FairEnergie GmbH

What FairEnergie GmbH does

FairEnergie GmbH is a regional municipal energy utility headquartered in Reutlingen, Germany, supplying electricity, natural gas, district heating (Fernwärme), and drinking water to residential, commercial, and public-sector customers across the Reutlingen region and surrounding area. The company operates as the primary supply entity within the Stadtwerke Reutlingen Gruppe, which is 75.1%-owned by Stadtwerke Reutlingen GmbH and 24.9%-owned by EnBW Kommunale Beteiligungen GmbH. Its operational heritage dates to the 1870s, though the FairEnergie brand was established in 2000. Grid and network operations are managed through its wholly-owned subsidiary FairNetz GmbH, established in 2015.

The company's core product portfolio spans four electricity tariffs (FairStromBiosphäre for 100% regional renewable electricity from the Schwäbische Alb biosphere, FairStromFlex and FairStromSmart for dynamic pricing, and FairStromWärme for heating applications), BioGas products with 5% and 10% renewable blends, district heating solutions including Nahwärme neighborhood projects, heat pump and solar PV leasing (FairflixtSonnig), and electric mobility infrastructure including a charging card with access to 20,000+ charging points via the ladenetz.de network. Technical infrastructure includes a combined heat and power plant (Blockheizkraftwerk) at Hauffstraße and an H2-Grid hydrogen initiative for future energy transition. The company holds TSM certification for gas, water, electricity, and district heating, and has received Top-Lokalversorger recognition consecutively in 2025 and 2026.

The business model is anchored in recurring subscription-based utility supply contracts with monthly billing, complemented by usage-based EV charging revenue and project-based municipal district heating installations. Customer acquisition operates through a hybrid digital-and-direct-sales motion: online tariff comparison and self-service portals for residential customers, alongside dedicated business customer consultation and in-person service center appointments. Distribution is exclusively domestic (Germany), with the entire customer base concentrated in the Reutlingen concession area. Revenue is not publicly disclosed.

Name

FairEnergie GmbH

Legal name

FairEnergie GmbH

Website

https://fairenergie.de

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

1–10 employees

Short description

FairEnergie GmbH is a regional municipal energy utility in Reutlingen, Germany, supplying electricity, gas, district heating, and water to residential, commercial, and municipal customers across the Reutlingen region, with adjacent offerings in solar leasing, EV charging, and hydrogen infrastructure.

Ownership category

akta.pro rank

Product category

Multi-Utility Services

NAICS

Electric Power Generation, Transmission and Distribution (2211)

SIC

Natural Gas Transmisison & Distribution (4923), Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Renewable Distributed Generation (Rooftop/Onsite Solar, Small Wind, Small Hydro) (EUACALAJ)

akta.pro secondary industries

Distributed Generation (DG) Solar & Small Wind (EUAMAJAD), Distributed Storage (Behind-the-Meter Batteries) (EUAMAJAE), Demand Response & Load Flexibility Services (EUAMAJAF), Regulated Natural Gas Utility (LDC) Customer Acquisition & Switching (EUAAADAA)

Keywords

• Municipal energy supply
• Electricity distribution
• Natural gas supply
• District heating
• Drinking water supply

Headquarters

HQ city

Reutlingen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Electricity Supply: Supply of electricity including standard tariffs, eco-power (FairStromBiosphäre), dynamic pricing (FairStromSmart), and heating-focused tariffs (FairStromWärme)
2. Natural Gas Supply: Natural gas supply including BioGas blends (5% and 10% renewable content) for residential and business customers
3. District Heating (Fernwärme): District heating supply through urban network infrastructure
4. Water Supply: Drinking water supply and analysis services for the Reutlingen region
5. E-Mobility Services: Public EV charging infrastructure and charging cards for access to over 20,000 charging points via ladenetz.de network
6. Solar PV Leasing (FairflixtSonnig): Solar PV system leasing (Pacht model) including installation and maintenance
7. Heat Pump Leasing (Wärmepumpe): Heat pump leasing arrangements for sustainable heating solutions

Pricing tiers

Go-to-market motion2 records

Distribution channels6 records

Marketing channels7 records

Core offering

FairEnergie GmbH is a regional multi-utility based in Reutlingen, Germany, supplying electricity (including renewable and dynamic tariffs), natural gas, biogas, drinking water, district heating, local neighborhood heating, and e-mobility charging services. The company also offers rental and participation models for solar PV systems, heat pumps, and a community solar park, serving residential, commercial, and municipal customers across the Neckar-Alb region.

Product overview

FairEnergie GmbH operates as a regional energy utility serving Reutlingen and surrounding areas with an integrated portfolio of electricity, natural gas, heating, water, and mobility services. The core offering centers on electricity products (FairStrom line: Biosphäre, Flex, Smart, Wärme) supplemented by biogas offerings, district and local heating solutions (FernWärme, Nahwärme, heat pump rental), drinking water supply, and electric/gas mobility infrastructure. Key differentiated products include FairStromBiosphäre (regional eco-electricity from the biosphere area), FairflixtSonnig (solar panel rental with optional wallbox and storage for EV charging), and the expanding district heating network. The portfolio reflects a transition strategy toward renewable energies, hydrogen (H2-Grid), and sustainable mobility.

