Stadtwerke Duisburg

What Stadtwerke Duisburg does

Stadtwerke Duisburg AG is a Duisburg-based municipal multi-utility (Stadtwerke) founded in 1854 and wholly owned through Duisburger Versorgungs- und Verkehrsgesellschaft mbH (DVV). The company supplies electricity, natural gas, drinking water, and district heating to residential, commercial, industrial, and housing-industry customers across its Duisburg concession; water supply dates to 1875, and national reach is achieved via online brands R(H)EINPOWER and ZEBRASTROM. Operating subsidiaries under the DVV umbrella handle specialized functions: Fernwärme Duisburg GmbH (district heating), DCC Duisburg CityCom GmbH (fiber, telephony, TV), ThermoPlus WärmeDirekt Service GmbH (heat contracting), and Stadtwerke Duisburg Energiehandel GmbH (wholesale energy trading, described as one of Germany's leading municipal energy traders).

The technology stack spans a Smart Meter rollout coordinated with grid operator Netze Duisburg, a customer-facing Home Energy Management System (HEMS) that integrates PV output, EV charging state, real-time EPEX Spot prices, and smart home devices, and a growing public EV charging network (~374 points at year-end 2025). Generation-side, the company is investing in PV feed-in (37.74 GWh delivered to the Duisburg grid in 2025, +22% YoY), a 6.4 MW wind acquisition (2026), large-scale battery storage (planned 24 MWh combined at Bungertstraße and harbor area), Germany's largest innovative CHP at the Huckingen wastewater treatment plant, the Energiezentrale Wedau data-center-waste-heat-to-heating plant, and state-funded deep geothermal exploration, all aligned to a stated goal of fully CO2-neutral own energy production by 2035.

Revenue is generated through regulated and semi-regulated utility tariffs — fixed base charges plus volumetric consumption charges for electricity, gas, and water — supplemented by subscription-based district heating fees, usage-based EV charging fees, transaction-based wholesale energy trading through Energiehandel, hardware and installation sales via the StadtwerkE-Shop and epilot-powered commerce flow, and consulting/audit services for business customers. GTM is hybrid: direct/inside-sales through the website, service hotline, and MEIN SWDU self-service portal for residential, dedicated account managers for enterprise, and national digital acquisition via R(H)EINPOWER and ZEBRASTROM. Customer acquisition is amplified by community engagement (Stadtwerke-Sommerkino, Zoo Duisburg sponsorship, environmental campaigns), a referral program (Freunde werben Freunde, €40 per referral), and the 25-year-old Stadtwerke-Kundenkarte loyalty network of 2,500+ discount partners.

Name

Stadtwerke Duisburg

Legal name

Stadtwerke Duisburg AG

Website

https://stadtwerke-duisburg.de

Company type

Private

Founded year

1854

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Stadtwerke Duisburg AG is a Duisburg-based municipal multi-utility (founded 1854, owned via DVV) supplying electricity, gas, water, and district heating to residential, commercial, industrial, and housing-industry customers in Duisburg, with national reach via the R(H)EINPOWER and ZEBRASTROM online brands.

Ownership category

akta.pro rank

Product category

Municipal Utility Services

NAICS

Electric Power Generation, Transmission and Distribution (2211), Water Supply and Irrigation Systems (221310), Steam and Air-Conditioning Supply (221330), Solar Electric Power Generation (221114)

SIC

Electric & Other Services Combined (4931), Water Supply (4941), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Multi-Utility Distribution Companies (Electric + Gas/Water Distribution) (EUADABAJ)

akta.pro secondary industries

DER Dispatch, Aggregation & Virtual Power Plant (VPP) Integration (EUADALAI), Retail Supply + DER/Virtual Power Plant Bundles (Solar, Storage, DR) (EUAGABAI), EV Charging & Fleet VPP Aggregation (Managed Charging, V2G, Depot/Highway) (EUAFAHAC), Telemetry, Metering & Measurement & Verification (M&V) for Flexibility (EUAFAHAJ)

Keywords

• Municipal utility services
• Electricity and gas supply
• Water and district heating
• E-mobility charging infrastructure
• Decentralized energy solutions

