Western Australia's Residential Battery Scheme, launched in 2024, remains the most active state battery rebate in 2026 alongside NSW's PDRS. The amounts and eligibility are very specific to which network you're on.
Synergy customers (South West Interconnected System)
$130 per usable kWh of battery capacity, capped at $1,300 (10 kWh maximum). Battery must be between 5 and 10 kWh usable. VPP enrolment with a participating retailer is mandatory.
Horizon Power customers (regional + remote)
$380 per usable kWh of battery capacity, capped at $3,800 (10 kWh maximum). The higher rate reflects Horizon's higher local energy infrastructure costs. VPP enrolment is also required.
Combined federal + state stack
For a Synergy customer installing a 10 kWh battery in 2026:
- Federal Cheaper Home Batteries: 68 STCs ≈ $2,713
- WA Residential Battery (Synergy): $1,300
- Combined: ~$4,013 off a $9,000–$11,000 battery install
For a Horizon customer, the stack is larger: ~$2,713 federal + $3,800 state = ~$6,513.
WA's regulated DEBS feed-in tariff (2.0 c/kWh off-peak, 10 c/kWh peak 3–9pm) makes batteries especially valuable: charge midday at low export prices, discharge during the peak window for the full 10 c/kWh.