Überlandwerk Groß-Gerau GmbH

What Überlandwerk Groß-Gerau GmbH does

Überlandwerk Groß-Gerau GmbH (ÜWG) is a regional German municipal energy utility headquartered in Groß-Gerau, Hesse, founded in 1900 and operating with approximately 60 employees. The company operates the medium- and low-voltage electricity grid on behalf of Mainzer Netze GmbH, the licensed grid operator, covering roughly 28,000 grid connections across eight municipalities in Kreis Groß-Gerau (Biebesheim, Bischofsheim, Büttelborn, Ginsheim-Gustavsburg, Nauheim, Riedstadt, Stockstadt am Rhein, Trebur). It also operates and maintains approximately 13,000 street luminaires across nine municipalities under municipal service contracts. ÜWG is 95% owned by Mainzer Stadtwerke AG, with the remaining 5% held by Zweckverband Riedwerke Kreis Groß-Gerau.

The company's product portfolio spans electricity supply, grid connections (including construction power and emergency/UPS solutions), EEG and KWKG feed-in administration for solar and CHP systems, LED street lighting modernization with LoRaWAN smart-control integration, heat contracting for neighborhoods and public buildings, public and private EV charging infrastructure (including wallbox partnerships with The Mobility House), and renewable generation assets operated through participating companies (roughly 50 PV, 30 heat, and three biogas/biomass plants). Technical differentiation rests on Zhaga-standardized LED luminaires, LoRaWAN remote control and dimming, demand-controlled solar lighting for cycle and pedestrian paths, and participation in the Energiepark Mainz Power-to-Gas hydrogen joint venture with Linde Group and Siemens (commissioned 2015). The firm holds TSM certification (Technisches Sicherheitsmanagement) from DVGW and FNN/VDE.

ÜWG's go-to-market is sales-led and institutionally focused, with direct engagement of municipalities and businesses for contracting solutions (heat, EV charging, LED modernization), complemented by digital self-service customer and installer portals operated jointly with Mainzer Netze GmbH, and a certified installer channel for grid connection work. Revenue is generated from regulated grid operation fees, municipal street lighting service contracts, managed-service contracting for heat/PV/EV infrastructure, transaction fees from third-party-operated EV charging, and feed-in processing services. Pricing for grid, lighting, and contracting solutions is individually negotiated with municipalities and businesses; public EV charging fees flow through third-party providers. The company is privately held with no public listing and has not raised external funding.

Name

Überlandwerk Groß-Gerau GmbH

Legal name

Überlandwerk Groß-Gerau GmbH

Website

https://uewg.de

Company type

Private

Founded year

1900

Operating status

Operating

Headcount range

11–50 employees

Short description

Überlandwerk Groß-Gerau GmbH is a regional German municipal energy utility that operates the medium- and low-voltage electricity grid for ~28,000 connections across eight municipalities in Kreis Groß-Gerau and maintains ~13,000 street luminaires across nine municipalities, offering LED street lighting, EV charging, heat contracting, and renewable energy feed-in services.

Ownership category

akta.pro rank

Product category

Regional Energy Utility (Municipal Utility Services)

NAICS

Electric Power Generation, Transmission and Distribution (2211)

SIC

Electric Services (4911), Electrical Work (1731)

akta.pro primary industry

Street Lighting & Area Lighting EPC / Maintenance (EUAEACAH)

akta.pro secondary industries

Interconnection, Permitting & Grid Services for DERs (EUAMAJAH), EV Charging as DER (Managed Charging, V2G/V2B) (EUAMAJAL), Grid Interconnection, Power Quality & Electrical Infrastructure Service (Transformers, Switchgear) (TLAKAMAM), Microgrid, DER & Building Electrification Energy Controls (Solar/Storage/EV Load Orchestration) (BPABAGAJ)

Keywords

• Regional energy utility
• Electricity grid operation
• LED street lighting
• EV charging infrastructure
• Renewable energy services

Headquarters

HQ city

Groß-Gerau

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Grid operation and network services: ÜWG operates the medium- and low-voltage electricity grid on behalf of Mainzer Netze GmbH in eight municipalities (~28,000 network connections). Revenue is derived from regulated grid operation fees and related network services.
2. Street lighting services: ÜWG operates and maintains street lighting infrastructure (around 13,000 luminaires) in nine cities and municipalities. Revenue is generated through municipal service contracts.
3. Sustainability and energy efficiency contracting: Contracting solutions for heat (heating and hot water generation), PV installations, EV charging with intelligent management, and bioenergy for municipalities, residential developments, and businesses.
4. Public EV charging infrastructure operation: ÜWG operates public charging stations. Revenue comes from charging fees collected via third-party providers and payment methods (QR code, Giro card, charging cards/apps).
5. PV and energy feed-in processing: Processing of grid connection applications for PV, micro-PV (balcony), EEG, and KWKG feed-in systems on behalf of Mainzer Netze. Revenue model tied to regulated grid connection processes.