Headquarters

HQ city

Duisburg

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Electricity Supply (Strom): Supply of electricity to residential, commercial, and industrial customers in Duisburg and nationally via the R(H)EINPOWER online brand. Revenue is generated through consumption-based electricity tariffs including fixed base charges and variable consumption charges.
2. Gas Supply (Erdgas): Natural gas supply to residential, commercial, and industrial customers, both in Duisburg and nationally via online brands. Revenue model combines fixed base fees with volumetric consumption charges.
3. Water Supply (Wasser): Drinking water supply to residential and commercial customers in Duisburg, with a history dating back to 1875. Revenue is based on volumetric water consumption charges.
4. District Heating (Fernwärme): Supply of climate-friendly district heating to homes and businesses in Duisburg, including expansion of the heating network. Provided via subsidiary Fernwärme Duisburg GmbH.
5. E-Mobility / Charging Infrastructure: Operation of a growing public EV charging network across Duisburg, with charging points available for all EV owners. Revenue generated through charging fees per kWh.
6. Energy Trading (Energiehandel): Stadtwerke Duisburg Energiehandel GmbH is described as one of Germany's leading municipal energy traders, trading electricity and energy commodities in wholesale markets.
7. Energy Services and Installation: Installation and project services for PV systems, battery storage, heat pumps, wallboxes, and smart meter systems. Revenue from professional installation services, equipment sales, and ongoing maintenance.

Pricing tiers

Go-to-market motion1 record

Distribution channels6 records

Marketing channels8 records

Core offering

Stadtwerke Duisburg AG is a vertically integrated municipal utility that supplies electricity, natural gas, water, and district heating (Fernwärme) to residential, commercial, and industrial customers in Duisburg. Beyond core energy and water supply, the company sells and operates decentralized energy solutions (photovoltaics, heat pumps, wallboxes, battery storage, HEMS), provides public and customer e-mobility charging infrastructure, and delivers heat contracting services such as ThermoPlus. It also operates nationwide electricity and gas brands (R(H)EINPOWER, ZEBRASTROM) and white-label services for partner municipal utilities.

Product overview

Stadtwerke Duisburg AG operates as a multi-utility energy provider offering a comprehensive portfolio of energy and utility services. The core offerings include electricity supply, natural gas, district heating, and water supply services. The product portfolio spans energy generation and distribution infrastructure (including Energy Park Wanheim, heat storage, and large-scale battery storage), renewable energy solutions (PV systems, balcony power plants, solar carports, wind energy, geothermal exploration), and energy efficiency services (heat pumps, HEMS smart home management, smart meters, dynamic tariffs). Electromobility offerings include public charging infrastructure, home wallboxes, and charging cards. The company serves customers through sub-brands R(H)EINPOWER (national electricity/gas) and ZEBRASTROM (MSV Duisburg fan brand), supported by digital platforms including the MEIN SWDU customer portal, StadtwerkE-Shop, and MEIN DUISBURG city app. Business customers access enterprise solutions including energy consulting, battery storage systems, energy marketing, and heating contracting through subsidiaries.

Differentiator

Problem solved

Functional benefit

Brands

• Mein Duisburg-App: Free city app for people living, working, or visiting Duisburg with shopping, dining, and civic services.
• Stadtwerke-Kundenkarte
• StadtwerkE-Shop
• Stadtwerke-Wasserwelt
• IQ Pur Natur

