Can You Combine the Federal and WA Battery Rebates?

Perth and WA homeowners adding a battery in 2026 can get help from two programs: the federal Cheaper Home Batteries Program and the WA Residential Battery Scheme. The question we hear most is whether you can have both. Yes, you can: the WA Government says the two can be combined, and both come off the price on your quote.

This article is part of our guide to Solar Battery Rebates in WA: Federal and State Schemes Explained.

This article explains what each one pays, how they stack, and what to check.

Understanding the Federal "Cheaper Home Batteries" Program (as of October 2026)

The Australian Government's Cheaper Home Batteries Program, which commenced on 1 July 2025, aims to reduce the upfront cost of installing eligible small-scale battery systems. The Government's aim is a discount of about 30% of the cost of a battery. The program is delivered through Small-scale Technology Certificates (STCs), a mechanism familiar to those who have installed solar panels. Installers claim these STCs on your behalf, passing the value directly through as an upfront discount on the battery's purchase price.

Key aspects of the Federal program in October 2026 include:

• Upfront Discount: The rebate is provided as an upfront reduction in cost, rather than a reimbursement you apply for directly.
• STC Mechanism: Eligible batteries generate STCs, which have a monetary value that is applied as a discount.
• Rebate Value: for batteries installed between 1 May and 31 December 2026 the factor is 6.8 STCs per kWh of usable capacity. The first 14 kWh earns the full factor, 14 to 28 kWh earns 60%, 28 to 50 kWh earns 15%, and nothing is paid above 50 kWh. Rebates step down on 1 January 2027, when the factor falls to 5.7, then to 5.2 from 1 July 2027, and keep falling every six months. Each STC is worth roughly $36 to $40 in 2026, depending on the market.
• Eligibility: the battery must be new, between 5 kWh and 100 kWh of usable capacity, on the approved product list, and installed by an accredited installer. The program is not means-tested.

Exploring the WA Residential Battery Scheme (as of October 2026)

Complementing the federal support, the Western Australian Government introduced the WA Residential Battery Scheme on 1 July 2025. It offers a rebate and, for eligible households, a no-interest loan.

Key details for the WA scheme in October 2026:

• Rebate Amounts: Eligible Synergy customers in the Perth area can receive up to $1,300, while Horizon Power customers in regional WA can receive up to $3,800. These rebates are capped at a usable battery capacity of 10 kWh, meaning larger batteries will still receive the maximum rebate amount for their respective customer type.
• No-interest loans: households with combined income under $210,000 can get a no-interest loan of up to $10,000, repaid over up to 10 years. Plenti, the scheme's administrator, manages the loans.
• Virtual Power Plant (VPP) Participation: you must sign up to a VPP product from your retailer (Synergy or Horizon Power) to get the rebate or the loan. In a VPP your retailer can use some of your battery's stored energy at times of high demand, under the product's terms.
• Eligibility Criteria: you must be a residential Synergy or Horizon Power customer, the battery must be new, VPP-capable and on your retailer's supported list, and the installer must be accredited and on the Plenti Vendor Directory. The full household and property criteria are on wa.gov.au. The scheme is paid until its 100,000 planned rebates are used, which the WA Government expects to last into 2027.

The Key Question: Can You Combine Battery Rebates in WA?

Yes. The WA Government says the WA scheme is in addition to the federal Cheaper Home Batteries Program. This means Perth and WA homeowners can stack both incentives to achieve substantial upfront savings on their solar battery installations.

How they interact:

• Federal as Upfront Discount: The federal rebate, through STCs, is typically applied as an upfront discount by your installer at the point of sale.
• WA rebate and loan: the WA rebate (up to $1,300 for Synergy customers) is also paid to the accredited vendor and taken off your price; the optional loan, arranged through Plenti, can cover some or all of the rest.

For a 10 kWh battery installed before 31 December 2026, the two together come to roughly $3,700 to $4,000 for a Synergy customer and roughly $6,200 to $6,500 for a Horizon Power customer, depending on the STC price. From 1 January 2027 the federal part for the same battery falls by about 16%.

Illustrative Example for a Perth Homeowner (October 2026)

Let's consider a hypothetical Perth homeowner, Sarah, who is a Synergy customer and wants to install a new 10 kWh solar battery system in October 2026.

• Federal Rebate: 10 kWh × 6.8 = 68 STCs. At roughly $36 to $40 each, that is about $2,450 to $2,720 off.
• WA Residential Battery Scheme Rebate: As a Synergy customer, Sarah would be eligible for a WA state rebate of $1,300 for her 10 kWh battery, the maximum, which is based on 10 kWh of usable capacity.
• Combined Rebate: about $3,750 to $4,020 off the price, depending on the STC price on the day. If Sarah installed the same battery after 1 January 2027, the federal part would be 57 STCs instead of 68.

Furthermore, if Sarah's household income is below $210,000, she could also apply for an interest-free loan of up to $10,000 to cover the remaining costs, making the upfront investment even more manageable.

