WA Solar Battery Rebates

Last updated October 2026

The WA Government’s Residential Battery Scheme launched on 1 July 2025 offers rebates and no-interest loans to Western Australian households.

The scheme is one of the most generous battery incentives in Australia and is driving huge demand for batteries in WA.

Launch: 1 July 2025.
Rebate: up to $1,300 for Synergy customers, and up to $3,800 for Horizon Power customers. The actual rebate will be determined by the size of the battery.
Interest-free Loans: for the remaining cost, zero interest loans up to $10,000. Means-tested for low and medium-income households.
Caps: 100,000 battery rebates in total.
Budget: $337 million, plus a separate $50M investment in WA-based battery manufacturing.
Closing Date: the scheme is currently expected to run until 2027, pending distribution of all planned rebates.

With only 100,000 rebates available, demand is high.

Who is eligible for the WA Solar Battery Rebate?

To be eligible for the WA battery rebate, you must:

Be a Synergy or Horizon Power customer.
Install a new or replacement battery system on or after 1 July 2025 (systems installed before this date are ineligible).
Install a battery with minimum 5 kWh usable capacity (rebate up to 10 kWh). You can install a solar system and battery together (a “bundle”) or just the battery (e.g. as an add-on to an existing solar system).
Ensure battery & inverter are on Synergy/Horizon Power approved lists and meet technical standards.
Use an installer on Plenti’s approved vendor directory (and SAA-accredited for the federal rebate).
Connect the battery to a Virtual Power Plant (VPP) with internet access.
Own or rent (with permission) a residential property in WA; landlords must approve.
Meet additional criteria set by the WA Government (sign-up below for alerts).

Rebates Available:

Electricity Retailer	Rebate Amount	Battery Size Cap
Synergy	$130 per kWh (max $1,300)	10 kWh max
Horizon Power	$380 per kWh (max $3,800)	10 kWh max

An interest-free loan of up to $10,000 will also be available to help with upfront costs, means-tested up to a maximum of $210,000 in household income.

Loans can be used for batteries and new or upgraded equipment such as inverters and solar panels, as long as they are installed with a battery.

The no-interest loan component of the WA Residential Battery Scheme will be managed by Plenti.

Homeowners can receive both the WA State Rebate and the new Federal Battery Rebate.

Combining the WA Home Battery Rebate, with the Federal Solar Battery Rebate and the Federal STC Solar incentive, makes a solar and battery system a no brainer for many West Australian homes.

The Federal Battery Rebate is worth roughly $250 to $260 per kWh for the first 14kWh (tapering to 60% of that rate for 14 to 28kWh and 15% for 28 to 50kWh, up to 50kWh usable). The rate steps down every six months, so get a current quote.
The WA State Rebate offers up to 10 kWh of subsidised capacity, depending on your electricity retailer.

How Affordable Does the Scheme Make Batteries for WA Homes?

Typical, batteries cost between $10,000 and $15,000. Therefore, the combination of the rebate and interest-free loan significantly lowers the financial barrier for homeowners.

Here are our estimates:

Upfront Cost: Assuming a $15,000 battery gets the combined Federal and WA State Rebate (Synergy) of roughly $3,900 for a 10kWh system, the out-of-pocket price would reduce to around $11,100.
Remaining Costs: eligible low and medium-income households can also get an interest-free loan of up to $10,000 to cover most of the remaining cost, bringing the upfront cost down to around $1,100.
Payback Period: the WA Government estimates households could save up to $1,500 per year by combining a battery with rooftop solar. Depending on your electricity usage patterns, that could mean a payback period of around 7 to 8 years on this example.
Cash Flow: Monthly loan repayments may be offset by electricity bill savings, improving affordability.

FAQs

Does the WA Battery Rebate allow for retrofitting batteries to existing solar systems?
Yes, the scheme does allow retrofitting, as long as you meet all the eligibility criteria. Register for updates below.

Can renters apply for the WA Residential Battery Rebate?
Long-term rental properties are eligible for the WA Scheme, subject to agreement by the landlord and tenant on the battery installation.

Next Steps

Get 3 quotes from approved WA installers.
Confirm battery system, inverter, and installer meet eligibility and VPP standards.
Schedule installation from 1 July 2025 onward.
Vendor submits application for both WA and Federal rebates & loan via Plenti.

We’ll continue to update this page and our blog as the WA Government releases more information about the WA Residential Battery Scheme.