Hgs Holding Gmbh

What Hgs Holding Gmbh does

H.G.S. GmbH (operating as HGS, headquartered in Krefeld, Germany) is a specialized full-service provider for combined heat and power (CHP / BHKW) plants and stationary gas motors, in operation since 1980. The company services engines running on all common gas types — biogas, natural gas, landfill gas, mine gas, and sewage gas — from major manufacturers including MWM (a Caterpillar subsidiary, for which HGS is an official contract partner) and MAN Energy Solutions (cooperation partner). Its service portfolio spans new plant planning and construction (modules from 4.5 to 4,500 kWel), preventive and 24/7 emergency maintenance, mechanical component machining in a 2,000+ m² Krefeld workshop, four tiers of engine overhaul (Classic, Classic+, RePower, RePower+), retrofit services (SCR catalyst, turbo upgrades), and a central spare parts warehouse holding over 6,000 stock-keeping positions with 24-hour delivery in Germany.

HGS operates a field-sales-driven B2B model across 13 German locations and 15 European sites, supported by more than 60 fully equipped service vehicles for on-site intervention. Revenue is generated primarily through recurring maintenance and service contracts, project-based new plant construction, spare parts sales, mechanical processing work, and engine overhaul projects — all on a quote-based, multi-year contract structure with no public pricing. The customer base spans CHP plant operators across agriculture, industry, municipalities, and healthcare, with 1,600+ plants under service and aggregate capacity exceeding 1,000 MW. Since approximately 2014–2015, HGS has been a wholly-owned subsidiary of ENGIE Group (ENGIE Deutschland GmbH), which provides access to contracting, financing, and new plant construction capabilities beyond HGS's organic specialist scope.

Name

Hgs Holding Gmbh

Legal name

H.G.S. GmbH

Website

https://hgs.eu

Company type

Private

Founded year

1980

Operating status

Operating

Short description

HGS is a German full-service specialist for combined heat and power (CHP) plants and stationary gas motors, serving 1,600+ plants across Europe with maintenance, overhauls, retrofits, spare parts, and new plant construction, operating as an ENGIE Group subsidiary since 2015.

Ownership category

akta.pro rank

Product category

Industrial Power Plant Maintenance Services

NAICS

Plumbing, Heating, and Air-Conditioning Contractors (238220), Steam and Air-Conditioning Supply (221330)

SIC

Cogeneration Services & Small Power Producers (4991), Refrigeration & Service Industry Machinery (3580)

akta.pro industry

PRIMARYEUACAKAA

Natural Gas CHP (Industrial & Utility-Scale)

Energy, Utilities & Environment/Electric Power Generation/Combined Heat & Power (CHP) / Cogeneration

SECONDARYEUALALAB

Captive & Embedded Gas-Fired Power Generation (Industrial/Commercial CHP)

Energy, Utilities & Environment/Oil & Gas (Upstream, Midstream, Downstream and Refining)/Gas-to-Power & Industrial Gas Supply (CNG/LNG for Industry, Captive Power)

SECONDARYEUAEAFAE

HVAC & Industrial Ventilation (Chillers, AHUs, Exhaust, Filtration)

Energy, Utilities & Environment/Energy Infrastructure & Services (EPC, O&M, Field Services)/Mechanical, Electrical & Plumbing (MEP) for Energy Facilities

Keywords

• CHP plant service
• Gas engine maintenance
• BHKW service
• Engine overhaul
• Industrial energy services

Headquarters

HQ city

Krefeld

HQ country

Germany

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Maintenance and Service Contracts: Recurring service contracts providing scheduled maintenance and emergency support for CHP plants and gas motors, covering all major manufacturers. Includes oil management, vibration measurement, and electrical maintenance per DGUV 3.
2. Spare Parts Supply: Sale of more than 6,000 original spare parts from the central warehouse in Krefeld with additional decentralized regional warehouses. Includes Xchange exchange motors and parts from MWM and exchange engines on call for common MWM motors.
3. New Plant Planning and Construction: Turnkey CHP/BHKW new plant planning, design, and construction for all gas types including biogas, natural gas, landfill gas, mine gas, and sewage gas. Includes modules from 4.5 to 4,500 kWel, containerized or building-integrated solutions.
4. Mechanical Component Processing: Machine shop services for overhauling engine components including crankshafts, camshafts, engine blocks, and connecting rods — delivering up to 60% cost savings versus new parts.
5. Engine Overhaul / Generalüberholung: Four-tier overhaul service (Classic, Classic+, RePower, RePower+) for gas motors from all renowned manufacturers. Replacement engines and rental modules available during overhaul period.
6. Retrofitting and Modernization: Retrofit services including SCR catalyst retrofit, turbo upgrades, and modernizing components of existing CHP plants to improve efficiency and meet current emissions standards.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

