Australia’s federal battery rebate is set to change from 1 May 2026. These changes affect how the rebate is calculated, how quickly it declines over time, and how battery size influences the level of support available. The rebate itself is not being removed, but the rules that determine its value are evolving.
This article explains what is changing under the federal battery rebate, why the changes are happening, and what households and businesses should consider if they are planning to install battery storage in Australia.
TL;DR
- The federal battery rebate is changing from 1 May 2026, not ending.
- The STC factor used to calculate the rebate is expected to decline more frequently.
- Battery size will matter more, with reduced support applying to additional capacity above key thresholds.
- The installation date affects how much federal support a system can receive.
- Federal incentives can still be combined with state programs, subject to eligibility.
What is the federal battery rebate?
The federal battery rebate is delivered through Small-scale Technology Certificates under the Small-scale Renewable Energy Scheme. Instead of receiving a cash payment from the government, most households receive the benefit as an upfront discount applied by an accredited solar and battery installer.
The rebate applies to eligible battery systems connected to either new or existing rooftop solar. The number of certificates created depends on the battery’s usable capacity and the certificate settings in place at the time of installation.
Important: The federal battery rebate is not a direct cash rebate. It is a certificate-based discount that is usually built into the system price by the installer or retailer.
The key date: What changes on 1 May 2026?
From 1 May 2026, two structural changes are expected to apply to the federal battery rebate across Australia, including in New South Wales, Victoria, Queensland, South Australia, Western Australia, and the Australian Capital Territory.
First, the rate at which the rebate declines over time will accelerate. Second, the way support is applied across different battery sizes will change, with reduced support applying to additional capacity above certain thresholds.
How the STC factor changes after May 2026
The value of the federal battery rebate is influenced by a setting known as the STC factor. This factor determines how many certificates a battery system can create for each kilowatt hour of usable capacity.
Before May 2026, the STC factor was scheduled to decline gradually over longer intervals. From May 2026, the factor is expected to reduce more frequently, with adjustments occurring every six months rather than annually.
This means the timing of an installation becomes more important. A battery installed earlier may generate more certificates than the same battery installed later, even if the system itself does not change.
For a full breakdown of how the STC factor is expected to change through to 2030, refer to the national battery rebates guide.
STC factor timeline summary
- Until April 2026, the STC factor follows the existing annual step-down schedule.
- From May 2026, the STC factor reduces more frequently, with adjustments expected every six months.
- Each reduction lowers the number of certificates a battery can generate for the same usable capacity.
- Over time, this leads to smaller federal discounts for identical systems installed later.
For the full STC factor schedule through to 2030, see the national battery rebates guide.
How battery size affects rebate support from May 2026
From 1 May 2026, the federal battery rebate is expected to apply differently depending on battery size. Rather than applying the same level of support across the entire system, the rebate will taper as usable capacity increases.
Under the proposed structure, the highest level of support applies to the first portion of battery capacity. Additional capacity above that level receives progressively lower support.
In practical terms, this means larger batteries can still be installed and remain eligible, but the extra capacity above key thresholds contributes less to the rebate calculation. Correct sizing becomes more important, particularly for households considering larger systems.
Why the government is changing the battery rebate
The changes to the federal battery rebate are designed to keep the program sustainable over the long term. Battery costs have been falling as technology improves and uptake increases, and rebate settings are being adjusted to reflect this trend.
The program also plays a role in broader energy objectives, including increasing the amount of rooftop solar that is stored and used on site, reducing peak electricity demand, and supporting grid stability as more renewable energy comes online.
By gradually reducing support and encouraging appropriate system sizing, the program aims to continue supporting battery adoption through to 2030 without over-subsidising systems as prices decline.
Is the federal battery rebate ending in 2026?
No. The federal battery rebate is not ending in 2026. The program is expected to continue, but the value of the rebate can change depending on when the system is installed and how large the battery system is.
Households and businesses will still be able to access federal support after May 2026, provided their system meets eligibility requirements.
Why timing and planning matter
Because the rebate is influenced by both the installation date and the battery size, planning ahead is increasingly important. Two identical battery systems can receive different levels of support depending on when they are installed.
This is particularly relevant in areas with strong battery demand, where installer availability and product lead times can affect when a system is commissioned. In regions such as Sydney, Newcastle, the Central Coast, and large regional centres, installation schedules can fill quickly during periods of high demand.
What this means for NSW homeowners
For households in New South Wales, the federal changes influence how much support is available when combining the federal battery rebate with NSW-specific incentives. Many NSW households consider federal certificates alongside programs such as the Peak Demand Reduction Scheme, as well as optional Virtual Power Plant participation where available.
A detailed explanation of how federal and NSW incentives can be combined is covered in the NSW battery rebates guide.
Key points to remember
- The federal battery rebate continues after 2026, but the rules that determine its value change.
- The STC factor is expected to decline more frequently from May 2026.
- Battery size matters more, with reduced support applying to additional capacity above key thresholds.
- Installing earlier and choosing the right system size can affect the level of support received.
- Federal incentives can often be combined with state-based programs, depending on eligibility.
Next steps before installing a battery
- Understand how the installation date affects the federal rebate.
- Choose a battery size based on actual energy use rather than rebate maximisation alone.
- Review state and territory incentives that may be available in addition to federal support.
- If you are in NSW, check how federal certificates interact with NSW battery programs.
For a complete overview of the federal rebate structure and timelines, read the national battery rebates guide. For NSW-specific eligibility and savings pathways, refer to the NSW battery rebates guide.
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