The Renewable Energy (Electricity) Regulations 2001 have been amended to expand eligibility for solar photovoltaic (PV) systems under the Small-scale Renewable Energy Scheme (SRES) from 100 kW to 1 MW.
These changes apply to eligible mid-scale solar systems installed from 1 October 2026. Small-scale technology certificate (STC) applications for mid-scale systems will not open until mid to late November 2026. This allows time to implement the required systems and processes. Assessment of STC applications will begin after this time.
The STC deeming period for small-scale solar systems (up to 100 kW) declines as we move towards 2030, when the scheme is scheduled to end. A key feature of the expansion is that eligible mid-scale solar systems (100 kW to 1 MW) will have the benefit of a fixed 5-year deeming period.
Participants installing solar with the capacity of 100 kW to 1 MW will be able to choose between:
- applying for the upfront financial benefit under the SRES through STCs
- operating as an accredited power station under the Large-scale Renewable Energy Target (LRET) and earning large-scale generation certificates (LGCs)
- participating in the Renewable Electricity Guarantee of Origin (REGO) and gaining REGO certificates.
Participants should carefully consider which scheme best suits their circumstances before applying, as certificate eligibility under one scheme may affect eligibility under another. For example, if you choose to apply for STCs for your mid-scale solar system, you may not be able to create LGCs or REGO certificates for the deeming period.
Preparing for 1 October
Mid-scale solar is an extension of the existing SRES. Existing SRES eligibility requirements, processes and guidance continue to apply unless otherwise specified in the regulations.
To help businesses understand the changes and support project planning see our:
We will publish further details about mid-scale solar, including:
- defining the boundaries of related solar devices and power stations
- eligibility of existing systems, extensions and upgrades
- evidence and document requirements
- application process and timeframes.
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