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Deeming period decline

22 August 2017

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.

As the Small-scale Renewable Energy Scheme will end in 2030, the standard 15 year deeming period for a solar PV system will reduce by one year from 2017, and each following year, until the closure of the scheme in 2030.

This will reduce the number of small-scale technology certificates that can be created for 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 and the solar water heater calculator reflect the current deeming periods and can be used to calculate the number of STCs applied in 2017 and beyond.

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