Turnkey power generator sets, standby power systems and H2 energy technologies – engineering, manufacturing, testing and service from a single source.
Frerk Aggregatebau GmbH
Schweringen (HQ) · BickenbachNew on Amplifa
About FRERK – Backup power supply since 1964
Since 1964, Frerk Aggregatebau GmbH has developed and manufactured power generation systems ranging from standardized (emergency) power generator sets to highly complex, turnkey standby power systems (NEA) with UPS in low and medium voltage. The range of services includes standby power systems for critical infrastructures, hydrogen fuel cell and engine systems, black-start generator sets, combined heat and power (CHP) units, offshore gensets for oil & gas, OEM packaging as well as standard gensets from 3.5 to 110 kVA; solutions up to 10 MW per unit. FRERK operates as a manufacturer-independent system integrator and delivers every performance level from a single source: design, manufacturing on 21,000 m² of production floor space in Schweringen, full-load testing in its own test field in accordance with ISO 8528, worldwide transport coordination, assembly, commissioning and long-term after-sales service including a 24/7 emergency service. With 230 employees, the company supplies industries such as data centers, healthcare, traffic control, industry and decentralized power supply.
- Site
- Schweringen
- Processes
- Manufacturing of (emergency) power gensets and standby power systems in single-unit or series, Welding work in single-unit and series production, assembly and repair (certification to DIN, Engineering: technical design, planning and calculation of power gensets and, Full-load testing with inductive load banks for gas- and diesel-powered systems in accordance with, System integration: manufacturer-independent integration of engines, generators, batteries and, Assembly & installation: turnkey on-site assembly and electrical installation (low and, Container construction / containerization of gensets (production hall with almost 8,000 m², Repair and overhaul of diesel engines, generators and switchgear (manufacturer-independent)
- Materials
- Diesel, Gas (natural gas, biogas, sewage gas, liquefied gas), Hydrogen, HVO, Petrol, Steel
- Certificates
- ISO 9001:2015, DIN ISO 3834 (certified welding company), Certified company under AwSV, EcoVadis Bronze Medal
- Founded
- 1964
- Employees
- 230
- Industries
- Critical infrastructures (KRITIS), Data centers, Oil & gas, Decentralized power supply, Peak load & balancing energy, Healthcare
- 01
Needs analysis & concept development
- 02
Design & project engineering
- 03
Manufacturing & container construction
- 04
System integration
- 05
Full-load testing in the test field
- 06
Transport
- 07
Assembly & installation
- 08
Commissioning
- 09
After-sales service & 24/7 emergency service
Energy Sources & Materials
Diesel
Fuel for (emergency) power generator sets and standby power systems, in particular for full-load testing of gas- and diesel-powered systems.
Gas (natural gas, biogas, sewage gas, liquefied gas)
Energy source for CHP systems and standby power systems depending on availability and economic viability.
Hydrogen
Energy source for CO₂-free standby power systems with hydrogen fuel cells and engines.
HVO
Renewable fuel as an alternative to fossil diesel for power generator sets.
Petrol
Fuel for petrol-powered (emergency) power generator sets.
Steel
Material for container construction and welding work in single-unit and series production in accordance with DIN ISO 3834.
Locations
Schweringen
DEHeadquarters, production and test field (21,000 m² of production floor space, of which 8,000 m² climate-neutral for
- Lot size
- Single-unit production to series production
- Materials
- Steel (containers, welding work); gensets with diesel, gas, H2, HVO, petrol
- 19 test beds with inductive load banks for full-load testing in accordance with ISO 8528
Bickenbach
DEService location for manufacturer-independent after-sales service (since 2019)
Balge
DEFounding location 1964 (later relocation to Schweringen)
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacturing of (emergency) power gensets and standby power systems in single-unit or seriesAssembly | – | – | – | 1 (single-unit production) – Series | Steel (hall/container-related, unspecified) |
| Welding work in single-unit and series production, assembly and repair (certification to DINJoining | – | – | – | – | Steel (unspecified) |
| Engineering: technical design, planning and calculation of power gensets andEngineering | – | – | – | – | – |
| Full-load testing with inductive load banks for gas- and diesel-powered systems in accordance withTesting | – | – | – | – | – |
| System integration: manufacturer-independent integration of engines, generators, batteries andAssembly | – | – | – | – | – |
| Assembly & installation: turnkey on-site assembly and electrical installation (low andAssembly | – | – | – | – | – |
| Container construction / containerization of gensets (production hall with almost 8,000 m²Assembly | – | – | – | – | Steel (containers, unspecified) |
| Repair and overhaul of diesel engines, generators and switchgear (manufacturer-independent)Assembly | – | – | – | – | – |
| Overhaul of used gensets (mechanical and electrical components)Assembly | – | – | – | – | – |
| Manufacturing of electrolysers on behalf of customersAssembly | – | – | – | – | – |
| Modernization & retrofitting of existing standby power systemsAssembly | – | – | – | – | – |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Test bed (full-load testing with inductive load bank) | – | 19 | – | – | Schweringen |
Additional services
Quality & Management System
All systems are tested in the company's own test field in Schweringen with inductive load banks under full load in accordance with ISO 8528. The company is certified to ISO 9001:2015, as a certified welding company to DIN ISO 3834 and as a certified water management company (AwSV).
| Evidence | Schweringen |
|---|---|
| ISO 9001:2015 | |
| DIN ISO 3834 (certified welding company) | |
| Certified company under AwSV | |
| EcoVadis Bronze Medal |
Company History
- 1964
Volker Frerk founds an electrical machine building company in Balge; first gensets with outputs up to 0.64 MW.
- 1978
Relocation to Schweringen: construction of the first large production hall in the industrial estate, today's HQ.
- 1994
Change of shareholders: the shares are taken over by the employees Uwe Fiebiger, Horst Depine and Erich Hiller; 30 employees.
- 2001 & 2004
Two further production halls with four modern test stations each are built; full-load testing before delivery becomes a central quality component.
- 2008
Construction of hall 3, manufacturing space grows to 11,000 m²; certification to ISO 9001:2008.
- 2010
Expansion of the production area and new office building; total area reaches 25,000 m².
- 2013
Complete services from a single source; certification to DIN ISO 3834 for welding work in single-unit and series production, assembly and repair.
- 2014
50th company anniversary; 130 employees and a worldwide customer base.
- 2018
Recertification to ISO 9001:2015.
- 2019
Opening of the service location in Bickenbach for manufacturer-independent after-sales service.
- 2024
60th anniversary; over 200 employees, expansion of the service team and intensified globalization.
- 2025/2026
Construction of hall 6 (approx. 8,000 m², climate-neutral for container gensets) and a new service location; expansion of the test field to 19 test beds by Q3 2026.