Western Australia is at the forefront of the solar battery revolution, with homeowners across the state increasingly looking to harness the sun's energy for greater independence and lower electricity bills. As of October 2026, both federal and state government initiatives are in place to support the adoption of battery storage. However, for residents in Perth and the broader Western Australian region, understanding how these solar battery rebates differ between Synergy and Horizon Power customers is crucial.
The unique energy landscapes served by these two major retailers mean that while the overarching goal of supporting solar battery uptake is shared, the specific programs, incentives, and pathways to savings can vary significantly. This article explains these differences to help Western Australian homeowners make the most of the battery rebates available to them.
This article is part of our guide to Solar Battery Rebates in WA: Federal and State Schemes Explained.
Install before 31 December 2026 to lock in this year's rebates.
From 1 January 2027 the federal battery rebate drops by about 16% (STC factor 6.8 → 5.7) and the solar panel rebate by about 20% (deeming period 5 → 4 years). It falls again in July 2027. The WA $1,300 rebate is limited to 100,000 households and is paid until the allocation runs out. Installation slots before Christmas fill fast, so lock in a date now.
Before exploring the specifics of battery rebates, it's essential to grasp the distinct roles of Synergy and Horizon Power in Western Australia's electricity supply.
Synergy Synergy is the largest energy retailer in Western Australia, primarily serving over one million residential and business customers in the South West Interconnected System (SWIS). This network covers Perth and the major population centres of the South West. If you reside in areas like Perth, Mandurah, Bunbury, or Geraldton, you are most likely a Synergy customer. The SWIS is a large, integrated grid where electricity generation and demand are managed centrally.
Horizon Power In contrast, Horizon Power is the state government-owned utility responsible for generating, procuring, distributing, and retailing electricity to some of the most remote and regional parts of Western Australia. From the Kimberley and Pilbara in the north to parts of the Goldfields and the south coast, Horizon Power runs the North West Interconnected System in the Pilbara and dozens of smaller, isolated systems in towns such as Broome, Carnarvon and Esperance, none of which are connected to the SWIS. This geographical and operational distinction directly impacts how solar battery incentives are structured and delivered to their customers.
Regardless of whether you are a Synergy or Horizon Power customer, the Federal Government's Cheaper Home Batteries Program applies across Australia, including Western Australia. This initiative officially commenced on 1 July 2025 and is designed to make battery storage more accessible by providing an upfront discount. The program operates through the established Small-scale Renewable Energy Scheme (SRES), where eligible solar battery installations generate Small-scale Technology Certificates (STCs). These STCs are then claimed by your installer, who passes the value on to you as a direct discount on the purchase and installation cost of your battery system.
It's important to note that the level of support provided by these STCs is designed to step down over time. This structure encourages early adoption and ensures the program's long-term sustainability. For batteries installed from 1 May to 31 December 2026, each kWh of usable capacity earns 6.8 STCs up to 14 kWh, 60% of that from 14 to 28 kWh, and 15% from 28 to 50 kWh. Rebates step down on 1 January 2027, when the factor falls to 5.7 (about 16% less), and keep falling every six months. The dollar value of each STC moves with the market, so your quote shows the exact discount.
The Western Australian State Government has introduced its own Residential Battery Scheme to further encourage battery storage adoption. The rebate amount depends on your retailer, while the other rules are the same for both. For both Synergy and Horizon Power customers, you must join a Virtual Power Plant (VPP) product with your retailer, the battery must be on the retailer's supported list, and the installer must be an approved vendor on the Plenti Vendor Directory. The scheme is limited to 100,000 rebates and runs until they are used, which the WA Government expects to last into 2027.
For homeowners connected to the SWIS and serviced by Synergy, the WA Residential Battery Scheme provides a rebate of up to $1,300, with the maximum reached at 10 kWh of usable capacity. Households with a combined income under $210,000 can also apply for a no-interest loan of up to $10,000 over up to 10 years, administered by Plenti.
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Get Started Now →Virtual Power Plant (VPP) Integration: A major component of the state scheme for Synergy customers is the integration with Virtual Power Plants (VPPs). By allowing your battery to be part of a VPP, you contribute to a network of interconnected home batteries that can be centrally managed to support the grid during peak demand or supply shortages. In return for participating, households may receive various benefits, which can enhance the financial return of their battery investment.
Distributed Energy Buyback Scheme (DEBS): Beyond upfront rebates, Synergy customers with solar PV systems, including those with batteries, participate in the Distributed Energy Buyback Scheme (DEBS). This scheme provides credits on your electricity bill for any excess solar power you export back to the grid. Synergy's DEBS pays 10 cents per kWh for electricity exported between 3pm and 9pm and 2 cents per kWh at all other times. This means a battery that stores midday solar for evening use usually earns far more than exporting it.
Emergency Solar Management (ESM) and remote management: New and upgraded systems in the SWIS must support Emergency Solar Management, which lets Synergy switch rooftop solar off as a last resort when there is too much solar on the grid and demand is very low. Since 1 May 2026, new or upgraded solar and battery systems up to 30 kVA must also be set up for remote management by the retailer, or be fixed to a 1.5 kW export limit.
For customers in regional and remote Western Australia served by Horizon Power, the WA Residential Battery Scheme offers a rebate of up to $3,800 (again, the maximum is reached at 10 kWh of usable capacity), and the same no-interest loan of up to $10,000 for households with a combined income under $210,000. The higher rebate reflects the cost and challenges of supplying electricity in smaller, isolated networks.
