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: 10 × $258 = $2,580
- WA Residential Battery (Synergy): $1,300
- Combined: ~$3,880 off a $9,000–$11,000 battery install
For a Horizon customer, the stack is larger: ~$2,580 federal + $3,800 state = $6,380.
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.