Endef

What Endef does

Endef (legal entity: ENDEF ENGINEERING S.L.) is a Spanish solar energy installer and technology developer headquartered in Zaragoza, Spain, founded in 2012. The company delivers turnkey photovoltaic self-consumption installations across four segments: residential single-family homes, commercial and industrial enterprises (manufacturing, retail, healthcare), municipal governments (city halls, public buildings, fire stations, sports centers), and neighborhood communities pursuing collective self-consumption. With more than 650 cumulative installations and 12 years of operating history, Endef concentrates primarily in Aragon (Zaragoza, Huesca, Teruel) and has extended execution to Madrid, Catalonia, the Balearic Islands and Andalusia. The firm holds multiple regional installation authorizations (low voltage electrical, water, thermal, gas, refrigeration) plus the AESSIA quality seal and the annually-renewed RS+ Social Responsibility seal.

The company's core technological differentiator is the ECOMESH second-generation hybrid solar panel, which simultaneously generates electricity and thermal energy in a single device, paired with an open-source, IoT-based energy management platform for energy communities that handles data monitoring, consumption comparison, energy flow control and fault detection. Notable reference projects include a monitoring engagement on the General Motors Figueruelas factory 11.5 MW rooftop PV plant (320,000 sqm, cited as the world's second-largest rooftop solar plant), an 84 kW hybrid installation on the Zaragoza City Council bus depot, and the first hybrid solar installation on a Spanish public building (Zaragoza Fire Station). The firm maintains an unusually active research footprint — over fifteen EU-funded R&D projects under Horizon 2020 and Horizon Europe spanning hybrid PV/T, thermal storage, circular energy, and energy community platforms (including CRETE VALLEY, Therminator, USES4HEAT, METABUILD, MiniStor, LowUp, Task 60, and CloudiFacturing).

Endef operates a direct-to-customer go-to-market: free personalized energy studies initiated through the website or phone (+34 976 365 811) feed an in-house engineering and installation team that executes the project end-to-end. Revenue is largely one-time project fees for solar installations (typical residential at 4,000-6,000 EUR; community installations at 25,000-30,000 EUR; large municipal/industrial projects reaching six figures), supplemented by recurring revenue from customized IoT energy monitoring platforms and preventive/corrective maintenance contracts. Spanish subsidies, which can cover 60-85% of installation cost in Aragon, materially shape effective customer pricing.

Name

Endef

Legal name

ENDEF ENGINEERING S.L.

Website

https://endef.com

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

11–50 employees

Short description

Endef (ENDEF ENGINEERING S.L.) is a Zaragoza-based solar installer and developer of ECOMESH hybrid panels that generate electricity and heat simultaneously, serving residential, commercial, municipal and neighborhood-community customers across Spain with turnkey PV installations, IoT energy management and R&D-driven solar technology.

Ownership category

akta.pro rank

Product category

Solar Installation Services

NAICS

Solar Electric Power Generation (221114), Electric Power Generation, Transmission and Distribution (2211)

SIC

Electric Services (4911), Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430), Air-Cond & Warm Air Heatg Equip & Comm & Indl Refrig Equip (3585)

akta.pro primary industry

Solar EPC & Construction (Utility-Scale, Rooftop, Balance of System) (EUAMABAB)

akta.pro secondary industries

Solar Thermal & CSP Systems (Collectors, Receivers, Thermal Storage, CSP EPC) (EUAMABAL), Solar Roofing & Roof-Mounted PV Systems (IMADAFAO), PV Balance of System (BOS) & Electrical Infrastructure (Inverters, Transformers, Cabling, Substations) (EUACAGAC)

Keywords

• Solar panel installation
• Hybrid solar panels
• Photovoltaic systems
• Energy management software
• Energy communities

Headquarters

HQ city

Zaragoza

HQ country

Spain

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Solar Installation Services: Turnkey solar panel installation for residential, commercial, municipal, and community customers. Projects range from small residential (2.5 kW) to large industrial (84 kW, 224 panels). Revenue is project-based, one-time per installation.
2. Energy Monitoring & Management Platform: Customized IoT energy monitoring and management platforms for municipalities, communities, public buildings, schools, and companies. Delivered as tailored server solutions with ongoing access.
3. Technical Maintenance Services: Preventive and corrective maintenance of installed solar systems (e.g., IES Miguel Catalán 7.5 kW system maintenance).

