What FairEnergie GmbH does

FairEnergie GmbH is a regional municipal utility headquartered in Reutlingen, Baden-Württemberg, Germany, operating as part of the Stadtwerke Reutlingen Group. The company was founded in 2000 under the FairEnergie brand, building on more than 150 years of municipal utility history in Reutlingen. It is owned 75.1% by Stadtwerke Reutlingen GmbH and 24.9% by EnBW Kommunale Beteiligungen GmbH, with the Group collectively employing over 800 staff across its affiliated companies. FairEnergie serves residential and commercial customers in the Reutlingen region with electricity, natural gas, district heating (FernWärme), drinking water, and e-mobility services.

The product portfolio spans an eco-electricity tariff (FairStromBiosphäre), a dynamic/time-of-use tariff (FairStromSmart), a residential and commercial solar PV rental product (FairflixtSonnig), biogas (BioGas), district heating and heat pump rentals, an H2-Grid hydrogen infrastructure project, and public e-mobility charging. The underlying technical footprint is operated through FairNetz GmbH, a 100% subsidiary founded in 2015 that owns and runs the local electricity, gas, water, and district heating grids. The corporate and technical base is TSM-certified (2021) and the company has been named Top-Lokalversorger in 2025 and 2026.

The business model is a regulated municipal utility model: revenue from tariff-based retail energy and water sales, regulated grid fees (via FairNetz), and an emerging layer of energy-as-a-service offerings (solar PV rental, heat pump rental, EV charging) that move the company beyond pure commodity supply. Pricing is segmented across standard, eco, and dynamic tariffs, with municipal concession rights providing a structural floor under the customer base within the Reutlingen service area.

Name

FairEnergie GmbH

Legal name

FairEnergie GmbH

Website

https://fairenergie.de

Company type

Private

Founded year

2000

Operating status

Operating

Headcount range

11–50 employees

Short description

FairEnergie GmbH is a Reutlingen-based municipal utility providing electricity, natural gas, district heating, drinking water, and e-mobility services to residential and commercial customers in the Baden-Württemberg region, and is part of the Stadtwerke Reutlingen Group.

Ownership category

akta.pro rank

Product category

Municipal Utilities (Electricity, Gas, District Heating, Water)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Regulated Natural Gas Utility (LDC) Customer Acquisition & Switching (EUAAADAA)

akta.pro secondary industry

Organics-to-Energy & CHP from Biogas (On-site Power/Heat) (EUAIAEAG)

Keywords

• Municipal energy supply
• Electricity and gas tariffs
• District heating services
• Drinking water supply
• Renewable energy products

Headquarters

HQ city

Reutlingen, Sulz

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Electricity Sales: Sale of electricity to residential and business customers through various tariff products including standard tariffs, eco-tariffs (FairStromBiosphäre), and dynamic pricing (FairStromSmart). Revenue from grid usage fees and energy supply contracts.
2. Natural Gas Sales: Sale of natural gas and biogas to residential and commercial customers through tariff advisor system.
3. District Heating: Supply of district heating (Fernwärme) to connected buildings in the Reutlingen service area, part of decarbonization strategy.
4. Drinking Water Supply: Provision of drinking water to households and businesses in the municipal service area.
5. Solar PV and Heat Pump Rental: Pacht (rental/lease) model for solar PV systems (FairflixtSonnig) and heat pumps, providing upfront-free installation with ongoing payments.
6. E-Mobility Charging: EV charging infrastructure including public charging stations and charging card services through ladEnergienetz.de network partnership.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels8 records

Core offering

FairEnergie GmbH is a municipal utility supplying electricity, natural gas, district heating (FernWärme), and drinking water to residential and business customers in Reutlingen and surrounding areas. The portfolio includes differentiated electricity tariffs (FairStromBiosphäre, FairStromSmart, FairStromFlex, FairStromWärme), BioGas blends, district heating, solar PV and heat pump rental (Pachtmodell), EV charging infrastructure, and energy consulting services.

Product overview

FairEnergie GmbH is a regional energy and utility company serving Reutlingen and surrounding areas as part of the Stadtwerke Reutlingen Gruppe. The company operates a multi-product portfolio organized around four core utilities: electricity (Strom), natural gas (Erdgas), heating (Wärme), and water (Wasser). The electricity offerings include differentiated tariffs such as FairStromBiosphäre (100% renewable from the Swabian Alb biosphere), FairStromSmart (dynamic pricing), FairStromFlex (flexible tariff), and FairStromWärme (for electric heating). Add-on energy products include FairflixtSonnig (solar panel leasing with optional wallbox and battery), Solarpark Buttenhausen (solar investment), and H2-Grid (hydrogen infrastructure). The gas portfolio features BioGas blends at 5% and 10% biogas content. District heating (FernWärme) is provided through a modernized combined heat and power plant, supplemented by a heat pump leasing option. Water services include drinking water supply with analysis. E-mobility services round out the portfolio through charging cards, public charging stations including a barrier-free station, and natural gas refueling points.

