FlexGen, Lightshift plan 55 MW/200 MWh of new US batteries

FlexGen Power Systems and Lightshift Energy have announced an expanded partnership to deploy battery energy storage system (BESS) projects across Massachusetts, Virginia, and Vermont. 

Through the partnership, Lightshift will develop, own and operate the facilities while FlexGen supplies its HybridOS energy management system (EMS).

The companies have previously completed six projects totaling more than 25 MW of power output capacity and 85 MWh of energy storage. The majority of these projects serve municipal electric utilities, including the 6 MW Groton 1 & 2 BESS installations in Massachusetts and the 10.5 MW Danville BESS 1 facility in Virginia.

At the Danville site, the companies recently completed an upgrade of the facility, which included an expansion of the battery capacity coupled with an upgrade of the battery management system and FlexGen’s EMS to enhance performance at the site.

“It’s no longer just about building more battery projects. Meeting our energy needs will require getting more from the assets we already have,” said Jason Abiecunas, executive vice president of business development at FlexGen. “That means finding ways to extend asset life, unlock additional capacity, and ensure we’re maximizing the value provided by each site. We’re proud of what we’ve accomplished through our work with Lightshift and look forward to growing that partnership.”

Going forward, the partners are working to deliver another ten installations, totaling more than 55 MW in power output and 200 MWh of storage across the PJM and ISO-NE regions. 

“Across New England and the PJM region, growing energy demand is driving utilities to explore solutions to strengthen their local grids while reducing costs for residents,” said Lightshift CTO Joe Leavitt in a statement. “Our work with FlexGen has created a strong model for the deployment of battery storage assets across sites with various technologies and unique needs. As we expand our portfolio, we look forward to building on that successful track record as we continue to help utility partners meet growing demand, manage costs for the communities they serve, and strengthen grid reliability and resilience.”

Notably, the slate of upcoming installation includes a 16 MW/52MWh behind-the-meter installation for semiconductor manufacturer GlobalFoundries in Vermont. At the time of its announcement in 2025, the company described the facility as Vermont’s largest energy storage project.

Arlington, Virginia-based Lightshift Energy is a utility-scale energy storage developer, owner, and operator founded in 2019. The six projects it has installed in partnership with FlexGen represent the majority of its 31.5 MW/102 MWh in deployed capacity. The company now touts an energy storage development pipeline of more than 16 GWh in total capacity.

FlexGen, Headquartered in Durham, North Carolina, provides software and services designed to deploy, manage, and optimize battery energy storage systems. Its HybridOS software integrates with multiple battery manufacturers to offer analytics and insights intended to help energy storage owners participate in power markets and enhance grid stability. The company says its system is compatible with more than 80 configurations of batteries and power conversion systems.

From pv magazine USA