Solar and battery rebates in Western Australia
Perth and the south-west are STC zone 3. The Pilbara and Kimberley are zone 1.
Federal rebates on common systems
| System | Certificates | Rebate if installed in 2026 | Battery, Jan to Jun 2027 |
|---|---|---|---|
| 6.6 kW solar | 45 | $1,665 | steps down 1 Jan |
| 10 kW solar | 69 | $2,553 | steps down 1 Jan |
| 13.3 kW solar | 91 | $3,367 | steps down 1 Jan |
| 10 kWh battery | 68 | $2,516 | $2,109 |
| 13.5 kWh battery | 91 | $3,367 | $2,812 |
| 20 kWh battery | 119 | $4,403 | $3,700 |
STC zone 3, $37 per certificate. Solar uses a 5-year deeming period for 2026 installs (4 years in 2027).
WA Residential Battery Scheme
Synergy customers get $130 per kWh up to $1,300. Horizon Power customers in regional WA get $380 per kWh up to $3,800. The battery must be 5 kWh or more and join a virtual power plant. No-interest loans are also available, subject to a credit check.
How the battery rebate is tiered
Since 1 May 2026 the first 14 kWh of usable capacity gets the full rate, each kWh from 14 to 28 gets 60%, and each kWh from 28 to 50 gets 15%. Batteries under 5 kWh aren't eligible. A battery sized to your evening use usually gets the best rebate per dollar.
Common questions
What rebates can I get in Western Australia?
The federal solar rebate (STCs) and the federal Cheaper Home Batteries rebate apply everywhere. WA Residential Battery Scheme: Synergy customers get $130 per kWh up to $1,300. Horizon Power customers in regional WA get $380 per kWh up to $3,800. The battery must be 5 kWh or more and join a virtual power plant. No-interest loans are also available, subject to a credit check.
When does the battery rebate drop?
The battery rebate steps down on 1 January 2027, from 6.8 to 5.7 certificates per kWh, and keeps stepping down every six months until the end of 2030.
Who claims the rebate?
Your installer. You assign the certificates to them and they take the value off your price. State rebates have their own application, which the installer guides you through.
Figures as at 29 October 2026. Certificate values move with the market. Check current program rules before you sign.