REBI

What REBI does

REBI (Recursos de la Biomasa, S.L.U.) is a Spanish renewable thermal energy company specializing in the design, construction, and operation of biomass-powered district heating networks (redes de calor). Founded in 2012 and headquartered in San Sebastián de los Reyes (Madrid) under parent Grupo Amatex Bie S.L., the company operates eight networks across Soria, Ólvega, Aranda de Duero, Guadalajara, Cuenca, Móstoles, Valladolid, and Palencia, serving an aggregate of more than 53,000 dwellings plus public institutions and industrial facilities. REBI reports that its networks avoid over 37,200 tons of CO2 annually and run on automated biomass boilers with fixed and moving grates, condensers/economizers for flue gas heat recovery, solar thermal and heat pump hybridization, and a proprietary fiber optic monitoring system integrated with SCADA for real-time leak detection and alarm generation.

The company's core product is district heating infrastructure sold through long-term concessions and energy supply contracts to residential communities, municipalities, and public institutions, priced at approximately 6.7 cents per kWh—delivering 20-22% savings versus gasoil for end customers. A second product line, Industrial Decarbonization, provides dedicated biomass boiler installations and heat-recovery solutions to manufacturers including Michelin (12 MW at Aranda de Duero), INCARLOPSA (6 MW, Tarancón), REINSO (16 MW), and FICO, plus the Universidad de Valladolid campus (28 MW). Revenue is generated primarily through subscription/recurring thermal energy supply contracts and managed-services concessions, supplemented by distribution of POLIURS pre-insulated pipes, energy consulting, and thermal exchange substations.

REBI's go-to-market is enterprise field sales targeting municipalities, industrial buyers, and residential associations, with EU programs (IDAE, FEDER, NextGenerationEU) and regional subsidies (Junta de Castilla y León, MITECO) often catalyzing deal flow. In 2026, RIVE Private Investment made a growth equity investment in REBI, marking its first disclosed external institutional partner. The company has received multiple awards including iClima 2026 Best Applied Circularity Project (with Michelin), MITECO recognition, Premio Pyme del Año de Soria 2023, and UN Global Compact SDG Ambition participation.

Name

REBI

Legal name

Recursos De La Biomasa, S.L.U.

Website

https://rebi.es

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

51–100 employees

Short description

REBI (Recursos de la Biomasa, S.L.U.) designs, builds, and operates biomass-powered district heating networks across eight Spanish cities, supplying renewable thermal energy to more than 53,000 dwellings, municipalities, and industrial clients including Michelin.

Ownership category

akta.pro rank

Product category

District Heating Services

NAICS

Steam and Air-Conditioning Supply (221330), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414)

SIC

Cogeneration Services & Small Power Producers (4991), Heating Equipment, Except Electric & Warm Air Furnaces (3433)

akta.pro primary industry

District Energy Biomass Plants (Heating Networks) (EUAAAGAB)

akta.pro secondary industries

Biomass CHP & Cogeneration Plants (Industrial & Utility) (EUAAAGAA), Biomass Combustion & Boiler Island Technology (Grates, Fluidized Bed, Burners) (EUAAAGAG), Heat Recovery & Thermal Integration for Biomass Plants (Economizers, ORC, Heat Exchangers) (EUAAAGAL), Industrial Heat Pumps & Mechanical Vapor Recompression (Low–Mid Temp Heat) (EUABAJAB)

Keywords

• District heating networks
• Biomass energy systems
• Industrial decarbonization
• Renewable thermal energy
• Heat recovery solutions

Headquarters

HQ city

San Sebastián de los Reyes

HQ country

Spain

HQ region

Europe

Offices7 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Thermal Energy Supply: Long-term contracts supplying heating and domestic hot water (ACS) to connected households, businesses, and public buildings. Revenue based on energy consumption (kWh thermal) at competitive, stable rates vs fossil fuels. Typically 20-22% savings vs gasoil for end customers.
2. Industrial Decarbonization Services: Customized biomass boiler and heat recovery installations for industrial facilities. Provides renewable steam, hot water, and process heat to replace fossil fuel boilers.
3. District Heating Infrastructure: Design, construction, and operation of district heating networks under concession agreements with municipalities. Revenue generated through energy supply and service contracts.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

REBI designs, builds, manages, and operates district heating networks (redes de calor) powered primarily by biomass and other renewable energy sources in Spain. The company supplies thermal energy to residential communities, municipalities, industrial facilities, and public institutions through long-term infrastructure contracts, and complements this with industrial decarbonization consulting and engineering solutions for replacing fossil-fuel-based heat generation.

Product overview

REBI operates district heating networks (redes de calor) based on biomass and renewable energy sources. The company offers two main product categories: (1) District Heating Networks serving residential buildings, public institutions, and businesses across 8 locations in Spain (Soria, Ólvega, Aranda de Duero, Guadalajara, Cuenca, Móstoles, Valladolid, and Palencia), providing heating and hot water through underground pipeline infrastructure; and (2) Industrial Decarbonization Solutions including ENERGY WORKS (industrial symbiosis with heat recovery), INCARLOPSA, REINSO, and FICO projects. Supporting services include pre-insulated pipes (as POLIURS distributor), energy consulting, and thermal exchange substations. The company integrates multiple technologies including biomass boilers (fixed and moving grates), heat pumps, solar thermal, heat recovery systems, and smart grid controls (SCADA) with fiber optic monitoring.

