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Deeming period decline

07 December 2016

Under the Small-scale Renewable Energy Scheme, small-scale technology certificates are calculated based on system location, installation date, and the amount of electricity generated over the course of its lifetime - which is referred to as the deeming period.

The 2017 decline in deeming marks the steady decline in deeming as the Small-scale Renewable Energy Scheme tracks to 2030, which will affect the number of small-scale technology certificates (STCs) available each year.

The decline in deeming period will see the 15 year deeming period reduced to 14 years, and by one year each year thereafter. This will reduce the number of small-scale technology certificates applied to an eligible system.

Solar PV Deeming Period in years
​​​​ Year solar (PV) system installed Deeming Period in years
before 201615​
201615
201714
201813
201912
202011
202110
20229
20238
20247
20256
20265
20274
20283
20292
20301


The Clean Energy Regulator will be closely monitoring installation dates during this time to ensure that the correct deeming period is applied. The provision of false and misleading information is an offence under the Renewable Energy (Electricity) Act 2000 and where certificates have been improperly created we may require the voluntary surrender of certificates.

The small generation unit calculator reflects the upcoming deeming periods and can be used to calculate the number of STCs applied in 2017 and beyond.

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