Go-to-market motion2 records

Distribution channels5 records

Marketing channels6 records

Core offering

Überlandwerk Groß-Gerau GmbH operates as a regional municipal energy utility that runs the medium- and low-voltage electricity grid on behalf of Mainzer Netze GmbH across eight municipalities (~28,000 connections), maintains street lighting across nine municipalities (~13,000 luminaires), and provides electricity supply, grid connections, electromobility (EV charging and wallboxes), heat contracting, and renewable energy generation (PV, biogas, biomass, hydrogen) to municipalities, businesses, and residential consumers in the Kreis Groß-Gerau area.

Product overview

Überlandwerk Groß-Gerau GmbH (ÜWG) operates as a regional energy utility providing an integrated portfolio of electricity, heating, and electromobility services across eight municipalities in Kreis Groß-Gerau, Hesse. The core offerings center on electricity supply (Strom), grid connection services (Netzanschluss) including construction power and emergency power solutions, and renewable energy feed-in management under EEG and KWKG for solar, CHP, and balcony PV systems. Infrastructure services include LED street lighting (LED-Straßenbeleuchtung) across nine municipalities with approximately 13,000 street lamps, and electricity metering. Electromobility offerings encompass public charging infrastructure (Öffentliche Ladeinfrastruktur), private wallbox solutions (Ladelösungen für Privatpersonen), and business/municipal charging solutions (Ladelösungen für Unternehmen und Kommunen), as well as hydrogen fuel cell vehicle infrastructure (Brennstoffzellenfahrzeuge). Sustainability initiatives include photovoltaic systems including a 5-hectare solar park in Riedstadt-Leeheim (PV-Anlagen), bioenergy from biogas and biomass plants (Bioenergie), and hydrogen energy services through the Energiepark Mainz partnership (Wasserstoff). Heating services provide contracting solutions for neighborhoods and public buildings (Wärme). The company operates roughly 28,000 grid connections and maintains about 50 PV, 30 heating, and 3 biomass/biogas generating installations.

Differentiator

Problem solved

Functional benefit

Products and services

• Strom (Electricity Supply) Electricity supply services for residential, commercial, and industrial customers in the Kreis Groß-Gerau region.
• Netzanschluss (Grid Connection) Electric grid connection services including new connections, modifications, and disconnections for residential and commercial properties across eight municipalities of Kreis Groß-Gerau.
• EEG-Einspeisung (Renewable Energy Act Feed-in) Grid feed-in services for solar and renewable energy generation systems under the German Renewable Energy Sources Act (EEG), including connection, metering, and feed-in tariff management.
• KWKG-Einspeisung (CHP Feed-in) Grid feed-in services for combined heat and power (CHP) plants under the CHP Act (KWKG), including network compatibility testing and commissioning.
• LED-Straßenbeleuchtung (LED Street Lighting) Energy-efficient LED street lighting services including planning, installation, operation, and modernization of municipal and commercial lighting systems across nine cities.
• Wärme (Heat/Heating Contracting) Heating and hot water contracting solutions including combined heat and power systems, heat pumps, and geothermal installations for neighborhoods and public buildings.
• Elektromobilität (Electromobility Solutions) Electric vehicle charging infrastructure and solutions including public charging stations, wallboxes for private use, and charging management systems for businesses and municipalities.
• PV-Anlagen (Photovoltaic Systems) Solar photovoltaic system services including a 5-hectare solar park in Riedstadt-Leeheim with 27,000 modules generating 1.9 million kWh annually, plus consulting for residential and commercial installations.
• Bioenergie (Bioenergy) Biogas and biomass energy generation including a biogas plant in Groß-Gerau/Wallerstädten with 1,086 kW electrical capacity and a wood chip heating plant in Pfungstadt-Hahn.
• Brennstoffzellenfahrzeuge (Fuel Cell Vehicle Infrastructure) Hydrogen fuel cell vehicle infrastructure including contracting solutions for fleet operators, with planning, construction, and operation of hydrogen refueling stations.
• Wasserstoff (Hydrogen Services) Hydrogen energy carrier services including involvement in Energiepark Mainz (world's largest Power-to-Gas facility), H2BZ-Initiative Hessen, and hydrogen refueling infrastructure for fuel cell vehicles.
• Stromzähler und Messtechnik (Electricity Meters & Metering Technology) Electricity metering services including meter installation, reading, and integration with customer and installer portals for digital meter management.

Quantifiable outcome

• LED conversion reduces electricity consumption for street lighting by up to 70% for municipalities
• +3 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration7 records

Feature3 records

Partnerships

Ten partnerships are on record, tiered core and minor.

