What does solar cost in Adelaide?
Solar prices vary with system size, hardware, roof and switchboard. We explain each one, because a price without your home in it is only a guess.
Solar in Adelaide costs different amounts depending on system size, panel and inverter choice, roof access and switchboard work. We have found no government price range to quote. STCs reduce the upfront price, and that support falls about 20% on 1 January 2027. SunSPOT or a bill audit gives a realistic figure for your home.
Answered by Chris Bull, Managing Director Chris Bull on LinkedIn (opens in a new tab).
What moves the price
The government’s Solar Consumer Guide lists the main factors.
- System size in kW
- The brand and quality of panels and inverter
- The quality of the installation and after-sales service
- Steep roofs, difficult access or a multi-storey building
- Extras such as a switchboard upgrade, rack mounting or longer cable runs
- Adding a battery, which can be a large upfront cost
How the solar discount works
Solar earns small-scale technology certificates, or STCs. Your installer usually takes the certificates and takes their value off your price, and the amount should be clear on your quote.
The number of STCs depends on system size, your location and the deeming period. That period is 5 years for a 2026 install and 4 years for a 2027 install. The same system will earn about 20% fewer STCs next year.
The STC Clearing House price is fixed at $40 before GST, and market prices sit close to it. The REC Registry calculator shows your exact number of STCs.
What about a 6.6kW system?
A 6.6kW system with a 5kW inverter is common, and the government’s guide uses it as its example. It takes up about 29 to 32 square metres of roof.
It is no longer the typical choice everywhere. The Clean Energy Regulator reports the average new small-scale system across Australia was 10.5kW in the June 2026 quarter. The right size depends on your usage, and this guide shows how to work it out.
Cost is only half the sum
What you save depends on how much solar you use yourself. With retailer feed-in tariffs from zero to 5.5 cents per kWh at 30 June 2026, solar you use at home is usually worth far more than solar you export.
SunSPOT suggests a household system that pays for itself in about 5 years where that is possible. Actual payback depends on weather, maintenance and future electricity prices.
How to compare solar quotes
Ask each company for the same details, in writing.
- Panel and inverter brand, model and warranty
- The number of panels and the total kW
- The STC discount in dollars
- Any extra costs for your roof or switchboard
- Export limit assumptions and expected savings
- Who you call if something goes wrong
Get a price for your home
We start with your bill, then design around your roof and the way you use power. A 90-minute in-home consultation gives you a price and a detailed ROI for your home, not a brochure. Book a bill audit.
Common questions
How much should a 6.6kW solar system cost?
We have no current government price to quote. It varies with hardware and your roof, so compare itemised quotes and use SunSPOT for an independent guide.
How much is a solar system in SA?
There is no standard price. Size, hardware and installation all move it, and we quote after seeing your bill and roof.
Is there a rebate on solar panels in SA?
Yes, through federal STCs. REPS does not offer a solar panel rebate. See SA rebates for the full picture.
How much is a single solar panel?
A single panel price tells you little, because a quote also covers the inverter, mounting, wiring and labour. Compare total system prices instead.
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