2026, the applicable STC factor has also been tapered across three usable-capacity bands:
| Eligible usable-capacity band | Portion of applicable factor |
|---|---|
| 0 kWh to 14 kWh inclusive | 100% |
| Each kWh above 14 kWh and up to 28 kWh | 60% |
| Each kWh above 28 kWh and up to 50 kWh | 15% |
| Capacity above 50 kWh | No additional battery STCs |
Source: Clean Energy Regulator [1].
For a battery with more than 28 kWh of eligible usable capacity, the calculation is divided into the following parts:
- The first 14 kWh receives 100% of the applicable factor.
- The next 14 kWh receives 60% of the applicable factor.
- Eligible capacity above 28 kWh receives 15% of the factor.
- No additional battery STCs apply above 50 kWh of usable capacity.
The taper does not prevent an eligible battery system from having up to 100 kWh of nominal capacity. It changes how support is calculated across the higher usable-capacity bands.
This is why a broad statement such as “around 30%” should not be interpreted as a guaranteed discount for every battery size or quotation.
Who may be eligible?
The main system requirements include:
- a new battery system between 5 kWh and 100 kWh nominal capacity
- connection to a new or existing eligible solar PV system
- a solar PV system of no more than 100 kW
- a battery system and inverter included on the relevant Clean Energy Council approved-product lists
- an on-grid battery system, including the inverter, that is technically capable of participating in a virtual power plant
- installation by, or with the required on-site supervision of, a Solar Accreditation Australia accredited battery installer
- compliance with applicable electrical safety and installation requirements.
VPP participation is not required to receive support under the program.
Sources: Clean Energy Regulator [1]; Department of Climate Change, Energy, the Environment and Water [2].
A quotation or preliminary property assessment should not be presented as final confirmation that an STC claim will be approved. Eligibility depends on the completed installation, approved equipment and supporting documentation.
Is it better to install during 2026?
For a property owner who has already determined that a battery is appropriate, completing an eligible installation before 31 December 2026 will generally produce more STCs than completing the same eligible installation during 2027.
The highest factor across the periods currently relevant to property owners planning an installation.
A practical alternative where completion during 2026 is not suitable or convenient.
The second scheduled 2027 reduction applies from 1 July 2027.
The support reduction does not mean property owners should rush into an unsuitable battery solely to meet a deadline.
Before proceeding, the proposed system should be assessed against:
- the property’s electricity consumption
- when electricity is used throughout the day
- the existing solar system and inverter
- the electricity tariff structure
- available installation space
- single-phase or three-phase electrical supply
- blackout-support requirements
- expected future requirements, including an electric vehicle
- system warranties
- estimated savings and payback assumptions.
Where installation during 2026 is not convenient, beginning the assessment process early can help determine whether the first half of 2027 is a suitable alternative before support reduces again on 1 July.
Questions homeowners and small businesses should ask
Before accepting a battery quotation, ask:
What are the nominal and usable capacities of the proposed battery?
How many STCs has the quotation assumed?
Which installation period and STC factor have been used?
Is the STC discount shown separately from the underlying system price?
What happens to the price if installation is delayed into the next support period?
Is the battery and inverter currently included on the relevant approved-product lists?
Will an appropriately accredited installer complete and supervise the required work?
How was the battery size matched to the property’s actual energy requirements?
What savings, energy benefits and payback assumptions have been used?
What warranties apply to the battery, inverter and installation workmanship?
Support timing is one part of a suitable battery decision
The 1 January 2027 reduction creates a genuine timing consideration for South Australian property owners already planning a battery installation.
Completing an eligible installation during 2026 will generally provide more federal support than installing the same eligible capacity during 2027. Completing during the first half of 2027 will generally provide more support than completing after the next reduction on 1 July 2027.
Practical Power Solutions reviews the property’s electricity bills, energy-use pattern, tariff structure, existing solar system and household or business requirements before recommending a battery configuration.
Important information and references
The Cheaper Home Batteries Program, STC calculations, certificate values and eligibility requirements may change. The final number and value of STCs can only be established using the program rules, eligible system details and installation date applying to the completed installation.
Practical Power Solutions recommends confirming the support calculation, product eligibility and proposed completion period before accepting a quotation.
- Clean Energy Regulator. (2026). Solar batteries . Australian Government. Accessed 28 July 2026.
- Department of Climate Change, Energy, the Environment and Water. (2026). Eligibility information for the Cheaper Home Batteries Program . Australian Government. Accessed 28 July 2026.
- Department of Climate Change, Energy, the Environment and Water. (2026). Cheaper Home Batteries Program . Australian Government. Accessed 28 July 2026.
Start with your property’s actual energy requirements
A PPS Energy Assessment can help establish the property’s current energy position, the battery configuration that may be appropriate and the practical steps required before an installation can be confirmed.
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