IESO Open to Broader Range of Storage Technologies in Long Lead-time Procurement
Hydro Redevelopments Ruled Out
Diagram of a compressed air energy storage (CAES) system using renewable electricity to store compressed air in underground salt caverns, which can be combined with green hydrogen stored in co-located caverns to generate electricity. | Corre Energy/Long Duration Energy Storage Council
Nov 20, 2025
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IESO is considering a broader range of long-duration energy storage technologies in its upcoming long lead-time procurement (but will not include hydroelectric redevelopments, officials told stakeholders.
