WA STC Rebate Calculator: Solar & Battery Incentives

How STCs Work in Western Australia

Perth and southern WA are primarily Zone 3 (factor 1.382), with northern regions in Zone 2 and Zone 1. The number of STCs you receive depends on your specific postcode's zone factor, your system size, and the installation year. STCs are claimed by your installer and the rebate is deducted directly from your system price upfront.

WA STC Zone Factors

Perth and southern WA are primarily Zone 3 (factor 1.382), with northern regions in Zone 2 and Zone 1

Feed-in Tariffs in Western Australia

Western Australia uses the Distributed Energy Buyback Scheme (DEBS) with time-varying rates. Feed-in tariffs range from 2.0 c/kWh during off-peak times to 10.0 c/kWh during peak periods, encouraging solar export during high-demand times.

Time-of-use rates reward solar export during peak demand periods in the afternoon. Compare rates at EnergyMadeEasy.gov.au.

STC Rebates in Perth

A 10.0 kW solar system installed in Perth (postcode 6000) in 2025 will generate 82 STCs, worth approximately $3,116. This rebate is deducted directly from your installation cost upfront.

Perth's STC Zone Factor

Perth is located in Zone 3 with a rating factor of 1.382. This provides strong STC rebate values for solar installations.

Why Solar Works Well in Perth

Perth receives an average of 8.0 hours of sunshine per day, providing excellent conditions for solar energy generation. A 10.0 kW system typically generates 28-32 kWh per day in Perth, which covers most household electricity needs.

With the STC rebate reducing upfront costs, Perth households typically see payback periods of 4-5 years for solar systems.

STC Rebates in Bunbury

A 6.6 kW solar system installed in Bunbury (postcode 6230) in 2025 will generate 54 STCs, worth approximately $2,052. This rebate is deducted directly from your installation cost upfront.

Bunbury's STC Zone Factor

Bunbury is located in Zone 3 with a rating factor of 1.382. This provides strong STC rebate values for solar installations.

Why Solar Works Well in Bunbury

Bunbury receives an average of 7.8 hours of sunshine per day, providing excellent conditions for solar energy generation. A 6.6 kW system typically generates 26-30 kWh per day in Bunbury, which covers most household electricity needs.

With the STC rebate reducing upfront costs, Bunbury households typically see payback periods of 4-5 years for solar systems.