WA is the best state in the country to install a home battery right now. You get the federal Cheaper Home Batteries discount like everyone else, and Western Australia is one of only two states adding a meaningful top-up on to it. Here is what stacks, and what it is worth on your invoice.
Scheme factors last reviewed
Most popular home batteries are 10 to 15 kWh usable. Check your battery's datasheet for the usable (not nominal) capacity.
Select your state above to see your estimate.
We will send your personalised estimate summary plus a plain-English checklist of what you need to be eligible for the CHBP in 2026.
Since 1 March 2026 the Clean Energy Regulator requires geotagged, timestamped photos of battery labelling and serial numbers on every STC claim, and uses automated checks to reject the ones that fall short. NSW installs move to the mandatory CER (Consumer Energy Resources) Installer Portal from mid-2026 with CSIP-AUS backstop-enabled inverters, and solar panels not certified to IEC 61730:2023 came off the approved list on 1 May. Get the free one-page checklist covering all three, plus CEC approved-product, SAA accreditation, STC assignment and DNSP notification.
Two rebates apply in WA and they stack:
| Federal CHBP discount | 6.8 STCs per usable kWh for the first 14 kWh, applied by your installer as a point-of-sale discount. Roughly $250 per usable kWh at current certificate prices. |
| WA Residential Battery Scheme | Up to $1,300 if you are a Synergy customer (most of the South West Interconnected System, including Perth). Up to $3,800 if you are a Horizon Power customer in regional WA. VPP enrolment is required to claim it. |
The WA scheme is administered by the state and paid through your retailer, not the Clean Energy Regulator. The amount depends on which network you are on. Synergy customers, which is most of Perth and the South West, are capped at $1,300. Horizon Power customers in regional WA are capped at $3,800, reflecting the higher cost of running regional networks.
The condition that catches people out is Virtual Power Plant enrolment. The WA top-up requires you to join a VPP, meaning your battery can be called on to support the grid at peak times. That is different to the federal rebate, where your battery only has to be VPP-capable and you are not obliged to join anything. If you are not willing to enrol, you still get the federal discount but not the WA amount.
Your network operator is Western Power in the South West and Horizon Power in regional areas. Either way your installer handles the grid connection notification, so there is no separate form for you.
Perth sits in STC zone 3 (rating 1.382). Inland and northern WA fall into zones 1 and 2, which earn more certificates on the solar side, so a postcode sharpens the estimate if you are outside the metro area.
See every factor behind these numbers, including the certificate price we assume and what we deliberately do not model.