Long-duration energy storage (LDES) developer-operator Hydrostor intends to enter its compressed air storage project into Ontario, Canada’s recently announced LDES procurement.
Announced 8 May, the Ontario Independent Electricity System Operator (IESO) has launched its Long Lead-Time request for proposal (LLT RFP), aiming to procure up to 800MW of LDES, including pumped hydro.
The LLT RFP is also open to 1TWh of generation resources, and successful projects will be awarded a 40-year contract.
IESO’s LLT RFP builds on its previously announced Long-Term 1 (LT1) and Long-Term 2 (LT2) RFPs.
The LT1 RFP, at the time, resulted in the largest procurement of battery energy storage system (BESS) capacity in the country’s history, awarding over 850MW of BESS capacity contracts across two tranches during May and June of 2023.







