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IESO 50MW Grid Energy Storage Procurement - Phase I (2014) and II (2015)

Following an initial procurement of two storage projects in 2012, for regulation service, Ontario's Independent Electricity System Operator (IESO)

Phase I of Ontario's Independent Electricity System Operator (IESO) Grid Energy Storage procurement initiative began in 2014.  The procurement was designed to investigate the capabilities of energy storage facilities, featuring diverse technologies, to offer either or both of the following reliability services: regulation, and reactive support and voltage control (RSVC). The procurement also required that the projects be located across different electrical zones in Ontario to evaluate their effectiveness at alleviating local constraints or restrictions. Additionally, successful projects could be dispatched to explore additional bulk electricity services such as energy shifting, providing ramping support and SBG management.'

Phase I received a significant amount of interest both within Ontario, nationally and internationally. Over 400 proposals were submitted in response to the Request for Proposal (RFP).  The IESO contracted with Canadian Solar Solutions Inc., Convergent Energy and Power LLC,  Hecate Energy,  Powin Energy,  Deltro Energy and Hydrogenics Corp to deliver 11 separate energy storage projects (9 battery, 1 flywheel, and 1 hydrogen gas project), totalling approximately 33 MW of storage capacity.  As of January 2019, these facilities are listed as in active or soon to be operation.

Phase II began in 2015, aiming to complement Phase I with an additional 16 MW of storage capacity. Phase II resulted in contacts with 9 storage projects with approximate capacity of 16.75 MW.   The IESO anticipated in January 2019 that these facilities would be in operation by November 2019. 

Friday, March 2, 2018 - 14:53
Last Updated
Thursday, November 14, 2019 - 09:46


Initiatives are (typically government-led or supported) activities to promote or facilitate the further development and deployment of energy storage in Canada, such as public-private partnerships, or targeted R&D grants or procurement programs. They may or may not have Project connections.

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