Generators sets for every application
Our product range ranges from standard units for private and commercial applications to complex, high-performance emergency power systems for critical infrastructures. Customer-specific designs and series units alike.
Needs-based power generation solutions
Eight product categories cover our range of backup and safety power supplies — from emergency power systems to hydrogen fuel cells and motors, combined heat & power plants and offshore solutions to quickly available series units. Each solution is optimized to meet specific technical, economic or regulatory requirements.

Rental units for flexible power supply
Standard mobile units are available for immediate use in events or emergencies. Containerized backup power systems are provided for planned temporary or permanent deployments. All rental units are delivered plug and play and professionally maintained. Our specialists will be happy to advise you on performance, transportation and installation.
Specialists for customized solutions
Customer-specific solutions have been part of Frerk's core competence for over 60 years. No location is too remote, no technical requirement too specific. Individual adaptation to spatial, technical or regulatory frameworks.


Highest quality through system integration
As an experienced system integrator, we combine motors, generators and batteries from well-known global manufacturers to create a coordinated overall solution. We supplement high-quality components for exhaust air, air conditioning, fuel supply, and sound insulation from proven OEMs as required.
Industry- and application-specific solutions
Frerk gensets are used in various industries all over the world. The engineering team develops solutions based on profound expertise and many years of experience — adapted to the specific requirements of critical infrastructures such as clinics,traffic control centers, public utilities or data centers and other diverse industrial, commercial and private applications.
Frequently asked questions
What is the difference between a genset and an emergency power system?
A genset provides power in the event of a grid failure — it starts automatically when the public power supply is interrupted. In the event of a failure, the system takes over the complete supply of entire systems, buildings or critical infrastructure. It can also be designed for peak load management or continuous operation. Emergency power systems are more complex, have additional components and are also used remotely where no electricity is available.
How does a backup power supply system work technically?
At the heart of a backup power supply system is an internal combustion engine (diesel, gas, HVO or H2), which generates electrical energy via a generator. In the event of a power failure, the automatic changeover system detects the interruption and starts the emergency power system within a few minutes. If required, a backup battery delivers to connected consumers without interruption even in the event of power fluctuations. Modern systems are fully automated, remotely monitorable and redundant — for maximum supply security.
What output ranges do Frerk generator sets cover?
Our standard units, which are available immediately, cover the entry-level range from 3.5 kVA to 110 kVA. We implement power generation solutions — even without interruption — up to 10 MW per unit.
Can the customer get a turnkey system from Frerk?
If required, the customer can obtain all services from design to installation and commissioning from Frerk with a minimum of interfaces.
Has Frerk already implemented a backup power supply with hydrogen?
To ensure the uninterrupted power supply of a drinking water transfer station and a power conversion station, we have successfully implemented solutions using hydrogen fuel cells.
How do I define the right benefit to protect my electrical loads?
Our team of experts will be happy to advise you on this and design a solution based on your circumstances and requirements that is neither undersized nor oversized.
Any more questions?
Vendor independence, well-known OEMs and long-standing partnerships
Frerk works with well-known and proven manufacturers of motors, generators, batteries and all other relevant components. Long-standing, trusting partnerships guarantee consistent quality and reliable availability. On customer request, specific manufacturers can also be integrated — vendor-independent system integration offers maximum flexibility in choosing the optimal components for every project.

We are looking forward to hearing from you!
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