Western Australia
WA battery rebate: the state's share and the federal share
Updated
Western Australia is the one state that still pays a cash rebate on a home battery. On top of the federal discount, Synergy customers can get up to $1,300 and Horizon Power customers up to $3,800, as long as they join their retailer’s virtual power plant.
Up to $1,300 for Synergy customers or $3,800 for Horizon Power customers, applied as an upfront discount. The maximum is set at 10 kWh usable; larger batteries get the same maximum. You must sign up to the retailer's VPP for two years. (WA Government, checked )
Federal plus WA rebate by battery size (Synergy customers)
| Usable kWh | Federal, May–Dec 2026 | With WA, now | Federal, Jan–Jun 2027 | With WA, from 1 Jan | Horizon Power, now |
|---|---|---|---|---|---|
| 10 kWh | $2,720 | $4,020 | $2,280 | $3,580 | $6,520 |
| 13.5 kWh | $3,640 | $4,940 | $3,040 | $4,340 | $7,440 |
| 16 kWh | $4,120 | $5,420 | $3,440 | $4,740 | $7,920 |
| 20 kWh | $4,760 | $6,060 | $4,000 | $5,300 | $8,560 |
| 25 kWh | $5,600 | $6,900 | $4,680 | $5,980 | $9,400 |
| 30 kWh | $6,160 | $7,460 | $5,160 | $6,460 | $9,960 |
| 40 kWh | $6,560 | $7,860 | $5,480 | $6,780 | $10,360 |
WA’s own example is out of date
The state’s applicant page says a 10 kWh battery gets the $1,300 maximum and that the rebate “would increase to $5,000 when combined with the federal rebate”. That figure predates the federal changes of 1 May 2026. At today’s factor of 6.8, 10 kWh earns $2,720 federally, so the combined figure is $4,020, and from 1 January 2027 it falls to $3,580.
“A 10kWh battery would be eligible for the maximum $1,300 rebate from the WA Battery Scheme. The rebate would increase to $5,000 when combined with the federal rebate.” (Page last updated 29 June 2026.) (WA Government, checked )
Because the WA amount is flat above 10 kWh, it matters most on small batteries. On a 10 kWh battery it is 32% of the combined discount today; on a 30 kWh battery it is 17%.
The conditions
- You must be a Synergy or Horizon Power customer and join a virtual power plant. The VPP agreement runs for two years.
- The inverter must be on your network’s Supported Solutions List; the battery must also meet the federal approved-list rule.
- You buy through an approved vendor, who applies for the rebate on your behalf. You don’t apply to the government.
- Batteries installed before 1 July 2025 are not eligible for the rebate or the loan.
“Households will be required to participate in a Virtual Power Plant (VPP) to be eligible for the scheme.” “The VPP agreement is only two years, after which you can opt out at any time.” (WA Government, checked )
The scheme runs until all 100,000 planned rebates are given out; the number was raised from 20,000 when the federal program began. (WA Government, checked )
Zero-interest loan
$2,001 to $10,000 at zero interest over 3 to 10 years, for households with gross income under $210,000. (WA Government, checked )
Readers in WA: we don’t currently link to an installer that confirms it serves Western Australia. Ask installers on the scheme’s vendor directory for quotes.
Questions
Can I get the WA rebate and the federal discount together?
Yes. The WA Government says its scheme is in addition to the federal Cheaper Home Batteries Program, so an eligible battery gets both, each applied as an upfront discount by the installer.
Does a bigger battery get a bigger WA rebate?
No. The WA maximums are set at 10 kWh of usable capacity, and larger batteries get the same maximum. Above 10 kWh, only the federal discount grows with size, and it grows more slowly past 14 kWh because of the federal taper.
How long will the WA rebate last?
Until the 100,000 planned rebates are used. In December 2025 the government expected that to be some time in 2027. No live count of remaining rebates is published.
Work out the federal part for your own battery and date with the rebate calculator, or see every step-down date.