Durham, North Carolina-based FlexGen Power Systems and Arlington, Virginia developer Lightshift Energy said on September 16, 2026 that they have expanded their partnership to a 16-project battery energy storage fleet spanning the PJM and ISO-NE markets, with FlexGen's HybridOS energy management software running every site.
25 MW Online, 200 MWh On The Way
Six of the projects, totalling 25 MW/85 MWh, are already commercially operational, according to the two companies. The remaining ten projects — 55 MW/200 MWh of nameplate capacity — are under construction and are due to enter service in the coming quarters. Together, the fleet represents 80 MW and roughly 285 MWh of energy storage across Virginia, Massachusetts and Vermont.
How The Partnership Divides The Work
Lightshift, formerly known as Delorean Power, develops, owns and operates the individual battery sites and signs the offtake and utility contracts. FlexGen supplies the HybridOS EMS, integration services and long-term controls support. HybridOS is compatible with more than 80 battery and power-conversion system configurations, letting Lightshift standardise on a single control stack even as it mixes hardware vendors across sites in different capacity, energy and ancillary-service markets.
Danville And Groton Anchor The Portfolio
The partnership's flagship assets include the Groton, Massachusetts project — the first Lightshift site to run on HybridOS, commissioned in 2024 — and two projects in Danville, Virginia. The first Danville site was recently upgraded with a 14% capacity enhancement, and a follow-on Danville II project is planned as an 11 MW peak-shaving asset. Lightshift chief technology officer Joe Leavitt said the work with FlexGen has created "a strong model for deployment across sites with various technologies," while FlexGen executive vice president Jason Abiecunas said meeting rising US load growth will require "getting more from the assets we already have."
Interconnection Queues Push Utilities Toward Storage
The announcement lands as US utilities plan roughly 24 GW of new battery storage in 2026 while grid interconnection waits stretch further. That has pushed developers such as Lightshift toward smaller, faster-to-permit BESS assets tied directly into constrained distribution nodes rather than the multi-hundred-MW greenfield builds that dominated the 2023-2024 project pipeline.
Related coverage on The Robotics Media: BYD's 62 MWh GC Block for gigawatt-scale storage, Fluence's 206 GWh EVE Power framework, and Energy Vault buying Goshe's 2.3 GW pipeline.
Reporting based on coverage from BusinessWire, ess-news.com and pv-magazine USA.