SunEdison, Imergy partner to supply 5 MW battery storage in Canada

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SunEdison has signed a 10 year agreement with Ontario’s ISEO to supply 5 MW, or 20 MWh, of battery storage to the Canadian province. Imergy’s vanadium redox flow battery technology will be employed.

Construction is scheduled to begin in the first half of 2017, with completion slated for later that year. pv magazine has contacted both parties for more details on the agreement, and battery technology.

When complete, the project will represent SunEdsion’s first commercial large scale, grid-connected energy storage project, and one of Canada’s first commercial applications of flow batteries.

"… the IESO intends to use data from this energy storage project to analyze how storage can be used to smooth the power flow from wind and solar, defer expensive system upgrades, and ultimately shape the future of its grid," said SunEdison in a statement released.

This is not the first time SunEdison and Imergy have worked together. Earlier this year, in March, the two announced a partnership under which SunEdison purchased 1,000 energy storage systems totaling 100 MWh from Imergy as part of its project to bring solar electricity to many parts of rural India.

Most recently, Imergy, headquarterd in California and with operations in India, announced a two-year exclusive partnership with Chinese investment company Juno Capital Group to serve the energy needs of the Chinese telecommunications (telcom) market.

Meanwhile, in an interview with pv magazine last year, CEO, Bill Watkins talked about the advantages of flow batteries over other types, like lithium-ion. "For anything that needs long-duration storage, the flow battery will win every time, simply because it can provide very short duration cycles, for the stability – rapid cloud cover type of things – and it can do very long duration, whereas the lithium ion and lead acid can’t do long duration very well," he said. The company's cost structure is also said to be "substantially" below the pricing for an equivalent capability delivered by lithium batteries.

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