What Flexbase Group does

FlexBase Group is a privately held Swiss holding company founded in January 2022 by Marcel Aumer and Sascha Carroccio, headquartered in Laufenburg, Switzerland. The company is developing the Technology Center Laufenburg (TZL), a 40,000+ m² integrated infrastructure campus at the Star of Laufenburg — the historical nexus of the European interconnected power grid. The project's centerpiece is the world's largest vanadium redox flow battery storage system with 1.2 GW / 2.1 GWh capacity, paired with a Sovereign AI Factory data center designed to deliver up to 480–500 MW of power for AI and hyperscaler workloads. Supporting infrastructure includes a direct 380kV grid connection (approved for 800 MW in phase 1), a district heating network that repurposes data center waste heat for surrounding municipalities, an industrial power grid for fine distribution, and a 13,000 m² solar facade generating up to 2 MW of peak power.

The core technology stack centers on vanadium redox flow batteries (VRFB), which use a non-flammable aqueous electrolyte (75% water, 25% metallic electrolyte) that is nearly 100% recyclable and rated for 30+ years of operation without significant capacity degradation. This chemistry was chosen over lithium-ion specifically to mitigate fire risk for adjacent GPU compute loads. The data center architecture uses 360-degree water cooling at up to 1.2 MW per rack. The combination of long-duration storage, high-density AI compute, and grid interconnection enables internal load balancing, renewable integration, and the sale of waste heat as a third revenue stream.

FlexBase's business model is built on four subscription/recurring revenue streams expected to begin at full commissioning in summer 2028: energy storage services (grid stabilization, frequency regulation, renewable integration), AI data center hosting for hyperscalers, district heating supply to regional municipalities and industrial facilities, and grid services leveraging battery storage. Target customers split between hyperscalers and AI companies (primary, requiring data sovereignty and high-density compute) and European energy utilities and grid operators (primary, requiring long-duration storage). Distribution is exclusively direct enterprise sales with bespoke project development — no reseller or marketplace model. Total project investment is estimated at 1–5.5 billion CHF (~$1.2–6.2B USD), privately financed through equity and funds without government involvement. The group operates through five wholly owned Swiss subsidiaries (FB Real Estate AG, FB Data AG, FB Storage AG, FB Power AG, and FlexBase Service AG) and holds 100% Swiss ownership via FlexBase Holding AG.

Name

Flexbase Group

Legal name

FlexBase Service AG

Website

https://flexbase.ch

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

AI Data Center & Energy Storage Infrastructure

NAICS

Steam and Air-Conditioning Supply (221330)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Energy Storage Asset Management (BESS/PCS/EMS) (EUAEAMAE)

akta.pro secondary industries

Ancillary Services Aggregation & Bidding Optimization (DER/VPP participation) (EUAFALAJ), SCADA/Telemetry, Data Integration & Device Connectivity for Storage/DER Control (EUAFAKAI)

Keywords

• Energy storage systems
• AI data centers
• Grid stabilization services
• Flow battery storage
• District heating networks

Headquarters

HQ city

Laufenburg

HQ country

Switzerland

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Infrastructure, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Energy Storage Services: Large-scale redox flow battery storage providing grid stabilization services, frequency regulation, and renewable energy integration support for Switzerland and Europe.
2. AI Data Center Hosting: High-performance AI data center services for hyperscalers requiring sustainable, water-cooled infrastructure with up to 480MW capacity and sovereignty guarantees.
3. District Heating Services: Waste heat utilization from data center operations sold to municipalities and industrial facilities in the region.
4. Grid Services: Grid stabilization and power supply services leveraging the battery storage system to balance renewable energy fluctuations and provide backup power.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

FlexBase Group develops and operates integrated infrastructure combining the world's largest vanadium redox flow battery storage system (>2.1 GWh / >1.2 GW) with a water-cooled Sovereign AI Factory data center at the Technology Center Laufenburg in Switzerland. Its core offerings are subscription-style services — large-scale long-duration energy storage, high-density AI compute hosting with Swiss data sovereignty, grid stabilization and frequency regulation, and waste-heat district heating for municipalities and industrial off-takers.

Product overview

FlexBase Group operates as a unified infrastructure platform combining large-scale energy storage and AI computing at its Technology Center Laufenburg. The core offering consists of the world's largest redox flow battery storage system (2.1+ GWh capacity, 1.2+ GW power output) paired with the Sovereign AI Factory (AI data center delivering up to 480-500 MW). These primary systems are complemented by a district heating network that repurposes data center waste heat for regional distribution, an industrial power grid providing direct 380kV grid connectivity, and a solar facade generating additional renewable power. The architecture creates an integrated energy and data infrastructure where the battery storage stabilizes the grid against AI computing load fluctuations while enabling renewable energy integration.

