Frerk backup power supply since 1964

When reliability counts

For emergencies, uninterrupted or decentralized: We offer needs-based and reliable power generation solutions ranging from standard gensets to customized special solutions in single production or series. With all services from one source, we deliver turnkey systems that reliably meet even extreme requirements.

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Our products & services

Your partner for tailor-made
backup power supply

Frerk offers comprehensive services. We plan individual units according to your requirements, manufacture them in our modern production halls, test every system under full load in our test facility and carry out the installation on site. Project management, commissioning, training, long-term after sales service — if required, we will support your system throughout the entire life cycle. One partner, all competencies.

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Generator sets

Gensets, emergency power systems (EPS) and uninterruptible power supply (UPS) in low and medium voltage.

Installation variants

Gensets flexible for every project: mobile, container, building or underground solutions.

System integration

Connect motors, batteries generators and components from well-known manufacturers.

Test field

Full load testing of all units is possible according to the highest standards — from Q3 2026 on 19 test benches.

After Sales Service

Comprehensive service for

maximum system availability

Frerk supports your systems even after commissioning. Our services ensure maximum reliability through professional maintenance, high-quality original parts, operating materials and modern measurement methods. Repairs, modernization, test runs, training: We keep your systems performing consistently, regardless of manufacturer. Well-established logistics, comprehensive documentation, optional 24/7 emergency service.

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Gensets for every challenge

We have implemented power supply solutions for a wide range of industries and areas of application worldwide. Many years of experience and in-depth expertise form the basis for our customer-specific optimized solutions.

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Critical infrastructure

Reliable backup and safety power supplies without interruption are essential for critical infrastructures. Our emergency power systems in combination with UPS ensure this.

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Data centers

Data centers as the digital backbone of our modern society must be protected against network failures and. Uninterrupted systems are systemically relevant and essential.

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Peak load & control energy

Managing the power supply, smoothing out peaks in power demand and providing balancing energy. Efficient, economical, adaptable.

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Decentralized power supply

Independent energy supply with long maintenance intervals. Gensets for continuous durability, low fuel costs and reliable power supply.

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Oil & gas

Special solutions for the highest safety requirements. Tailored units that meet these standards: robust, safe, ready for use.

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Private & commercial

Reliable power supply for private households, events and businesses — uninterrupted and independent power supply with our standard gensets product line.

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Team & career

We need you — for real challenges!

Frerk is growing — we are looking for people to shape the future with us.
With us, you not only work on standard solutions, but also on modern backup power supply systems: remote in the Arctic Circle, offshore, climate-friendly with hydrogen, securing critical infrastructures. You help keep systems running - anytime & anywhere.

Grow with us

A guarantee for reliable power generation solutions

Since 1964, we have stood for backup power supply solutions for a wide range of applications, designed, integrated and installed as required. 220 employees work with passion and commitment. We produce on 21,000 m² of hall space, 8000 m² of which are climate-neutral for container units. 19 test benches are used for quality assurance.

Our philosophy: Know-how and expertise form the basis for our professionalism. The most complex requirements are welcome challenges in developing the optimal customer-specific solution. We build on long-term, respectful relationships with customers and partners. Consistency paired with innovation — this is how the reliable gensets and emergency power systems (EPS) from Frerk are created.

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