FlexGen Power Systems

FlexGen

Type| Privately Held
Industry| Energy Storage
Founded| 2009; 17 years ago (2009) in Durham, North Carolina, U.S.
Headquarters|

Durham, North Carolina

United States

Area served

| Worldwide

Key people

| Kelcy Pegler (CEO)
Yann Brandt (CFO)
Pasi Taimela (CTO)
Products| FlexPack
SiteController
Fleet Manager
PowerCloud
FlexBidr
Digital Twin
Website| www.flexgen.com

FlexGen is a United States energy storage technology company. The company is headquartered in Durham, North Carolina and was founded in 2009.

FlexGen is the developer of the FlexGen HybridOS energy management system, which is capable of automating the dispatch of energy storage, renewable, and conventional power generation to provide enhanced capability and lower cost of energy.[1]

FlexGen originally designed energy storage products for the United States Military,[2] these hybrid power systems were sold to the US Marine Corps, US Army, US Navy SEALs, and the Joint Special Operations Forces-Afghanistan. Systems that were fielded in those military branches showed at least 52% reduction in fuel consumption and an 80% reduction in generator runtime.[3]

FlexGen acquired bankrupt US storage company Powin in 2025.[4]

## Venture Capital Funding

On August 3, 2015, FlexGen Power Systems completed a $25.5M Series A venture capital funding round.[5] Led by Denver-based Altira Group, the venture funding round also included investments from General Electric Ventures and Caterpillar Ventures.[6][7]

On August 25, 2021, it was announced that Apollo Global Management Inc. invested $150M into FlexGen.

## References

1. ↑ FlexGen HybridOS
2. ↑ Battlefield-Tested, Houston’s FlexGen Now Targets Oil & Gas Market
3. ↑ Getting Fuel Supplies to Troops
4. ↑ Maisch, Marija (20 August 2025). "FlexGen completes Powin acquisition, expands its battery fleet to more than 25 GWh". https://www.ess-news.com/2025/08/20/flexgen-completes-powin-acquisition-expands-its-battery-fleet-to-more-than-25-gwh/.
5. ↑ "FlexGen Power Systems secures US$25.5 million in financing". https://www.oilonline.com/news/business-activity/flexgen-power-systems-secures-us255-million-financing.
6. ↑ Fresh off capital raise, Houston energy tech company aims to triple in size
7. ↑ "FlexGen Power Systems Announces $25.5 Million Series A Funding with Altira Group, GE Ventures, and Caterpillar Ventures". July 30, 2015. https://www.caterpillar.com/en/company/innovation/caterpillar-ventures/news/flexgen-power-systems.html.

## External links

* www.flexgen.com: Official website

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