Differentiator

Problem solved

Functional benefit

Products and services

• Technology Center Laufenburg (TCL/TZL) An integrated technology campus at the Star of Laufenburg, Switzerland, combining the world's largest redox flow battery storage system with an AI data center (Sovereign AI Factory), district heating network, industrial power grid, and solar facade across over 40,000 m². Built for hyperscalers, energy utilities, grid operators, and industrial off-takers.
• Redox Flow Battery Storage System The world's largest vanadium redox flow battery storage system with capacity exceeding 2.1 GWh and power output exceeding 1.2 GW, housed in an 88-foot-deep underground excavation. Uses a non-flammable, non-explosive aqueous electrolyte (~75% water, ~25% metallic) that is nearly 100% recyclable, with a 30+ year operational lifespan. Designed to supply 210,000 households for 24 hours or 1 million households for 5 hours, and to provide grid stabilization and frequency regulation for Switzerland and Europe.
• Sovereign AI Factory (AI Data Center) The world's first Sovereign AI Factory according to Swiss standards, providing high-density AI compute hosting with water-cooled server racks delivering up to 1.2 MW per rack, 360-degree water cooling, direct 380kV grid connection, and Swiss data sovereignty independent of GDPR or CLOUD Act extraterritorial access. Final configuration delivers up to 480–500 MW of power purely from a technical standpoint without absorbing battery storage, targeting hyperscalers and AI companies.
• District Heating Network

Quantifiable outcome

• 2.1 GWh battery capacity capable of powering 210,000 households for 24 hours
• +4 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Five partnerships are on record, tiered core and supporting.

• Invinity Energy SystemscoreStrategic or Co-development Partner · 21 May 2026Invinity Energy Systems was selected as the strategic partner to design and deliver the world's largest vanadium redox flow battery for the Technology Center Laufenburg. The British-Canadian company prevailed in a competitive selection process offering the best overall technology solution with lowest life-cycle costs (LCOS). Invinity's vanadium flow technology was chosen for its safety (non-flammability), cycle stability, and flexibility. The partnership entered the engineering phase in May 2026.
• Equans Switzerland AGsupportingImplementation/ SI/ Consulting Partner · 21 May 2026Equans Switzerland AG serves as a local Swiss partner supporting the engineering and integration of the storage system as part of FlexBase's Swissness philosophy.
• Georg Fischer AGsupportingImplementation/ SI/ Consulting Partner · 21 May 2026Georg Fischer AG serves as a local Swiss partner contributing to the project as part of FlexBase's commitment to Swiss-based supply chain and engineering expertise.
• SwissgridcoreStrategic or Co-development Partner · 23 January 2026Swissgrid approved the grid connection for the first expansion phase of the Technology Center Laufenburg with 800 MW capacity. Swissgrid operates Switzerland's transmission network spanning over 6,700 kilometers and 147 substations. The partnership enables direct connection to the European power grid at the Star of Laufenburg, the heart of the continental electricity network.
• Frei ArchitektensupportingImplementation/ SI/ Consulting PartnerFrei Architekten from Aarau designed the Technology Center building, described as an architectural statement that integrates technological requirements with architectural expression.

Scale indicators14 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• Wärtsilä Energy Storage: Finnish technology company providing grid-scale energy storage and optimization solutions as part of broader marine and energy portfolio. Comparable in delivering BESS for utility and grid stability applications.
• Tesla Energy: Tesla's energy business including Megapack grid storage and Powerwall. Larger, diversified incumbent operating across solar, storage, and EVs; dominant in lithium-ion stationary storage globally.
• Digital Realty: US-listed (DLR) global provider of data center, colocation, and interconnection solutions across 300+ facilities. Comparable in targeting hyperscalers and AI/cloud customers with large-scale, sustainable data center capacity.
• Equinix: US-listed (EQIX) global digital infrastructure company operating 260+ IBX data centers. Comparable in serving hyperscaler and enterprise colocation demand with high-density, interconnection-rich facilities.

Direct peers

• Form Energy: Private US company developing iron-air long-duration batteries (100+ hours) for utility-scale storage. Comparable in pursuing alternative chemistries for long-duration grid storage at multi-hundred-MW scale.
• Fluence Energy: US-listed (FLNC) global leader in grid-scale battery energy storage systems and software. Direct peer in utility-scale BESS project development, services, and digital optimization for renewables integration.
• Invinity Energy Systems: UK/Canada-based vanadium redox flow battery manufacturer selected as FlexBase's core battery technology partner. Most direct comparable due to identical flow battery chemistry and shared long-duration storage focus.
• ESS Inc. US-listed (GWH) manufacturer of iron flow batteries targeting long-duration stationary storage. Comparable technology category (aqueous flow chemistry) and target use cases in grid storage and renewables integration.
• Eos Energy Enterprises: US-listed (EOSE) provider of zinc-based battery storage systems for utility, commercial, and industrial customers. Competes in the same alternative-chemistry long-duration storage segment.

Emerging players

• Energy Vault: US-listed (NRGV) developer of gravity-based and hybrid long-duration energy storage solutions. Emerging player pursuing alternative long-duration storage technologies with overlapping customer base in utilities and renewables developers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/flexbase_group
• YouTubeyoutube.com/channel/UCpkIrAHRa8sOFAUmH7fJKPQ
• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/flexbase-group
• Instagraminstagram.com/flexbase.group

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Flexbase Group