• Linde Group (now Linde plc)coreStrategic or Co-development Partner · 1 January 2015Linde Group partnered with Mainzer Stadtwerke AG and ÜWG to co-finance and operate the Energiepark Mainz, the world's largest Power-to-Gas plant at its 2015 commissioning, using PEM electrolysis to produce hydrogen from renewable electricity.
• Siemens AGcoreTechnology or Integration · 1 January 2015Siemens AG was a development partner in the Energiepark Mainz project alongside Mainzer Stadtwerke AG and ÜWG, contributing technology expertise to one of the world's largest Power-to-Gas facilities.
• Mainzer Netze GmbHcoreTechnology or IntegrationMainzer Netze GmbH is the licensed grid operator for the ÜWG service area. ÜWG operates the medium- and low-voltage network on Mainzer Netze's behalf and processes customer connections, PV feed-in registrations, and meter installations as Mainzer Netze's service provider. ÜWG's parent company Mainzer Stadtwerke AG holds a controlling interest in Mainzer Netze.
• Mainzer Stadtwerke AGcoreStrategic or Co-development PartnerMainzer Stadtwerke AG is ÜWG's parent company, holding a 95% ownership stake. ÜWG also collaborates with other subsidiaries and affiliated companies within the Mainzer Stadtwerke group for services such as contracting, IT, HR (shared job portal), and sustainability initiatives.
• Meygo Charge GmbHcoreStrategic or Co-development PartnerÜWG partnered with Meygo Charge GmbH to install and operate a new fast EV charging station in Ginsheim (Bouguenais-Allee), replacing an aging station and expanding public EV charging infrastructure in the municipality.
• Hochschule RheinMainminorStrategic or Co-development PartnerHochschule RheinMain collaborates with ÜWG on hydrogen technology research projects, including test refueling of ÜWG's fuel cell pool vehicle using a portable hydrogen refueling unit (Cold-Filling module) developed in the university's hydrogen laboratory.
• H2BZ-Initiative Hessen e.V.minorStrategic or Co-development PartnerÜWG operates the secretariat of the Hydrogen and Fuel Cell Initiative Hessen (H2BZ-Initiative Hessen), the central Hessian network for hydrogen and fuel cell technology. ÜWG CEO Jürgen Schmidt serves as Deputy Chairman.
• The Mobility HouseminorChannel Partner/ Reseller/ DistributorÜWG partners with The Mobility House to offer private EV charging solutions (wallboxes) to residential customers, including a free hotline for consultation and coordination with local electrical installers.
• GIZ GmbH (Deutsche Gesellschaft für Internationale Zusammenarbeit)minorStrategic or Co-development PartnerÜWG donated a used combined heat and power unit (BHKW) to a Ukrainian regional energy company via GIZ, which coordinated on-site logistics as part of the German Federal Ministry for Economic Affairs and Energy (BMWi) reconstruction program. More than 100 companies participated, delivering 35,000 energy goods helping 1.5 million people.
• Stadtwerke Groß-Gerau Versorgungs GmbH (GGV)minorStrategic or Co-development PartnerÜWG co-operates the biogas plant in Groß-Gerau/Wallerstädten with its subsidiary Stadtwerke Groß-Gerau Versorgungs GmbH (GGV), which also operates the electricity grid in the city of Groß-Gerau under separate regulatory ownership.

Scale indicators13 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Mainzer Stadtwerke AG: ÜWG's 95% parent and broader municipal utility group; operates electricity, gas, water, public transport, and hydrogen across Mainz and the wider region. Same corporate family and overlapping product portfolio.
• EnBW AG: Major German energy group with significant Hesse and Baden-Württemberg presence across generation, distribution, EV charging, and hydrogen. Provides a benchmark for how scaled incumbents approach the same municipal and EV-charging segments ÜWG targets.
• Süwag Energie AG: Large regional utility across Hesse and parts of Baden-Württemberg offering grid services, EV charging, and renewable generation at substantially greater scale. Comparable offerings but operates as a multi-district incumbent rather than a single-district specialist.
• Stadtwerke Frankfurt am Main GmbH: Large Frankfurt municipal utility with grid operation, mobility, and renewable generation in the same Rhein-Main region. Competitor for larger municipal and EV-charging RFPs that ÜWG might otherwise bid for.

Direct peers

• EWR GmbH: Regional utility serving parts of Riedstadt-adjacent areas in Hesse/Rhineland-Palatinate with electricity, gas, water, and contracting services. Similar size profile and integrated municipal utility model.
• Mainzer Netze GmbH: Licensed grid operator for the same region where ÜWG provides network services. Operates medium/low-voltage grids and processes grid connections in adjacent Mainz-area territories, making it the closest structural peer in business model and customer base.
• ESWE Versorgungs AG: Wiesbaden municipal utility operating electricity, gas, water, and public charging infrastructure. Comparable integrated municipal-utility profile with similar Energiewende service offerings in a neighboring Hessian market.
• GGEW Bergstraße AG: Regional energy supplier along the Hessian Bergstraße corridor with grid operation, renewable generation, and municipal services. Closely comparable scale and service mix to ÜWG.
• HSE Technik GmbH & Co. KG: Darmstadt-area municipal-affiliated utility operating distribution grids and street lighting in southern Hesse. Comparable in scope (grid operation, municipal lighting, contracting) and serves overlapping Rhine-Main demand patterns.
• Ovag Energie AG: Regional Hessian municipal-affiliated utility providing grid operation, energy supply, and contracting to a multi-county service area. Comparable municipal-utility structure and Energiewende-aligned offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xxing.com/pages/uberlandwerkgross-geraugmbh
• LinkedInlinkedin.com/company/%C3%BCberlandwerk-gro%C3%9F-gerau-gmbh

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries3 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 Überlandwerk Groß-Gerau GmbH