Topic
Deeming period and the 2030 wind-down
28 pages, one place. Start with the quick answers, go deeper with the articles.
In depth 6
- Deeming period 2027: STCs per kW by zone, workedThe solar deeming period drops from 5 to 4 years on 1 January 2027. Here are the STC counts by zone and system size, and which date decides your year.
- What happens to installers when the STC scheme endsThe STC scheme closes on 31 December 2030. What that means for installer revenue, cash flow and product mix, with a 2026 to 2030 revenue model and a t…
- Renewable Energy Target wind-down: what ends in 2030The Renewable Energy Target ends in 2030. What that means for STCs, LGCs and installers: the shrinking deeming period, the final claim date and how to…
- Should I buy solar before 2027? The real mathsWaiting past 1 January 2027 costs a typical 6.6 kW system about $350 in STC discount. Here is how that stacks against rushing, price and payback.
- SRES ends 2030: what installers should plan forThe Small-scale Renewable Energy Scheme ends 31 December 2030. Here is the year-by-year revenue curve per job, and how installers can plan the four ye…
- STC scheme after 2030: what is known and what is notThe Small-scale Renewable Energy Scheme closes 31 December 2030. What happens to existing certificates, solar and batteries, and what a successor migh…
Quick answers 22
- Solar deeming period by year, 2016 to 2025The deeming period was 15 years in 2016 and has dropped by one year every January since, reaching 6 years in 2025. A 6.6 kW zone 3 system created 136 …
- Deeming period 2026: 5 years and what it is worthThe deeming period for solar systems installed in 2026 is 5 years. A 6.6 kW system earns about 53 STCs in zone 1, 50 in zone 2, 45 in zone 3 and 39 in…
- What happens to STCs after 2030, and is there a 2031 deeming period?There is no deeming period for 2031. The Small-scale Renewable Energy Scheme is legislated to end on 31 December 2030, so no STCs are created for syst…
- Why does the STC deeming period fall each year?Because the Small-scale Renewable Energy Scheme is designed to wind down to 31 December 2030. Each January the deeming period shortens by one year, so…
- Deeming period schedule by year: 2026 to 2030The deeming period is 5 years for 2026, 4 for 2027, 3 for 2028, 2 for 2029 and 1 for 2030. The scheme then ends on 31 December 2030, so the STC discou…
- What is the deeming period for solar?For a home solar system, the deeming period is how many years of expected output are turned into STCs at installation. It is 5 years for 2026, so your…
- What is a deeming period for solar?The deeming period is the number of future years of solar generation that STCs are created for up front. In 2026 it is 5 years, so a new system is cre…
- Deeming period for STCs: what it isThe deeming period is the number of years of solar generation that STCs are created for at installation. It is 5 years for 2026 installs, 4 for 2027, …
- SRES changes in 2026: what installers need to knowIn 2026 the scheme tightened battery evidence rules (March), changed battery tiers and factors (May), cut solar deeming to 5 years (January) and exten…
- Should you sell STCs before the deeming period drops?The number of STCs is set by the installation date, not the sale date, so selling earlier does not save a system from the cut. What matters is install…
- Should I install solar now or wait?Install now if the numbers work on your bills and the job can be commissioned before 1 January, because the rebate falls each year and your power bill…
- What was the solar credits multiplier and when did it end?Solar Credits multiplied the certificates earned on the first 1.5 kW of a small solar system: 5x from June 2009, 3x from July 2011, 2x from July 2012.…
- Solar deeming period by year: 2026 to 2030The small-scale solar deeming period is 5 years for 2026 installs, then 4 for 2027, 3 for 2028, 2 for 2029 and 1 for 2030. The scheme ends 31 December…
- Solar rebate drop on 1 January: what changesOn 1 January 2027 the solar deeming period falls from 5 years to 4, so the same system earns about 20 per cent fewer STCs. A 6.6 kW system in zone 3 d…
- Does the solar rebate drop every year?Yes, the solar rebate drops every year on 1 January. The deeming period falls by one year each time, from 5 in 2026 to 4 in 2027 and 1 in 2030, so the…
- What changed in the Small-scale Renewable Energy Scheme in 2026?In 2026 the SRES kept its five-year deeming period for solar, extended STCs to mid-scale solar (100 kW to 1 MW) from 1 October, and carried a battery …
- Will the government extend the STC scheme past 2030?At the time of writing, no. The Small-scale Renewable Energy Scheme is legislated to end on 31 December 2030 and no extension has been announced. An e…
- What is the history of the STC scheme, from the 2001 RECs to 2030?The scheme began as the Mandatory Renewable Energy Target in 2001, issuing RECs. On 1 January 2011 it split into small-scale STCs and large-scale LGCs…
- How many STCs does a 6.6 kW system get, 2026 to 2030?In a zone 3 city a 6.6 kW system creates 45 STCs in 2026, 36 in 2027, 27 in 2028, 18 in 2029 and 9 in 2030. At roughly $38 to $40 each, that is about …
- When does the solar rebate end?The federal solar rebate ends on 31 December 2030, but it does not stay the same until then. It falls every 1 January because the deeming period short…
- When does the STC scheme end?The STC scheme, part of the small-scale renewable energy scheme, ends on 31 December 2030. Solar certificate volumes step down each January as the dee…
- Will the solar rebate end in 2030?Yes. The federal solar rebate paid through STCs is set to end on 31 December 2030. By then it will have shrunk for four years in a row, because the de…
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