WA rebate calculator 2026
A 6.6kW solar system in Perth attracts roughly $1,800 in federal STC rebate; a 13.5kWh battery adds about $4,455 federal battery discount. Eligible Synergy customers can also access WA interest-free battery loans. All PSW pricing already includes these incentives.
Common sizes: Powerwall 3 = 13.5 kWh · SigenStor module = 8 kWh
$1,778
Solar rebate (STCs)
$0
Battery discount
$1,778
Total incentives
Federal STC rebate (Perth Zone 3, 2026 deeming) + federal Cheaper Home Batteries discount ($330/usable kWh, 5–50 kWh band). Eligible Synergy customers may also access WA interest-free battery loans on top. All PSW pricing already includes these incentives.
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