The Greek Regulatory Authority for Energy, Waste, and Water (RAAEY) has launched the country’s third auction for standalone, grid-scale, front-of-the-meter battery energy storage systems.
This auction aims to award 200 MW of storage capacity, 100 MW less than initially planned as part of the 1 GW subsidy program.
The auction will offer four-hour storage systems with a total capacity of 800 MWh. Bids must be submitted by December 23, 2024, with final results announced on February 20, 2025, after any objections are evaluated.
The auction supports the development of storage in Western Macedonia (a former coal mining region) and four municipalities in Peloponnese—Megalopoli, Tripoli, Gortynia, and Oichalia. The quota for the Peloponnese municipalities is 50 MW, with individual projects allowed up to 100 MW, or 50 MW for multiple projects by one bidder. A total of 225 MW is the maximum capacity per bidder.
The bidding cap has been raised to EUR 145,000/MW per year, compared to EUR 115,000/MW in the previous auction. Bidders must submit a letter of guarantee worth EUR 35,000/MW. In addition to the contracts-for-difference (CfD) support, the awarded projects will receive a one-time capex subsidy of EUR 200,000/MW, up from EUR 100,000/MW in the second auction.
Projects must be operational by April 2026. Earlier auctions in 2023 and 2024 awarded a total of 700 MW in battery storage projects.
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