H.G.S. GmbH is a full-service B2B provider for operators of combined heat and power (CHP/BHKW) plants and stationary gas engines, covering all gas types (biogas, natural gas, landfill gas, mine gas, sewage gas). The company delivers scheduled maintenance, 24/7 emergency repair, complete engine overhauls (four tiered concepts), mechanical component machining, retrofitting (SCR catalyst, turbo upgrade, NOxCO-Box), and a central spare parts warehouse with over 6,000 stock items. It also plans and builds new CHP plants and offers financing and contracting via its parent ENGIE Group.

Product overview

HGS (Hgs Holding Gmbh) is a full-service provider for combined heat and power (CHP/BHKW) operators and gas engine owners, operating as part of the ENGIE group since 2014/2015. The company offers a comprehensive portfolio of services organized around four core areas: BHKW/CHP service covering new plant planning, maintenance, and modernization for all gas types (biogas, natural gas, landfill gas, mine gas, sewage gas); Gas engine service including maintenance, overhaul, and repair; a fully-equipped workshop in Krefeld (over 2,000 m²) with mechanical processing capabilities for engine components; and spare parts supply with over 6,000 items in stock plus replacement motors on call. Key products include SCR catalyst retrofits, NOxCO-Box emission monitoring, Turbo-Upgrade for MWM TCG motors, and the HGS control system. The company maintains 13 locations in Germany and a European network, serving over 1,600 CHP plants with more than 100 MW total capacity.

Differentiator

Problem solved

Functional benefit

Products and services

• BHKW Service (CHP Service) Full-service maintenance, repair, and management for combined heat and power (CHP) units running on biogas, natural gas, landfill gas, mine gas, and sewage gas. Targeted at industrial, commercial, municipal, agricultural, and healthcare CHP plant operators in Germany and Europe.
• Gasmotoren-Service (Gas Engine Service) Professional preventive maintenance and repair services for stationary gas engines following detailed manufacturer-defined maintenance and repair plans. Covers gas motors from all major manufacturers (including MWM and MAN). Intended for operators of industrial and commercial gas motor installations.
• Neuanlagen (New CHP Plant Planning and Construction) Turnkey planning, design, construction, and commissioning of new CHP/BHKW installations for all gas types with module sizes from 4.5 to 4,500 kWel, including containerized and building-integrated solutions. Includes consulting on financing and contracting supported by ENGIE. Targeted at industrial plants, hospitals, residential buildings, and municipalities.
• Grundüberholung (Complete Engine Overhaul) Four-tier complete engine overhaul service for gas motors: Classic (in-shop, 3-4 weeks downtime), Classic+ (exchange engine, 1-2 weeks), RePower (used GenSet, 3-5 days), and RePower+ (new module, minimal downtime). Workshop capacity supports up to 100 overhauls per year in the Krefeld facility.
• Instandsetzung (Engine Repair and Damage Restoration) Damage analysis, repair, and replacement module services for gas engines following incidents. Includes evaluation of repair versus upgrade options and provision of replacement engines during the repair period.
• Wartung & Instandhaltung (Scheduled Maintenance and Unscheduled Repair) Scheduled preventive maintenance and unscheduled repair services for CHP units and gas engines, including oil management with used oil analysis, vibration measurement, and electrical maintenance per DGUV 3. Delivered via recurring service contracts with 24/7 emergency support across Germany and Europe.
• Mechanische Bearbeitung (Mechanical Component Machining) In-house machine shop services for overhauling and machining engine components including crankshafts (up to 3,500 mm), engine blocks (up to 8,000 kg), camshafts, and connecting rods (up to 1,000 mm). Includes 6 overhead cranes up to 40,000 kg capacity, milling, boring, and lathes up to 5,200 mm. Achievable cost savings up to 60% versus new parts.
• Ersatzteile (Spare Parts Supply) Sale of more than 6,000 original spare parts from the central warehouse in Krefeld, plus Xchange exchange motors and parts from MWM and additional decentralized regional warehouses. Delivery within 24 hours in Germany.
• SCR Katalysator Nachrüstung (SCR Catalyst Retrofit) Standalone retrofit service installing Selective Catalytic Reduction (SCR) catalysts onto existing CHP/gas engine installations to reduce NOx emissions and comply with TA Luft and 44. BImSchV regulatory requirements.
• Turbo-Upgrade for MWM TCG Motors Standalone turbocharger upgrade solution specifically engineered for MWM TCG series gas engines to improve output performance and efficiency.
• NOxCO-Box (NOx Measurement and Documentation System) Standalone measurement and documentation device for NOx values on CHP/gas engine installations, enabling operators to monitor emissions and meet regulatory documentation requirements.
• HGS Steuerung (HGS Control System) Proprietary control system for CHP installations enabling operators to monitor and manage their plants.