Please note: These figures are illustrative and based on available data as of October 2026. Actual rebate amounts may vary depending on the exact STC price at the time of installation, battery capacity, and any future adjustments to the schemes. Always confirm the latest figures with an accredited installer or official government sources.

Navigating the Landscape: What Else to Consider?

Beyond the direct rebates, several other factors influence the overall financial viability and benefits of a solar battery system in Perth and regional WA:

• Distributed Energy Buyback Scheme (DEBS): For Synergy customers, DEBS pays for excess solar energy exported to the grid. DEBS pays 10 cents per kWh for energy exported between 3pm and 9pm and 2 cents at all other times, on the first 50 kWh a day (rates effective 1 July 2025). A battery system can significantly enhance savings by allowing you to store midday surplus (which would earn the lower off-peak rate if exported) and use it during peak evening hours, avoiding higher import charges, or exporting it for the higher DEBS peak rate. Horizon Power has its own buyback rates for regional customers, which vary by town.
• Western Power Grid Connection and Emergency Solar Management (ESM): Western Power manages the South West Interconnected System (SWIS), which covers Perth and much of populated WA. From 1 May 2026, every new or upgraded solar and battery system (up to 30 kVA on a standard connection) must either be able to be switched off and on remotely by your electricity retailer, used only as a last resort in a grid emergency, or be export-limited to 1.5 kW. Your home keeps its grid supply while this happens. Your installer sets this up at installation.
• Accreditation: your installer must be accredited, and for the WA rebate on the Plenti Vendor Directory; the battery and inverter must be on the approved product list. Sun Direct Power is an approved Plenti vendor.
• Battery System Sizing and Selection: Choosing the right battery capacity is crucial. While rebates provide incentives for specific sizes (e.g., the WA rebate caps at 10 kWh, and the federal rebate tapers after 14 kWh), the optimal size for your home should align with your actual evening energy consumption to maximise long-term savings. Always check the current datasheets for product facts like capacity, warranty, and cycle life.

Maximising Your Savings: Tips for WA Homeowners

1. Act Promptly: Rebates step down on 1 January 2027 (federal battery factor 6.8 → 5.7) and the WA rebate is paid only until its 100,000 rebates are used, so installing before 31 December 2026 locks in this year's rates.
2. Understand VPPs: read the terms of your retailer's VPP product before you sign: how much of the battery it can use, when, and what you are paid.
3. Check Eligibility Carefully: Review the specific eligibility criteria for both federal and state schemes, including property type, electricity retailer, and approved equipment. Your accredited installer can help verify your eligibility.
4. Get Expert Advice: Work with a reputable, accredited solar and battery installer in Perth. They can provide accurate quotes that incorporate all applicable rebates, handle the application paperwork, and design a system best suited for your household's needs and energy consumption patterns.

Frequently Asked Questions

Q: Do the rebates cover the full cost of a battery? A: No, the rebates significantly reduce the upfront cost of a battery system, but they typically do not cover the entire cost. The federal discount aims for about 30% off, and the WA rebate adds up to $1,300 (Synergy) or $3,800 (Horizon Power). However, with the optional interest-free loan in WA, eligible households could potentially cover the remaining balance without a large lump-sum payment.

Q: How do I apply for these rebates? A: You generally do not apply directly to the government for these rebates. Your approved, accredited solar and battery installer will apply for the rebates on your behalf and pass the savings through as an upfront discount on your quote.

Q: What is a Virtual Power Plant (VPP)? A: A Virtual Power Plant (VPP) is a network that links thousands of household batteries, coordinating them to act as one large, flexible power source. By joining a VPP, your battery can help stabilise the WA electricity grid, particularly during high demand, and depending on the product you may be paid for taking part.

Conclusion

You can combine the federal Cheaper Home Batteries discount with the WA Residential Battery Scheme rebate, and eligible households can add the no-interest loan. Both rebates are taken off your quote by the installer. The federal part steps down on 1 January 2027, so the timing of your installation matters.

By carefully considering eligibility, understanding the benefits of VPP participation, and using an accredited installer on the Plenti Vendor Directory, you get both rebates off the price.

---

Disclaimer: The information provided in this article is for general guidance only and is based on publicly available data as of October 2026. Rebate amounts, eligibility criteria, and scheme terms can change. It is essential to consult with a Clean Energy Council accredited installer and refer to official government websites (e.g., DCCEEW, Clean Energy Regulator, Energy Policy WA, Synergy, Horizon Power) for the most accurate and up-to-date information specific to your circumstances. This article does not constitute financial advice.

Related Guides

Start with the full overview: Solar Battery Rebates in WA (2026): Federal and State Schemes Explained.

• Virtual Power Plants (VPPs) in WA: What Joining Means for Your Battery
• WA Interest-Free Battery Loans: Who Qualifies and How They Work