Stem Inc., an intelligent energy storage provider, was the first customer-sited energy storage developer to help Southern California Edison meet local grid reliability needs.

The company, based in Millbrae, Calif., operates a digitally connected energy storage network.

Stem brought online some of its systems for flexible capacity in Southern California. The fleet includes North America’s largest indoor energy storage system – at 1.3 MW – at Park Place in Irvine, as well as systems at John Hancock Insurance and Soka University in Aliso Viejo. The company dispatched its fleet Nov. 9 to meet Southern California Edison’s regional winter energy needs.

As part of this integration, Stem aggregated and deployed indoor and outdoor systems featuring three types of batteries and inverters at multiple sites.

“The systems Stem has installed represent another step forward in our plans for a modernized grid that will enhance reliability and lower greenhouse gas emissions,” said Colin Cushnie, vice president of energy procurement and management at Southern California Edison.

Stem has more than 470 systems totaling 75 MWh installed or under contract and more than 3.5 million hours of run time. It has scalable, cloud-based solutions that manages customers’ systems based on usage, tariffs, and grid conditions in real time and collects data by the second and uses it to improve predictive algorithms, savings projections, hardware controls, and other performance aspects to make its platform smarter.

Stem plans to turn on its initial fleet of 85 MW systems in December.