Products and services

• Stromversorgung (Electricity Supply) Core electricity supply contracts (Grundversorgung, multi-person households, loft conversions, IQ Pur Natur green tariff, IQ Strom Dynamic dynamic EPEX-linked tariff) sold to residential and commercial customers in Duisburg.
• Erdgasversorgung (Natural Gas Supply) Natural gas supply contracts (incl. multi-person / loft-conversion variants) for residential and commercial customers in Duisburg, and Erdgas contract offerings via the R(H)EINPOWER brand for customers outside the network area.
• Fernwärmeversorgung (District Heating Supply) Heating energy supplied through the Duisburg district heating network based on in-house cogeneration (CHP) and heat distribution to residential and commercial customers.
• Wasserversorgung (Drinking Water Supply) Drinking water supply to Duisburg households and businesses via the local water network, including accompanying consultation and supply services from the city.
• Photovoltaik-Anlagen (Photovoltaic Systems) Planning, sale and integration of photovoltaic systems for residential and commercial customers to generate on-site renewable electricity.
• Wärmepumpen (Heat Pumps) Sale, integration and operation of heat-pump systems as a renewable heating alternative for residential and commercial customers; integrated with HEMS.
• Wallboxen (EV Charging Boxes) Sale and installation of wallbox charging stations for residential households (e.g., in conjunction with a customer tariff) and B2B customers (e.g., Zebracoach), integrated with HEMS and the public charging tariff.
• Batterie-Speicher (Battery Storage Systems) Stationary battery storage systems sold in combination with PV, heat pumps and wallboxes (and as large-scale BESS for grid services), controlled via the Home Energy Management System (HEMS).
• HEMS (Home Energy Management System) Digital home energy management platform that connects and orchestrates controllable in-home devices (PV, battery storage, heat pumps, wallboxes) to optimize self-consumption and grid-friendly operation.
• Wärme-Contracting ThermoPlus (Heat Contracting) Outsourced heat delivery and contracting solution (ThermoPlus) for industrial B2B customers, providing heat-as-a-service without the customer owning the heating infrastructure.
• Energieberatungen und Energie-Audits (Energy Consulting and Audits) Professional energy consulting and energy audits to advise private and B2B customers on efficiency, decarbonization, and integration of decentralized energy solutions.
• Ladepunkte (EV Charging Points) Public and customer-located EV charging points (Stadteil-Ladepunkte, partner locations such as Zebracoach and Nio House), connected via the Zebra Connect telemetry/IoT platform and accessible through the e-mobility tariffs.
• R(H)EINPOWER Strom- und Erdgas-Tarife (R(H)EINPOWER Electricity and Gas Brand) National Strom and Erdgas supply contracts marketed under the R(H)EINPOWER brand for customers outside the Duisburg network area, with Wechsel- and partner-coupon benefits.
• ZEBRASTROM (Green Electricity Brand) Green electricity tariff marketed under the ZEBRASTROM brand for households across Germany, with switching bonuses (Wechselboni) and brand-loyal partner benefits.
• Stadtwerke-Duisburg-Kundenkarte (Customer Card / Loyalty Program) Loyalty program with a customer card that grants discounts and benefits at partner restaurants, retailers and cultural venues across Duisburg for energy customers.
• Stadtwerke-Komplett (White-Label Sales/Marketing/CRM Process Package for Municipal Utilities) White-label partner program that packages the company's internal sales, marketing, CRM and customer-service processes for other municipal utilities (Stadtwerke/Versorger), bundled with the marketing toolbox and digital services.

Quantifiable outcome

• 370+ public charging points deployed across Duisburg by 2025
• +3 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability3 records

Feature3 records

Partnerships

Ten partnerships are on record, tiered minor and core.

• Stadtwerke MünsterminorOthers · 30 June 2026Stadtwerke Duisburg acquired two wind turbines with a combined capacity of 6.4 MW from Stadtwerke Münster in June 2026. The turbines are located south of Münster city and have been successfully operational since September 2017.
• VIVAWESTcoreStrategic or Co-development Partner · 1 June 2026VIVAWEST (a housing company) is partnering with Stadtwerke Duisburg and Fernwärme Duisburg GmbH to connect nearly 1,700 apartments in approximately 370 buildings in the Obermarxloher Dichterviertel to the climate-friendly Duisburg district heating network. This large-scale project serves nearly 5,000 people and represents a significant expansion of the district heating network.
• RWEminorOthers · 19 January 2026RWE is mentioned as one of the major energy firms that has secured offtake deals with Terralayr, the BESS flexibility platform and operator with which Stadtwerke Duisburg cooperates on battery storage marketing.
• VattenfallminorOthers · 19 January 2026Vattenfall is mentioned as one of the major energy firms that has secured offtake deals with Terralayr, the BESS flexibility platform and operator with which Stadtwerke Duisburg cooperates on battery storage marketing.
• TerralayrcoreStrategic or Co-development Partner · 29 September 2025Stadtwerke Duisburg Energiehandel GmbH (described as one of Germany's leading municipal energy traders) and Terralayr (a flexibility provider and BESS operator) entered into a cooperation to jointly develop and market battery energy storage systems (BESS) with local municipal utilities across Germany. The partnership enables shared development and marketing of BESS assets, leveraging Stadtwerke Duisburg's energy trading expertise and Terralayr's flexibility platform technology.
• Zoo Duisburg / Yaqu Pacha e.V.minorOthers · 23 September 2025Stadtwerke Duisburg is the main sponsor of the Stadtwerke-Wasserwelt aquarium and Rio Negro tropical hall in Zoo Duisburg, opened in November 2023. The company has taken over sponsorship of the manatee Pablo. The zoo supports Yaqu Pacha e.V. for the protection of manatees and other aquatic species in South America.
• Fernwärme Duisburg GmbHcoreStrategic or Co-development PartnerA subsidiary of the DVV group that operates the Duisburg district heating network. Stadtwerke Duisburg works closely with Fernwärme Duisburg on district heating expansion projects, including the Dichterviertel connection project with VIVAWEST and the Energiezentrale Wedau project utilizing data center waste heat.
• ThermoPlus WärmeDirekt Service GmbHminorStrategic or Co-development PartnerA subsidiary of DVV providing heat contracting services. Stadtwerke Duisburg refers customers for heat contracting solutions through ThermoPlus and maintains joint customer data processing arrangements under Art. 26 GDPR.
• DCC Duisburg CityCom GmbHminorChannel Partner/ Reseller/ DistributorSister company and telecommunications provider offering fiber optic internet, telephony, and TV services. Stadtwerke Duisburg rewards DCC customers who also hold electricity or gas contracts with a €50 annual bonus, creating cross-selling synergies between the two companies.
• Netze Duisburg GmbHcoreOthersThe local electricity grid operator responsible for the Smart Meter rollout in Duisburg, responsible for installing intelligent measurement systems (Smart Meter Gateway) in households. Stadtwerke Duisburg works with Netze Duisburg for smart meter data integration and coordinated rollout of EV charging infrastructure across the city's distribution network.

