The federal government’s Capacity Investment Scheme has awarded underwriting agreements to six wind farms, two solar-battery hybrids, and multiple long-duration storage projects. The successful bids are designed to bolster grid reliability and replace retiring thermal generation. This influx of new capacity arrives as wholesale prices soften, with NEM spot prices falling 36.5 per cent week-on-week to average $34.04/MWh amid high renewable output.
The inclusion of storage projects with seven to eight-hour discharge capacities is a notable feature of the tender results. It signals a deliberate policy push to secure firming capacity that can cover extended evening peaks and overnight lulls in wind generation. By underwriting these longer-duration assets, the CIS is actively shaping the market beyond the typical two and four-hour batteries, directly addressing emerging system security challenges.
While policy makers focus on building new supply, a major new source of demand is emerging from the transport sector. Tesla's first mass-produced Semi electric truck has rolled off the production line, marking a significant milestone in the decarbonisation of freight. The company is targeting an annual production of 50,000 units. This matters for Australia as the electrification of heavy transport will place substantial new loads on the grid, reinforcing the need for the dispatchable renewable capacity the CIS aims to deliver.
Meanwhile, regulators are laying the groundwork for the network infrastructure required to support this transition. The Australian Energy Regulator is progressing its next five-year revenue determinations for major transmission network service providers, including Transgrid, ElectraNet, and Powerlink, for periods beginning in 2027 and 2028. These crucial regulatory processes will set the spending envelopes for the poles and wires needed to connect new generation and serve growing demand centres.
At a more granular level, AEMO is consulting on specific network constraints. The market operator is currently seeking industry feedback on its draft report for capacity constraints at Victoria's Keilor Terminal Station and a separate consultation on supply reliability in Queensland's Atherton Tablelands. These targeted reviews highlight the detailed engineering and planning underway to ensure the grid remains stable as its composition fundamentally changes. Submissions for these consultations close in June and July respectively.