SA STC Rebate Calculator: Solar & Battery Incentives

How STCs Work in South Australia

Adelaide and populated areas are primarily Zone 3 (factor 1.382), with outback 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.

SA STC Zone Factors

Adelaide and populated areas are primarily Zone 3 (factor 1.382), with outback regions in Zone 2 and Zone 1

Feed-in Tariffs in South Australia

South Australian retailers offer some of the highest feed-in tariffs in Australia, typically ranging from 5 to 12 c/kWh. The competitive market and high electricity costs make solar particularly attractive for SA households.

SA has among the highest feed-in tariffs in Australia, making solar export particularly valuable. Compare rates at EnergyMadeEasy.gov.au.

STC Rebates in Adelaide

A 5.0 kW solar system installed in Adelaide (postcode 5000) in 2025 will generate 41 STCs, worth approximately $1,558. This rebate is deducted directly from your installation cost upfront.

Adelaide's STC Zone Factor

Adelaide 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 Adelaide

Adelaide receives an average of 7.0 hours of sunshine per day, providing excellent conditions for solar energy generation. A 5.0 kW system typically generates 21-25 kWh per day in Adelaide, which covers most household electricity needs.

With the STC rebate reducing upfront costs, Adelaide households typically see payback periods of 3-5 years for solar systems.

STC Rebates in Mount Gambier

A 6.6 kW solar system installed in Mount Gambier (postcode 5290) in 2025 will generate 46 STCs, worth approximately $1,748. This rebate is deducted directly from your installation cost upfront.

Mount Gambier's STC Zone Factor

Mount Gambier is located in Zone 4 with a rating factor of 1.185. Zone 4 areas receive fewer STCs due to lower solar irradiance.

Mount Gambier is in Zone 4, receiving fewer STCs due to its southern location and lower solar irradiance.

Why Solar Works Well in Mount Gambier

Mount Gambier receives an average of 6.2 hours of sunshine per day, providing excellent conditions for solar energy generation. A 6.6 kW system typically generates 18-22 kWh per day in Mount Gambier, which covers most household electricity needs.

With the STC rebate reducing upfront costs, Mount Gambier households typically see payback periods of 4-6 years for solar systems.