What Freqcon does

FREQCON GmbH is a privately held German manufacturer of power electronics and stationary energy storage systems, headquartered in Rethem, Lower Saxony, and operating globally with project deployments in 32 countries. The company's product portfolio centers on three technology families: (i) battery energy storage systems (BESS) offered in multiple configurations including BESS MAX, BESS Second Life (using repurposed EV batteries at 70–80% residual capacity), BESS Custom (including sodium-ion variants), BESS FQ, BESS EV, and BESS PRO; (ii) power converters including the proprietary Multi-Source Converter (MSC) hybrid converter that connects multiple energy sources (wind, PV, batteries, fuel cells) to a common DC bus, STATCOM inverters for reactive power compensation, and the NGC Wind modular converter system for wind turbines in the 250 kW to 6.0 MW+ range; and (iii) ultracapacitor-based systems (UGS for grid stabilization and U-UPS for uninterruptible power) featuring over one million charge cycles and 15+ year service lives. All products are developed and manufactured in-house in Germany using IGBT-based liquid-cooled power stacks, and the MSC is documented at greater than 98% efficiency with a 20-year service life.

The company sells primarily through direct enterprise field sales, with a dedicated sales team ([email protected]) handling personal consultation, site visits, and turnkey project delivery that includes installation, commissioning, and ongoing service and maintenance. Pricing is project-specific and not publicly disclosed. Customer segments include transmission system operators and utilities, wind energy operators, renewable energy developers, e-mobility charging infrastructure operators, and industrial and commercial energy users. Documented reference customers include UPM Energy (Finland, 3 MW ultracapacitor FCR-N system), STATRON (Austria, 6 MW / 6 MWh medium-voltage BESS), Skeleton Technologies (hydrogen refueling peak-shaving), EnBW (sodium-ion and second-life hybrid storage), and Pohjolan Voima (Finland). Founded and led by Managing Director Norbert Hennchen alongside co-Managing Director Dr. Michael Weber, the company has accumulated 218 MWh of energy storage delivered, 45 GW of installed converter capacity, and 76 completed projects as of the most recent disclosures.

Name

Freqcon

Legal name

FREQCON GmbH

Website

https://freqcon.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

51–100 employees

Short description

FREQCON GmbH is a German manufacturer of frequency converters, battery energy storage systems, and ultracapacitor-based grid stabilization products serving utilities, wind operators, and renewable energy developers across 32 countries.

Ownership category

akta.pro rank

Product category

Power Electronics and Energy Storage Systems

NAICS

Electrical Equipment Manufacturing (3353)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Stationary Energy Storage Systems (BESS/ESS Integrators) (IMAGAHAD)

akta.pro secondary industries

BESS OEMs (Containerized Systems, Racks, Turnkey Solutions) (EUAFAAAC), Utility-Scale BESS EPC & Integration (EUAEAEAA)

Keywords

• Power converters
• Battery energy storage
• Frequency converters
• Grid stabilization
• Ultracapacitor systems

Headquarters

HQ city

Rethem

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Energy Storage Systems Sales: Sale of turnkey battery energy storage systems (BESS) in various configurations, including containerized solutions, with capacities ranging from 1 MWh to multi-MWh installations.
2. Frequency Inverters/Converters: Sale of frequency converters including Multi-Source Converters (MSC), STATCOM converters, and NGC Wind converter systems for wind turbines and renewable energy applications.
3. Ultracapacitor Systems: Sale of ultracapacitor-based grid stabilization systems (UGS and U-UPS) for frequency and voltage regulation.
4. Fast Charging Stations (FCS): Sale of containerized fast charging stations for electric vehicles with integrated LFP battery storage, providing ultra-fast charging capabilities.
5. Wind Energy Systems: Retrofit solutions and converter systems for wind energy applications, including Post EEG solutions and pitch backup systems.
6. Service and Maintenance: Ongoing service, maintenance, and support for installed systems, including on-site commissioning and maintenance activities.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels10 records

Core offering

FREQCON manufactures frequency converters and battery energy storage systems (BESS) for renewable energy and grid applications. The company designs and produces IGBT-based power electronics including Multi-Source Converters, STATCOM inverters, ultracapacitor-based grid stabilizers, wind turbine converters, and containerized fast charging stations for electric vehicles. All development and production takes place at the company's headquarters in Rethem, Germany.

Product overview

FREQCON offers a comprehensive portfolio of power electronics and energy storage solutions manufactured in Germany. The product lineup centers on three main technology families: (1) Battery Energy Storage Systems (BESS MAX, BESS Second Life, BESS Custom, BESS FQ, BESS EV, BESS PRO) spanning from standard to custom configurations including second-life and sodium-ion battery options; (2) Power Converters including the Multi-Source Converter (MSC) hybrid converter for multi-energy-source integration, STATCOM inverter for reactive power compensation, and NGC Wind converter for wind turbine applications; (3) Ultracapacitor Systems (UGS for grid stabilization and U-UPS for UPS applications) providing rapid-response energy storage. Additionally, the Fast Charging Station (FCS) integrates battery storage for high-power EV charging. All products feature modular, scalable architectures with the MSC serving as the central enabling technology across applications.

