Ontario IESO Contracts for Large Scale Flow Battery Storage with SunEdison

SunEdison, Inc.

, the largest global renewable energy development company, today announced that it has signed a 10-year agreement with Ontario's Independent Electricity System Operator to supply 5 megawatts—20 megawatt-hours—of battery storage to the province. The Ontario IESO works at the heart of Ontario's power system, and is responsible for making sure everyone in the province gets the electricity they need, when they need it. In addition to leveraging the battery's storage capability, 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. This project is SunEdison's first commercial large scale grid-connected energy storage project, and is one of the first commercial applications of flow batteries in Canada. "By integrating energy storage into their grid, the Ontario IESO gains access to a powerful new tool that has the potential to