Tailored Support for Regional Grids: Horizon Power's operational context, with its numerous microgrids, necessitates a different approach to battery integration. The state scheme acknowledges these variations, aiming to provide relevant support that helps stabilise local grids and increase energy independence in regional communities.
Horizon Power's Buyback Scheme: Similar to Synergy, Horizon Power customers can also benefit from a buyback scheme for excess solar energy exported to the grid. The principle is the same as DEBS, but Horizon Power's buyback rates and system size rules vary by town, so check them with Horizon Power for your location.
The most significant distinction for homeowners considering solar battery rebates lies in the specifics of the WA Residential Battery Scheme.
To illustrate how these differences play out, let's consider two hypothetical scenarios (these examples use round, clearly hypothetical numbers for illustrative purposes only and do not represent actual costs or savings):
Illustrative Example 1: Perth Homeowner (Synergy Customer)
Imagine a homeowner in Perth with a 6.6 kW solar panel system already installed, now looking to add a 10 kWh battery.
The combination of federal STC discounts, state scheme support, and strategic energy management via DEBS and VPP participation significantly enhances the financial viability of their battery investment.
Illustrative Example 2: Regional WA Homeowner (Horizon Power Customer)
Consider a homeowner in a regional town like Broome, serviced by Horizon Power, also looking to add a 10 kWh battery to their existing solar system.
For this regional homeowner, the federal and state incentives, combined with their local retailer's buyback scheme, provide a strong case for investing in battery storage, enhancing their energy resilience and reducing costs in a potentially more isolated grid environment.
Applying for solar battery rebates in Western Australia involves a few key steps:
Virtual Power Plants (VPPs) are becoming an increasingly central feature of Western Australia's energy future, particularly in relation to the state battery scheme. A VPP aggregates numerous small-scale energy resources, such as residential solar batteries, into a single, controllable network. This allows them to act collectively like a larger power plant.
For homeowners, joining a VPP often provides additional financial benefits, such as payments or credits for making your battery available to the network. The VPP operator can draw energy from your battery during periods of high demand on the grid, or charge it during times of excess supply, helping to stabilise the energy network. This collaborative approach helps integrate more renewable energy efficiently and reliably. The WA Residential Battery Scheme requires VPP participation, highlighting its importance for future grid management.
When selecting a battery system, several factors warrant consideration:
Q: Can I combine the Federal Cheaper Home Batteries Program with the WA Residential Battery Scheme? A: Yes. The federal program gives an upfront discount via STCs, and the WA scheme adds its rebate (and the optional no-interest loan). Both can be applied to the same battery.
Uncover your eligibility and potential savings from Perth's battery rebates.
Get My Free Quote →Q: Do I have to join a Virtual Power Plant (VPP) to get the WA Residential Battery Scheme rebate? A: Yes. For both Synergy and Horizon Power customers, joining your retailer's VPP product is a condition of the WA rebate.
Q: How does the Emergency Solar Management (ESM) affect my battery system if I'm a Synergy customer? A: ESM applies to new and upgraded solar systems in the SWIS (Synergy's service area). It lets Synergy switch rooftop solar off as a last resort when grid demand is very low. It is rarely used; while it is active your solar may stop generating, and your battery can keep supplying your home.
Q: Is there extra help with the upfront cost? A: Yes. Households with a combined income under $210,000 can apply for a no-interest loan of up to $10,000 over up to 10 years under the WA Residential Battery Scheme, administered by Plenti.
Investing in a solar battery system in Western Australia in October 2026 presents a compelling opportunity for homeowners to enhance their energy independence, reduce electricity bills, and contribute to a greener energy future. While the Federal Cheaper Home Batteries Program offers a consistent upfront discount across the state, the WA Residential Battery Scheme introduces crucial differences for Synergy and Horizon Power customers. The main differences are the rebate amount ($1,300 vs $3,800) and the buyback rates; the VPP requirement and the loan are the same. Rebates step down on 1 January 2027, when the federal discount falls by about 16%.
For Perth and SWIS residents, Synergy's DEBS and the integration with a VPP under the state scheme offer distinct pathways to maximise savings. For regional WA homeowners, Horizon Power's specific support levels and local buyback schemes are designed to address the unique energy needs of their microgrids.
An approved installer can confirm which rebate applies to you and apply it, with the federal discount, on your quote.
Please note that all information regarding rebates, schemes, and tariffs is subject to change by the respective government bodies and energy retailers. This article provides general guidance as of October 2026. Rebate figures were checked against wa.gov.au and the federal program rules on 27 October 2026.
Homeowners should always verify current eligibility criteria, terms, and values with official sources such as energy.gov.au, cleanenergyregulator.gov.au, wa.gov.au, synergy.net.au, horizonpower.com.au, or their chosen installer before making any investment decisions. The illustrative examples provided are hypothetical and do not guarantee actual savings or outcomes.
Ready to explore your solar battery options and understand the specific rebates available to your Perth or regional WA home? Contact Sun Direct Power for a personalised consultation. We can help you design a system and navigate the federal and state rebate schemes to maximise your savings.
Sun Direct Power installs solar and batteries across Perth and WA and is an approved vendor for the WA Residential Battery Scheme. Our packages pair solar with a large battery and take the federal and WA rebates off the price up front. Systems start from $7,114 after rebates.
Rebate and scheme figures checked against official sources on 27 October 2026.
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