Differentiator

Problem solved

Functional benefit

Products and services

• District Heating Networks (Redes de Calor) End-to-end district heating service that generates thermal energy from biomass and renewable sources and distributes it via underground pipe networks to connected buildings, residential communities, public facilities, and industrial customers under long-term supply agreements.
• Industrial Decarbonization Solutions Engineering and consulting service that audits industrial thermal energy use and replaces gasoil, natural gas, or coal-fired boilers with renewable biomass, heat-recovery, and hybrid renewable systems for industrial customers.
• Pre-insulated Pipe Distribution (POLIURS) Supply of pre-insulated piping systems (POLIURS) used as the physical distribution backbone of district heating networks, providing thermal insulation for the hot water transport lines between generation plants and end customers.
• Thermal Exchange Substations (Subestaciones de Intercambio) Customer-side thermal substations that transfer heat from the district heating distribution network to individual buildings' heating and domestic hot water systems, installed and maintained by REBI as part of the district heating service.
• Energy Consulting Services Specialized consulting offering covering feasibility analysis, biomass supply sourcing, regulatory permitting, energy audits, and engineering design for renewable thermal energy projects for municipalities and industrial customers.

Quantifiable outcome

• 37,200+ tons CO2 avoided annually across all networks
• +4 more outcomes

Named customers10 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

Feature4 records

Partnerships

Eight partnerships are on record, tiered core, flagship and minor.

• A3EcoreStrategic or Co-development Partner · 8 October 2025Association for energy efficiency and sustainability. REBI joined A3E to collaborate on advancing energy efficiency and sustainability initiatives in Spain.
• Michelin España PortugalflagshipStrategic or Co-development Partner · 2 July 2025Joint development of circular economy energy model in Aranda de Duero. Michelin provides industrial waste heat from manufacturing process while REBI distributes it through district heating network to residential and commercial customers. Includes 3MW photovoltaic installation for powering heat recovery pumps.
• IberdrolaminorStrategic or Co-development PartnerCollaborative development of district heating network in Palencia supplying homes, businesses and public buildings with renewable thermal energy.
• IDAEcoreGTM or Marketing PartnerInstituto para la Diversificación y Ahorro de la Energía manages EU co-funded projects. FEDER funding for district heating infrastructure. Multiple subsidy programs supporting REBI projects.
• Universidad de ValladolidcoreStrategic or Co-development Partner14 MW district heating project supplying 24 university buildings plus municipal buildings. Joint project with UTE partner Cofely. 12 km network, the longest in Spain at the time.
• Junta de Castilla y León / ERENcoreGTM or Marketing PartnerRegional government energy agency collaborating on renewable energy projects including PERTECAL 2015-2030 planning. Somacyl manages fuel supply and billing for some projects.
• Club Balonmano SoriaminorGTM or Marketing PartnerSports sponsorship agreement supporting local team competing in División de Honor Plata. Increased economic support following team's historic promotion.
• Club Deportivo GuadalajaraminorGTM or Marketing PartnerThree-year sponsorship agreement with football club to build community relationships and brand awareness in Guadalajara region.

Scale indicators5 records

Recent moves7 records

Expansion highlights6 records

Broad incumbents

• Naturgy: Naturgy is a major Spanish gas and electricity utility expanding into renewable gases, biomethane, and energy services; it represents both a potential partner and competitive threat to REBI's residential and industrial heat supply business.
• Acciona Energía: Acciona Energía is a major Spanish renewable energy developer and operator with biomass and district heating projects; it competes for municipal clean heat concessions and EU funding.
• Iberdrola: Iberdrola is Spain's largest utility and is REBI's partner on the Palencia district heating project. As a major renewable developer expanding into heating networks, it is both an ally and a potential competitor for municipal concessions.
• ENGIE: ENGIE is a global energy and utility major with biomass, district heating, and industrial energy services businesses; its Dalkia arm is a direct Spanish competitor, while ENGIE's broader portfolio spans power generation, gas, and renewables.

Direct peers

• Fortum: Fortum is a Nordic utility with significant district heating, biomass CHP, and industrial decarbonization operations. Comparable business mix of biomass-based heat generation serving residential and industrial customers under long-term contracts.
• Ørsted: Ørsted is a global renewable energy leader that has scaled district heating from biomass and waste heat, particularly in Denmark. Comparable in operating large-scale biomass-based heat networks and pursuing industrial decarbonization.
• EnBW: EnBW is a German integrated energy company with biomass district heating and renewable heating networks across southern Germany. Operates a comparable biomass-to-heat-network model for municipalities and industrial customers.
• Statkraft: Statkraft is a major European renewable generator and district heating operator in the Nordics, with growing bioenergy and district heating assets. It is directly comparable in operating biomass/renewable district heating at scale.
• Dalkia (ENGIE Solutions): Dalkia is ENGIE's district heating and cooling subsidiary and one of the largest operators in Europe; it was REBI's UTE partner on the Valladolid University heat network, making it a directly comparable and active competitor in Spanish district heating.
• Veolia Environnement: Veolia operates district heating and cooling networks globally and has an established presence in Iberia through municipal energy concessions. It directly competes for district heating tenders and industrial decarbonization mandates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/rebisl

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries8 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 REBI