FlexGen
Leading Energy Storage Technology Solutions
278 employees · est. 2009 · Durham, United States
TESVOLT AG
Commercial & Industrial Energy Storage Systems
161 employees · est. 2014 · Wittenberg, Germany
FlexGen is the older company (2009 vs 2014); FlexGen is the larger of the two.
Side-by-Side Comparison
| Metric | FlexGen | TESVOLT AG |
|---|---|---|
| Founded | ||
| Founded | 2009 older | 2014 |
| Headquarters | ||
| Headquarters | Durham, United States | Wittenberg, Germany |
| Employees | ||
| Employees | 278 larger | 161 |
| Industry | ||
| Industry | Energy, Renewable Energy, Semiconductor | Energy |
| Funding Stage | ||
| Funding Stage | Debt Financing | Unknown |
| Total Funding | ||
| Total Funding | $282.50M | $45.23M |
| Funding Rounds | ||
| Funding Rounds | 4 | 4 |
| Services | ||
| Services | Battery Energy Storage Solutions, Energy Management Software Integration, System Planning and Engineering, EMS Retrofit Services, Lifecycle Services, Remote Monitoring and Analytics | Battery Storage System Development, Energy Trading Services, Project Planning and Implementation, Energy Management and Control, Market Access for Renewable Energy, Partner Services and Support |
| Target Customers | ||
| Target Customers | Independent Power Producers, Energy Developers, EPCs, Municipalities and Co-ops, Utilities, Critical Infrastructure Operators | Commercial Businesses, Industrial Sector, Municipal Utilities, Agricultural Operations, Project Developers, Installers and Dealers |
| Taxonomy | ||
| Taxonomy | Energy Storage Systems, HybridOS Energy Management, Battery Energy Storage Solutions, Utility-Scale Storage, Lifecycle Services, Energy Trading Platform, System Integration, Remote Monitoring, Lithium Ion Batteries, Energy Transition, Advanced Energy Functionality, Digital Controls, Power Plant Control, Engineering Procurement Construction, Energy Management | Energy Storage Systems, Battery Storage, Commercial Energy Solutions, Industrial Energy Solutions, Utility-scale Applications, Maritime Battery Solutions, Lithium Storage Systems, Renewable Energy Integration, Carbon-neutral Manufacturing, Series Production, TÜV-certified Safety, Energy Trading Participation, Project Lifecycle Support, Intelligent Control Software |
| Website | ||
| Website | flexgen.com | tesvolt.com |
About FlexGen
FlexGen, founded in 2009, is at the forefront of the renewable energy sector with its slogan, Leading Energy Storage Technology Solutions. Specializing in energy storage technologies, FlexGen prioritizes functionality and software integration in its delivery of integrated energy storage systems. Thr...
About TESVOLT AG
TESVOLT AG, founded in 2014, is a German innovator specializing in Commercial & Industrial Energy Storage Systems. With a focus on high-performance battery storage systems, TESVOLT caters to commercial, industrial, and utility-scale needs. Their integrated approach combines proprietary control softw...
We will tell you when either one moves
BounceWatch watches FlexGen and TESVOLT AG for new funding, fast hiring, new executives and a change of software vendor. When one happens, we email you the same day.
Funding, hiring, leadership and stack changes at FlexGen and TESVOLT AG — by email.
Frequently Asked Questions
Compare FlexGen with someone else
Start typing a company name or domain.
Related Comparisons
Compiled from the BounceWatch company index. We last looked at FlexGen on 30 Mar 2026, and TESVOLT AG on 17 Jun 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.