Rodan installs 50 MWh battery storage at St. Marys Cement plant in Bowmanville, Ontario

Rodan Energy Solutions is partnering with St. Marys Cement to install a 50 MWh battery energy storage system at the cement plant in Bowmanville, Ontario. The behind-the-meter BESS will charge during low-demand periods, when Ontario's grid runs mostly on nuclear and renewables, and discharge during peak hours to cut electricity costs and avoid natural gas peaker power. Commercial operations are expected to start in May 2028, with Rodan owning and operating the system under an energy-as-a-service model. The battery will also support St. Marys' existing demand response program, letting the plant cut grid consumption to near zero during peaks by combining battery discharge with curtailment of its grinding process. Rodan estimates the system will offset about one tonne of CO2 per MWh used during peak periods. The company says it has 10 similar projects in its pipeline across Ontario, Alberta, and New York, pointing to growing interest in industrial behind-the-meter storage as a way to improve competitiveness and ease grid pressure.