Differentiator

Problem solved

Functional benefit

Brands

• FairStrom*Biosphäre: 100% renewable electricity product generated primarily in the Biosphärengebiet Schwäbische Alb (Swabian Alb biosphere reserve) region.
• FairStromFlex
• FairStromWärme
• FairStromSmart
• BioGas
• FairflixtSonnig

Products and services

• FairStromBiosphäre
• FairStromFlex
• FairStromSmart
• FairStromWärme
• FairGas
• FairGasBiogas
• FairflixtSonnig
• Solarpark Buttenhausen
• Fernwärme
• Nahwärme & Quartiere
• Wärmepumpe pachten
• Trinkwasser
• FairStrom e-mobil Ladekarte

Named customers3 records

Segments3 records

Ideal customer profiles3 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 and supporting.

• FairNetz GmbHcoreStrategic or Co-development Partner · 1 January 2015100% subsidiary of FairEnergie established in 2015, responsible for network infrastructure operations including electricity, gas, water, and district heating networks. Both FairEnergie and FairNetz received TSM certification together.
• Stadtwerke Reutlingen GmbHcoreStrategic or Co-development PartnerParent holding company that provides centralized commercial services to FairEnergie and other group companies. Holds 75.1% majority stake in FairEnergie.
• Kraftwerk Reutlingen-Kirchentellinsfurt AGsupportingStrategic or Co-development PartnerPower plant company within the Stadtwerke Reutlingen group that generates electricity and heat for the regional supply
• Reutlinger Stadtverkehrsgesellschaft mbHsupportingStrategic or Co-development PartnerPublic transport company within the Stadtwerke Reutlingen group, related municipal mobility services
• ladenetz.desupportingTechnology or IntegrationEV charging network partnership providing access to over 20,000 charging points across Germany through the FairEnergie charging card

Scale indicators4 records

Recent moves7 records

Expansion highlights6 records

Emerging players

• Lichtblick SE: Hamburg-based green energy supplier offering dynamic tariffs, green electricity, and decentralized energy products. Comparable positioning in renewable electricity products and customer-facing digital tools.

Direct peers

• N-ERGIE Aktiengesellschaft: Nuremberg municipal utility providing electricity, gas, heat, and water across Middle Franconia. Comparable Stadtwerke structure, multi-utility product set, and renewable/CHP generation assets.
• Lechwerke AG: Augsburg-based regional energy utility (subsidiary of E.ON) supplying electricity, gas, heat, and grid services across Bavarian Swabia. Comparable municipal-utility-roots profile and distributed generation footprint.
• Mainova AG: Frankfurt-based municipal multi-utility supplying electricity, gas, heat, and water to the Rhine-Main region. Comparable integrated portfolio, regional Stadtwerke governance model, and customer mix (residential, commercial, municipal).
• SWK Stadtwerke Krefeld AG: Krefeld municipal utility offering electricity, gas, heat, water, and mobility services. Comparable mid-size German Stadtwerke with diversified product portfolio and EV charging buildout.
• Pfalzwerke AG: Ludwigshafen-based regional utility serving the Palatinate region with electricity, gas, heat, water, and grid services. Comparable municipal multi-utility model with renewable generation and EV charging offerings.
• badenova AG & Co. KG: Regional municipal multi-utility headquartered in Freiburg, Baden-Württemberg. Supplies electricity, gas, heat, and water across southwestern Germany with strong renewable energy and district heating focus — highly comparable scope and regional setting to FairEnergie.
• Technische Werke Friedrichshafen GmbH: Lake Constance region multi-utility (electricity, gas, heat, water, telecom) owned by the city of Friedrichshafen. Closest direct geographic and scale peer to FairEnergie within Baden-Württemberg.

Broad incumbents

• E.ON SE: Major German/European energy company with extensive distribution network and retail operations. Competes with FairEnergie in residential/business electricity and gas supply across deregulated segments.
• EnBW Energie Baden-Württemberg AG: Largest energy company in Baden-Württemberg and 24.9% minority shareholder of FairEnergie. Operates generation, T&D, and retail across the same region, providing both competitive overlap and partnership leverage.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/profile.php
• LinkedInlinkedin.com/company/fairenergie-gmbh
• Instagraminstagram.com/stadtwerke_reutlingen/?fbclid=IwZXh0bgNhZW0CMTEAAR1tvH3J_QqKYPSPhERQtMZAGnsolmwvVyXk2e5bEZiwoJSxs75OZhAI2EQ_aem_JQkE1A4Dd8W7uPweTnK9HA

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

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 FairEnergie GmbH