Differentiator

Problem solved

Functional benefit

Brands

• BESS: Battery Energy Storage Systems - available in configurations including BESS MAX, BESS Second Life, BESS Custom, BESS EV, BESS FQ, and BESS PRO
• MSC
• UGS
• U-UPS
• NGC Wind
• FCS
• STATCOM

Products and services

• BESS MAX High-performance battery energy storage system available in various sizes for integration across different industries.
• BESS Second Life Battery storage system utilizing repurposed electric vehicle batteries that retain 70-80% of original capacity for stationary energy storage applications.
• BESS Custom Customized battery storage solutions tailored to specific project requirements, including sodium-ion battery configurations.
• FREQCON BESS FQ Battery energy storage system for frequency regulation and grid services, available in configurations from 0.5 MW to 6 MW with scalable battery storage.
• FREQCON BESS EV Battery energy storage system designed for electric vehicle charging infrastructure applications.
• FREQCON BESS PRO Advanced battery energy storage system for professional grid applications.
• Multi-Source Converter (MSC) Hybrid converter enabling connection of multiple energy sources (wind, PV, batteries, fuel cells) to a common DC bus, supporting on-grid and off-grid operation with grid stabilization capabilities. IGBT-based modular design from 350 kW to 2 MW, scalable to >100 MW, with >98% efficiency and 20-year service life.
• UGS Ultracapacitor Grid Stabilizer Combines inverter technology for voltage stabilization with double-layer capacitors for frequency stabilization, enabling higher renewable energy integration without compromising grid stability. Features unlimited charge cycles (>1 million), 15+ year lifespan, and fire-resistant ultracapacitors.
• U-UPS Ultracapacitor Uninterruptible Power Supply Ultracapacitor-based uninterruptible power supply providing ultra-fast response for continuous power supply protection.
• STATCOM Inverter Static Synchronous Compensator enabling highly dynamic reactive power compensation in power transmission networks, contributing to reduction of transmission losses, voltage stabilization, and harmonic reduction.
• NGC Wind Converter System Modular converter system for wind turbines with liquid-cooled IGBT power stacks and ultra-fast control system, operating in 250 kW to 6.0 MW+ power range. Certified for all relevant grid directives including VDE-AR-N 4120.
• Fast Charging Station (FCS) High-performance EV fast charging station with integrated LFP battery storage in container solution. Delivers up to 500 ADC (CCS), charges up to 80% of EV battery in 15 minutes, with up to 5x grid power output through integrated storage. ROI < 3 years.

Quantifiable outcome

• Up to 5x charging power of grid connection through integrated battery storage
• +5 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Sungrow Power Supply: Sungrow is one of the world's largest inverter and BESS integrators, supplying PCS and containerized storage for utility-scale projects. It competes with Freqcon in medium-voltage BESS PCS and grid-forming converters for European TSOs and developers.
• SMA Solar Technology: SMA is a German-headquartered manufacturer of solar and battery inverters plus energy management systems, with a large utility-scale BESS PCS business — directly comparable to Freqcon's converter and BESS FQ/PRO offerings for renewable and grid-tied storage.
• FIMER (ABB Solar): FIMER (formerly ABB's solar inverter business) manufactures string and central inverters plus residential and C&I BESS power electronics. It overlaps with Freqcon's converter product lines for renewable and storage applications.
• EnerSys: EnerSys supplies industrial batteries, chargers, and energy storage systems for motive, reserve power, and grid applications. Its reserve-power and microgrid products overlap with Freqcon's BESS Custom and EV charging lines, particularly where backup and peak-shaving are required.
• Power Electronics (Spain): Power Electronics is a Spanish manufacturer of MV/LV inverters, STATCOMs, and BESS power conversion systems, with significant traction in European FCR/aFRR markets — overlapping closely with Freqcon's MSC, STATCOM, and BESS FQ portfolio.
• KACO New Energy: KACO New Energy (a Siemens subsidiary) develops power inverters and energy storage converters for renewable and grid applications, making it a direct competitor in the German and European BESS and grid-stabilization PCS market.

Broad incumbents

• Siemens Energy: Siemens Energy is a major supplier of grid technology, STATCOMs, and BESS solutions, plus wind converters competing with Freqcon's NGC Wind line. It addresses the same European utilities and renewable developers from a much larger incumbent position.
• ABB / Hitachi Energy: Hitachi Energy (formerly ABB Grid Integration) supplies STATCOMs, BESS power conversion, and grid-stabilization equipment to European TSOs. It competes with Freqcon in reactive-power compensation and large-scale BESS integration but across a much broader portfolio.
• Schneider Electric (Energy Management): Schneider Electric provides grid-tied energy storage, power conversion, and EV charging solutions. Its EcoStruxure and BESS offerings compete with Freqcon's BESS EV / FCS products in charging infrastructure and C&I storage.

Emerging players

• Skeleton Technologies: Skeleton Technologies is a European ultracapacitor manufacturer that is also a Freqcon customer (hydrogen refueling BESS) and a peer in ultracapacitor-based grid stabilization. The relationship illustrates the tight coupling between ultracapacitor suppliers and inverter integrators in the UGS/U-UPS market.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/@freqcongmbh
• Facebookfacebook.com/freqconGmbH
• LinkedInlinkedin.com/company/freqcon-gmbh
• Instagraminstagram.com/freqcon

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Freqcon