Differentiator

Problem solved

Functional benefit

Products and services

• FairStromBiosphäre 100% renewable electricity product sourced primarily from the Biosphere Area Swabian Alb, supporting regional sustainable energy production, climate protection, and biodiversity conservation; for environmentally conscious residential and business customers in the Reutlingen service area.
• FairStromSmart Dynamic electricity pricing product enabling customers to benefit from live electricity prices with transparent, flexible tariff exposure; for residential and business customers seeking time-of-use electricity pricing.
• FairStromFlex Flexible electricity tariff offering adaptable pricing for customers seeking variable energy options; for residential customers in the Reutlingen service area.
• FairStromWärme Electricity product designed for heating purposes, supporting customers with electric heating systems; for residential households using electricity-based heating.
• FairflixtSonnig (Solar PV Pachtmodell) Solar PV panel rental (Pachtmodell) including optional wallbox and battery storage for charging electric vehicles with self-generated solar power; for residential and business customers seeking rooftop solar without upfront purchase cost.
• Solarpark Buttenhausen Solar park investment opportunity enabling customers to support regional solar energy production in the Reutlingen region; for environmentally conscious customers seeking renewable energy participation.
• H2-Grid (Hydrogen Grid Initiative) Hydrogen grid initiative for the development of regional hydrogen energy distribution infrastructure; for future hydrogen-based energy supply in the Reutlingen region.
• BioGas Natural gas product with optional biogas content available in 5% and 10% blends for environmentally conscious gas customers; for residential and commercial customers seeking lower-carbon gas supply.
• FernWärme (District Heating) District heating network providing climate-friendly warmth via a modernized combined heat and power (BHKW) plant, with ongoing network expansion including Kaiserstraße and Marktplatz projects; for connected buildings in the Reutlingen service area.
• Wärmepumpe pachten (Heat Pump Rental) Heat pump leasing service for customers seeking sustainable heating solutions without upfront purchase costs; for residential and commercial customers transitioning away from oil and gas heating.
• Trinkwasser (Drinking Water Supply) Drinking water supply service to households and businesses in the Reutlingen municipal service area, including water analysis and water hardness information; for residential and commercial customers in the municipality.
• E-Mobilität Ladekarte (EV Charging Card) EV charging card enabling customers to charge electric vehicles at FairEnergie stations in Reutlingen and at over 20,000 charging points across Germany via the ladenetz.de network partnership; for EV drivers in the region.
• Stromtankstellen (EV Charging Stations) Public electric vehicle charging stations operated by FairEnergie in Reutlingen, including Germany's first barrier-free charging station at Reutlingen train station; for EV drivers and visitors to the city.
• Erdgastankstellen (Natural Gas Refueling Stations) Natural gas refueling stations for natural gas vehicles (CNG) in the Reutlingen region; for drivers of natural gas-powered vehicles.

Quantifiable outcome

• TSM certification achieved in February 2021 for gas, drinking water, electricity, and district heating by DVGW, FNN, and AGFW experts

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

Feature6 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Stadtwerke Reutlingen GmbH (Holding)coreOthersParent holding company of the municipal utility group. Holds 75.1% majority stake in FairEnergie GmbH. Provides central commercial services for affiliated companies including FairEnergie, FairNetz, Kraftwerk Reutlingen-Kirchentellinsfurt AG, and Reutlinger Stadtverkehrsgesellschaft mbH.
• FairNetz GmbHcoreStrategic or Co-development Partner100% subsidiary of FairEnergie GmbH, founded in 2015. Operates energy distribution networks. Shared TSM certification with FairEnergie. Part of integrated municipal utility services.
• ladEnergienetz.deminorChannel Partner/ Reseller/ DistributorCharging network partnership allowing FairEnergie customers to charge EVs at over 20,000 charging points across Germany through the ladEnergienetz.de network. FairEnergie provides its own charging card for access.
• DVGW, FNN, AGFWminorOthersEnergy industry regulatory and standards bodies. Awarded TSM (Technical Safety Management) certification to FairEnergie and FairNetz in February 2021 after expert inspections of gas, water, electricity, and district heating operations.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Mainova AG: Frankfurt-based municipal multi-utility supplying electricity, gas, heat, and water. Comparable integrated Stadtwerke-style model with district heating operations and regulated grid activities, serving a comparable mix of residential and commercial customers.
• N-ERGIE Aktiengesellschaft: Nuremberg-based municipal multi-utility offering electricity, gas, district heating, water, and e-mobility to residential and business customers. Closely comparable in product breadth and municipal ownership structure.
• MVV Energie AG: Mannheim-based municipal multi-utility and one of the few publicly listed German Stadtwerke. Comparable integrated portfolio across electricity, gas, district heating, water, and energy services, with similar focus on municipal decarbonization.
• badenova AG & Co. KG: Regional energy and water supplier based in Freiburg, Baden-Württemberg, with municipal shareholders. Comparable regional scope, renewable energy focus, and integrated utility profile in the same state.
• Stadtwerke Heidelberg GmbH: Heidelberg municipal multi-utility supplying electricity, gas, heat, and water to households and businesses. Comparable size, regional scope, and integrated Stadtwerke operating model within Baden-Württemberg.
• Stadtwerke Tübingen GmbH: Municipal multi-utility in Tübingen, Baden-Württemberg, supplying electricity, gas, heat, and water to a similar-sized regional customer base. Highly comparable to FairEnergie in scale, product mix, and regulatory setup, and located just ~30 km from Reutlingen.
• Stadtwerke Stuttgart GmbH: Larger municipal multi-utility in Stuttgart, Baden-Württemberg, offering electricity, gas, district heating, water, and e-mobility. Same state-level regulatory environment and similar integrated utility structure, though at greater scale.
• Stadtwerke München GmbH (SWM): Munich municipal multi-utility, Germany's largest Stadtwerke by revenue. Operates electricity, gas, district heating, water, and U-Bahn-adjacent services. A scaled-up version of FairEnergie's integrated model, often viewed as the benchmark for municipal utility decarbonization.
• Stadtwerke Karlsruhe GmbH: Karlsruhe municipal multi-utility offering electricity, gas, heat, water, and transport services. Similar integrated structure and Baden-Württemberg regulatory environment, with comparable focus on local energy transition.

Broad incumbents

• EnBW Energie Baden-Württemberg AG: Largest energy supplier in Baden-Württemberg and 24.9% minority shareholder of FairEnergie. Overlaps on electricity, gas, district heating, and grid services at much greater scale across the same geography.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

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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