Scale indicators11 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Mainova AG: Mainova is the Frankfurt municipal multi-utility, providing electricity, gas, water, and district heating. Directly comparable multi-utility model with regulated local franchise, energy transition investments, and similar GTM (direct sales + online brands for national reach).
• Stadtwerke München (SWM): Stadtwerke München is Germany's largest municipal multi-utility, supplying electricity, gas, district heating, water, and operates Munich's U-Bahn. Comparable to Stadtwerke Duisburg in core municipal multi-utility model, regulated distribution franchise, energy transition capex, and offering broadband/telecom services.
• EWE AG: EWE is a regional German multi-utility serving Lower Saxony, Bremen, Brandenburg, and parts of NRW with electricity, gas, water, and heat. Directly comparable as a regional multi-utility with similar customer segments, BESS and renewable investments, and digital customer-portal strategy.
• Stadtwerke Münster: Stadtwerke Münster is the multi-utility of Münster, supplying electricity, gas, water, heat, and operating public transport. Directly comparable as a municipal multi-utility; even more proximate because SWDU acquired 6.4 MW of wind capacity from Stadtwerke Münster in June 2026, evidencing operational comparability.
• RheinEnergie: RheinEnergie is the multi-utility of Cologne, supplying electricity, gas, water, and district heating in the Rhineland region. Directly comparable to Stadtwerke Duisburg as a regional German municipal multi-utility with adjacent NRW footprint, similar customer mix (residential, commercial, industrial, housing), and parallel decarbonization programs.
• Stadtwerke Bonn: Stadtwerke Bonn is the municipal utility of Bonn, providing electricity, gas, water, and heat to the federal city and surrounding region. Closely comparable as a mid-sized NRW municipal multi-utility with renewable generation, EV charging build-out, and BESS ambitions.
• Stadtwerke Köln: Stadtwerke Köln operates the Hallenbad and Bäder framework, supplying energy and water services for Cologne, plus national online brands. Comparable multi-utility scope, NRW focus, and parallel product structure including dynamic tariffs, PV, EV charging, and district heating.

Emerging players

• Terralayr: Terralayr is a Berlin-based flexibility and BESS-as-a-service operator with a DER aggregation platform that has secured offtake with RWE, Vattenfall, and others. Directly comparable because SWDU's Energiehandel subsidiary has a partnership with Terralayr to jointly develop and market BESS to municipal utilities across Germany.

Regional players

• N-ERGIE AG: N-ERGIE is the municipal multi-utility of Nuremberg, supplying electricity, gas, water, and district heating across Middle Franconia. Comparable multi-utility operating model with regulated franchise, energy transition investments, and EV charging build-out, though its core geography is Bavaria rather than NRW.

Broad incumbents

• Westenergie (E.ON): Westenergie is the regional distribution arm of E.ON, operating regulated electricity and gas distribution networks in NRW including parts of the Ruhr area. Comparable as a regulated distribution and energy services player with EV charging, smart meter rollout, and decarbonization offerings for municipal and housing customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@stadtwerkeduisburg
• Facebookfacebook.com/StadtwerkeDuisburg
• Instagraminstagram.com/stadtwerkeduisburg

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries4 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 Stadtwerke Duisburg