The capacity of renewable energy projects seeking to issue large-scale generation certificates (LGCs) in Australia has been limited this year, the country's Clean Energy Regulator (CER) said on 28 August.
Approvals of commercial and industrial scale projects have also been below historical averages, with registrations impacted by lower LGC prices in recent years, CER said in its latest quarterly report for April-June.
A total of 359MW of renewable energy capacity is under assessment for issuing LGCs as of end-June, CER said. This is lower than the 691MW under assessment as of 22 August 2025, and 1.2GW as of 31 December 2025, published in past CER reports.
Approved capacity in January-June is at 1.5GW and is also 17pc lower on the year.
Approvals for projects of 100kW-1MW capacity, typically commercial and industrial rooftop solar facilities, was at 28MW in January-June. The figure is about half that of the same period in 2025, and about a third of the same period in 2024.
Utility-scale projects fared relatively stronger, with 1.4GW approved in January-June, roughly 17pc lower on the year.
Future approvals pipeline could rise especially if large projects join the queue, CER said. It expects at least one large power station to apply in July-September.
An upcoming rule change that will allow 100kW-1MW projects to register for issuing small-scale technology certificates (STCs) could boost this sector, CER said.
An LGC and an STC both represent 1MWh of renewable energy. But STCs are usually converted to cash discounts upfront when renewable energy projects are installed, while LGCs are usually sold later when power is generated.
LGC market sentiment and prices strengthened in April-June because of "increased expectations of future demand from data centres", CER said, mirroring what market participants told Argus in recent months.
Argus assessed spot LGCs at A$6.75/MWh ($4.86/MWh) at the end of June, before peaking at A$9/MWh around mid-August. The assessment fell to A$7.25/MWh on 27 August.
Recent policy proposals regarding data centres have centred around mandating new projects to come with new renewable generation investments, with unbundled energy certificates mostly for plugging shortfalls.
The number of facilities registered for issuing renewable energy guarantees of origin (Regos) — the successor scheme to LGCs after 2030 — has risen to 12, with total capacity at 546MW. But all facilities to date were already previously accredited for LGCs and does not represent additional generation capacity, CER said.
CER has also started tracking large-scale energy storage projects, which can issue Regos. A total of 4.2GWh of large storage capacity either reached final investment decision or started operating in April-June, bringing the total since 2021 to 51.4GWh, it said.
Battery storage projects have also gotten larger, with the median size at 525MWh to date in 2026, up from 408MWh in 2025. About 39pc of projects have two-hour storage durations, and another 14pc have four-hour durations.

