How much is the WA battery rebate?

Synergy customers get $130 per kWh, up to $1,300. Horizon Power customers get $380 per kWh, up to $3,800. The battery must join a VPP, and the WA rebate stacks with the federal discount.

Can I get an interest-free loan for a battery in WA?

Yes. Households with a combined income under $210,000 can get an interest-free loan of up to $10,000 under the scheme.

How is the federal battery rebate worked out?

Usable capacity earns certificates (STCs): the first 14 kWh at the full factor, 14 to 28 kWh at 60%, and 28 to 50 kWh at 15%. For batteries installed 1 May to 31 Dec 2026 the factor is 6.8. A 13.5 kWh battery earns 91 certificates, worth about $3,367 at $37 each. The installer applies it as a discount on the price.

Is the battery rebate going down?

Yes. The factor drops every six months. From 1 Jan to 30 Jun 2027 it is 5.7, down from 6.8. Battery prices are also falling, so a lower rebate does not always mean a dearer battery, but the discount itself gets smaller.

Solar battery rebate in Western Australia

For a battery installed 1 May to 31 Dec 2026, the federal discount is about $2,516 on a 10 kWh battery and $3,367 on a 13.5 kWh battery, at $37 a certificate. WA Residential Battery Scheme: Synergy up to $1,300, Horizon Power up to $3,800.

Western Australia is the most generous state for batteries: the WA Residential Battery Scheme pays a rebate on top of the federal discount, as long as the battery joins a VPP.

Work out your battery rebate

Usable battery capacity (kWh)

State or territory

Installation date

Certificate (STC) price passed on ($)

Set by the installer after their costs. $37 is a typical figure; your quote shows the real one.

Estimated federal discount

$3,367

91 certificates: 13.5 eligible kWh x factor 6.8 (1 May to 31 Dec 2026).

Plus the WA rebate: $1,300, for a total of $4,667 (battery must join a VPP).

The same battery installed in the next period (1 Jan to 30 Jun 2027) would get about $2,812.

Formula from the Clean Energy Regulator: first 14 kWh at the full factor, 14 to 28 kWh at 60%, 28 to 50 kWh at 15%. It does not vary by postcode. Estimate only; the installer's quote is the real figure.

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Western Australia: WA Residential Battery Scheme

Open

Synergy up to $1,300, Horizon Power up to $3,800

Synergy customers: $130 per kWh, up to $1,300.
Horizon Power (regional) customers: $380 per kWh, up to $3,800.
The battery must join a virtual power plant.
Interest-free loans of up to $10,000 for households earning under $210,000.
Stacks with the federal discount. Installed by an NETCC Approved Seller with a WA address.

Source: SolarQuotes: battery rebates by state (WA), checked 2 July 2026. Also: WA Government: scheme eligibility requirements (2 July 2026).

The federal discount, in plain English

It comes off the installer's price. There is no form to fill in and no income test.
Batteries of 5 to 100 kWh qualify, but only the first 50 kWh of usable capacity earns certificates, and bigger batteries earn less per kWh.
The battery must be on the approved list, installed by an SAA-accredited installer, paired with solar, and able to join a virtual power plant. One per electricity meter.
It is the same in every state; it does not vary by postcode.
It steps down every six months. From 1 Jan to 30 Jun 2027 the factor drops to 5.7.

Source: Clean Energy Regulator: Cheaper Home Batteries, checked 11 November 2026.

Western Australia battery rebate questions

How much is the WA battery rebate?: Synergy customers get $130 per kWh, up to $1,300. Horizon Power customers get $380 per kWh, up to $3,800. The battery must join a VPP, and the WA rebate stacks with the federal discount.
Can I get an interest-free loan for a battery in WA?: Yes. Households with a combined income under $210,000 can get an interest-free loan of up to $10,000 under the scheme.
How is the federal battery rebate worked out?: Usable capacity earns certificates (STCs): the first 14 kWh at the full factor, 14 to 28 kWh at 60%, and 28 to 50 kWh at 15%. For batteries installed 1 May to 31 Dec 2026 the factor is 6.8. A 13.5 kWh battery earns 91 certificates, worth about $3,367 at $37 each. The installer applies it as a discount on the price.
Is the battery rebate going down?: Yes. The factor drops every six months. From 1 Jan to 30 Jun 2027 it is 5.7, down from 6.8. Battery prices are also falling, so a lower rebate does not always mean a dearer battery, but the discount itself gets smaller.

Other states

Will a battery pay for itself? · All battery rebates

Reviewed by James Baker, Founder, EnergyPlans.com.au. Data last verified 11 November 2026. Methodology.