Ontario IESO procures 640MW energy storage in LT2 Request for Proposals

June 16, 2026

LT2 follows the IESO’s Long-Term 1 (LT1) competitive tender, which previously resulted in the largest battery energy storage system (BESS) capacity procurement in the Canada’s history, awarding over 850MW of BESS capacity contracts across two tranches during May and June 2023. Image: Pexels/Burst

Ontario, Canada’s Independent Electricity System Operator (IESO) has secured 640MW of new capacity through three projects selected under the capacity stream of the Second Long-Term Request for Proposals (LT2).

LT2 follows the IESO’s Long-Term 1 (LT1) competitive tender, which previously resulted in the largest battery energy storage system (BESS) capacity procurement in the Canada’s history, awarding over 850MW of BESS capacity contracts across two tranches during May and June 2023.

LT2 was announced in August 2024, aiming to procure 3TWh of energy generation, alongside 600MW of new capacity resources.