Quantifiable outcome

• Up to 60% cost savings on engine component overhaul compared to new parts
• +4 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered core, major and minor.

• ENGIE Deutschland GmbH (ENGIE Group)coreStrategic or Co-development Partner · 1 January 2014ENGIE Group acquired HGS in 2014/2015, integrating it as a subsidiary within ENGIE Deutschland. This gives HGS access to corporate resources, specialist expertise in contracting, financing, new plant planning and construction, and the backing of a major international energy group. HGS retains its agile specialist identity while benefiting from group scale and capabilities.
• MWM GmbH (Caterpillar subsidiary)coreTechnology or IntegrationHGS is an official MWM contract partner (Vertragspartner) with direct access to MWM's technical expertise, original parts, and manufacturer support. HGS technicians receive regular training directly from MWM and hold all competency classes for MWM engine types including the TCG 2032 series. MWM exchange engines (Xchange) and parts are sourced through this partnership.
• MAN Energy SolutionsmajorTechnology or IntegrationHGS is a MAN cooperation partner (Kooperationspartner) for gas motor service, enabling it to service MAN engines alongside its MWM-certified capabilities. This broadens the manufacturer's service network while giving HGS access to MAN parts and technical support.
• XING SEminorGTM or Marketing PartnerHGS maintains a company profile on the XING professional network, using it as an employer branding and professional networking channel. XING is a German business social network.
• LinkedIn (Microsoft)minorGTM or Marketing PartnerHGS maintains a corporate presence on LinkedIn (linkedin.com/company/hgs-gmbh) for company content, industry updates, and recruitment visibility. LinkedIn is used as a professional content and employer branding channel.

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Rolls-Royce Power Systems (MTU): MTU/Rolls-Royce Power Systems supplies gas engine and genset solutions and provides lifecycle service to CHP operators in Europe, overlapping with HGS's mid-to-large industrial CHP service market.
• MAN Energy Solutions: MAN is HGS's second major manufacturing partner for gas engines and operates its own service organization across Europe. It represents an adjacent competitor with a broader industrial portfolio.
• MWM GmbH (Caterpillar): MWM is HGS's core manufacturing partner and a Caterpillar subsidiary producing TCG-series gas engines. It also runs its own service network and could be viewed as both a partner and a competitor for end-customer service contracts.
• Caterpillar (Gas Engine Service): Through its ownership of MWM, Caterpillar provides gas engine service and parts across Europe. As a global incumbent, it competes for large industrial and utility CHP service contracts that HGS also targets.
• INNIO Jenbacher (INNIO Group): INNIO manufactures and services Jenbacher and Waukesha gas engines globally. While primarily a manufacturer, it operates a large direct service network that competes for the same CHP operator customers HGS serves.
• Viessmann Industrial Solutions: Viessmann operates a broad industrial energy solutions portfolio including CHP, heat pumps, and heating systems. It competes in adjacent energy service markets in Germany and Europe with overlapping customer relationships.

Regional players

• ETW Energietechnik: ETW is a German service and engineering company for CHP and gas engine installations. It directly competes with HGS for German operators but has a more regional footprint and narrower product portfolio.

Direct peers

• 2G Energy: 2G Energy is a German manufacturer and service provider of CHP gas engines, with a parallel mix of new plant, service, and spare parts businesses and a similar DACH-centric customer base. It is the most directly comparable competitor in the CHP gas engine space.
• SenerTec Kraft-Wärme-Kopplung: SenerTec is a German specialist in small-scale CHP systems (Dachs) with an installed base that requires ongoing service — overlapping with HGS's micro-to-mid CHP service market and biogas/biomethane capabilities.

Emerging players

• KraftWerk Engineering GmbH: A German specialist in BHKW engineering, control systems, and service. It competes in the same DACH CHP service niche as HGS but is smaller and more focused on controls/retrofit rather than full mechanical overhauls.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/hgs-gmbh

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

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 Hgs Holding Gmbh