Guides, checked 4 November 2026
STC guides for the trade
Everything we have written about small-scale technology certificates, in plain terms, with every figure dated and sourced. Start with what you are trying to do.
Selling STCs
Prices, payment, paperwork and who to trust.
- STC price: what an STC is worth
The $40 clearing house cap, recent market trades, and what traders pay.
- How to sell STCs
The three ways to turn STCs into money, what a complete claim needs, and how fast each route pays.
- How STC trading works
From the system owner's assignment to the sale, and the three ways to get paid.
- How to choose an STC trader
What to check on price, payment, contract and risk before you assign a certificate.
- GST on STCs
When GST applies, who invoices whom, and how the discount looks on the customer's invoice.
- The STC assignment form
What the form does, what the regulator says it must contain, and who signs it.
- The STC clearing house
The $40 price, the transfer list, the surplus, and when selling there makes sense.
How STCs work
What a certificate is and how many a job earns.
- STC calculator
STCs and dollars for a panel or battery job, by postcode and install date.
- What is an STC?
Small-scale technology certificates in plain terms: who creates them, who has to buy them, and what one is worth.
- STC zones and zone ratings by postcode
Every postcode range and its zone, what the four ratings mean, and how they change what a job is worth.
- The STC deeming period to 2030
Why panel STCs fall every January, by how much, and what a year's delay costs on a job.
- Battery STCs for retailers and installers
Factors by install date, the taper, and the paperwork that holds up claims.
- Mid-scale solar STCs: 100 kW to 1 MW
The 2026 expansion of the scheme: who is eligible, the fixed five-year deeming period, and when claims open.
- STCs for heat pumps and solar hot water
Why the count comes from the regulator's register by model and zone, the factor by install year, and the paperwork a hot water claim needs.
Where we buy
Selling STCs in your state
One price everywhere. Each page shows the zones, what a job in the capital earns, the state's electrical safety paperwork and the state programs that sit beside the STCs.
- Victoria
Melbourne is zone 4: a 6.6 kW system earns 39 STCs in 2026.
- New South Wales
Sydney is zone 3: a 6.6 kW system earns 45 STCs in 2026.
- Queensland
Brisbane is zone 3: a 6.6 kW system earns 45 STCs in 2026.
- Western Australia
Perth is zone 3: a 6.6 kW system earns 45 STCs in 2026.
- South Australia
Adelaide is zone 3: a 6.6 kW system earns 45 STCs in 2026.
- Tasmania
Hobart is zone 4: a 6.6 kW system earns 39 STCs in 2026.
- The ACT
Canberra is zone 3: a 6.6 kW system earns 45 STCs in 2026.
- The Northern Territory
Darwin is zone 2: a 6.6 kW system earns 50 STCs in 2026.
Send us one job and see how it goes
There is no cost, lock-in or minimum, and you can keep your current trader.