State / Territory Guide
Solar Panel Cost in SA (2026)
GradeSExcellentModel SA solar ROI with local electricity rates, STC rebates, and installer cost benchmarks.
Last updated: 2026-06-25 · Source label: AEMO electricity data, Australian installed-cost benchmarks, BOM/PVGIS solar assumptions, Clean Energy Regulator STC policy context
South Australia has the highest residential electricity rates in the country at around 36c/kWh, which makes every kilowatt-hour of self-consumed solar especially valuable. Adelaide gets a strong 4.8 peak sun hours per day, and at about A$1.05/W a 6.6 kW system costs roughly A$6,930 before incentives — close to A$4,200 after the national STC discount of ~A$2,700. SA also has the world's highest rooftop-solar penetration, which has two consequences: feed-in tariffs have fallen to a minimum of about 5c/kWh, and the grid occasionally curtails daytime exports when supply is high. The economics therefore hinge on self-consumption rather than export. The SA Home Battery Scheme has historically offered subsidies of up to ~A$2,000 toward storage, which suits the state's low export values and expensive evening rates. With premium electricity prices and strong sun, payback is typically 4-5 years.
Estimates based on South Australia (Adelaide) state or territory averages. Your actual cost depends on roof, equipment, installer, and financing.
Incentives & Rebates
Small-scale Technology Certificates (STCs)
National STC rebate provides ~A$2,500-3,000 upfront discount.
SA Home Battery Scheme
Up to A$2,000 subsidy for battery storage installation.
Net Metering
Minimum FiT 5c/kWh. High rates improve self-consumption case.
Top Electric Utilities
- 1. AGL
- 2. Origin Energy
- 3. SA Power Networks
Source: AEMO and retailer coverage references
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South Australia has the highest residential electricity rates in the country at around 36c/kWh, which makes every kilowatt-hour of self-consumed solar especially valuable. Adelaide gets a strong 4.8 peak sun hours per day, and at about A$1.05/W a 6.6 kW system costs roughly A$6,930 before incentives — close to A$4,200 after the national STC discount of ~A$2,700. SA also has the world's highest rooftop-solar penetration, which has two consequences: feed-in tariffs have fallen to a minimum of about 5c/kWh, and the grid occasionally curtails daytime exports when supply is high. The economics therefore hinge on self-consumption rather than export. The SA Home Battery Scheme has historically offered subsidies of up to ~A$2,000 toward storage, which suits the state's low export values and expensive evening rates. With premium electricity prices and strong sun, payback is typically 4-5 years.
Use this result
Use the calculator inputs first, then compare the result against local rates, incentives, roof conditions, and utility export rules.
Method, assumptions, and sourcesOpen this section when you want to audit the calculation behind the estimate.ShowHide
Calculation Method
SA solar payback = net installed cost after STC rebate / annual avoided electricity cost
Key Assumptions
- Policy last reviewed: 2026-06-25.
- Electricity rate uses AEMO and state benchmark retailer data.
- Solar installed cost uses Solar Choice Price Index June 2026 data.
- STC rebate estimated at ~A$2,700 for a 6.6kW system.
Data Sources
Electricity rates
AEMO and state benchmark tariff data
South Australia (Adelaide) residential electricity rate.
Solar production
BOM / PVGIS-CMSAF
SA average 4.8 peak sun hours per day.
Solar installed cost
Solar Choice Price Index June 2026
SA average installed cost for a 6.6kW system.
Incentives
Clean Energy Regulator (STC)
STC discount + SA Home Battery Scheme up to A$2,000.
Result Summary
Typical system cost (6.6 kW)
A$6,270-A$6,930
After STC discount (~A$2,700).
Annual bill savings
A$1,200-A$2,200
Highest electricity rates drive strongest savings.
Formula Assumptions Data Sources FAQ Related Links