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

ENDEF designs, installs, and commissions turnkey solar photovoltaic and hybrid (ECOMESH) solar panel systems that simultaneously generate electricity and thermal heat for residential homes, commercial/industrial businesses, neighborhood communities, and municipal governments in Spain. The company complements its installation services with IoT-based energy management platforms, open-source energy monitoring software, and preventive/corrective maintenance of installed systems.

Product overview

ENDEF offers a comprehensive solar energy solutions portfolio centered on photovoltaic and hybrid solar panel installations across four main segments: residential homes (single-family dwellings), commercial/industrial companies, municipal government buildings (town halls), and neighborhood communities (collective self-consumption). The company provides end-to-end services from project conception through execution and maintenance, complemented by R&D projects in solar technology and energy management. The core offerings are supported by a Management Platform for Energy Communities enabling data monitoring and energy flow control, and IoT-based Smart Energy Management Systems for intelligent energy control in buildings. The company also supplies and installs ECOMESH hybrid solar panels (generating both electricity and thermal energy) and develops numerous European research projects including CRETE VALLEY, Circulink, PV-SolAir, Therminator, USES4HEAT, METABUILD, OPEN4CEC, CuBER, MiniStor, Neotec, LowUp, Task 60, and CloudiFacturing.

Differentiator

Problem solved

Functional benefit

Brands

• ECOMESH: Hybrid solar panel brand developed by ENDEF that generates both electricity and heat simultaneously. Second generation panels are referenced in multiple installations.

Products and services

• Solar Panel Installation for Homes Complete turnkey photovoltaic installation services for residential single-family homes, including panels, inverter, structure, protections, legalization, and grid connection. Targeted at individual homeowners seeking to reduce electricity bills and achieve energy independence.
• Solar Panel Installation for Companies
• Solar Installation for Town Halls and Municipalities
• Solar Installation for Neighborhood Communities
• Management Platform for Energy Communities
• Smart Energy Management Systems (IoE)
• Photovoltaic Monitoring Systems
• EV Charging with Solar Installation
• ECOMESH Hybrid Solar Panels
• Energy Communities Services
• Solar System Maintenance Services

Quantifiable outcome

• Electricity savings of 9,618 kWh/year and thermal energy savings of 31,184 kWh/year for the Zaragoza Fire Station hybrid installation (28 ECOMESH panels)
• +6 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Eight partnerships are on record, tiered core and minor.

• CIRCE (Centro de Investigación de Recursos y Consumos Energéticos)coreStrategic or Co-development PartnerENDEF collaborates with CIRCE on research projects including a desalination plant installation powered by hybrid solar panels and wind turbine. CIRCE appears as a key R&D partner for advanced solar and energy projects.
• Polytechnic University of MadridminorStrategic or Co-development PartnerCollaboration on the San Pablo residential building project where ENDEF, together with the university, designed, manufactured, and installed the first prototype of a novel passive solar heating system achieving up to 50% heating demand savings.
• ECOMESHcoreTechnology or IntegrationENDEF works extensively with ECOMESH 2nd generation hybrid solar panels — a key proprietary technology for simultaneous electricity and heat generation. ENDEF installs, distributes, and provides technical support for ECOMESH panels across Spain.
• Horizon 2020 / SME Instrument (EU)coreOthersENDEF obtained Phase 1 of the H2020 SME Instrument and participates in multiple Horizon 2020 projects including Task60, MiniStor, LowUP, CloudiFacturing, Buildheat, and SME Instrument. These are EU-funded R&D partnerships supporting innovation in solar technology.
• ECOOO (Solar Cooperative)minorChannel Partner/ Reseller/ DistributorENDEF installs solar systems 'through ECOOO,' a solar cooperative, for residential and commercial customers in Zaragoza and other locations. ECOOO acts as a channel or partner for customer acquisition in certain installations.
• SOMEnergía AragónminorChannel Partner/ Reseller/ DistributorENDEF serves as the installing company for the SOMEnergía Aragón cooperative's #EH!CO!Solar collective solar purchasing group, providing installations for community members.
• Zaragoza Vivienda (Municipal Housing Society)minorStrategic or Co-development PartnerENDEF partners with Zaragoza Vivienda on multiple European LIFE projects (New Housing Solution 4OLD) for building rehabilitation and solar installations in social housing.
• Association Memberships (Cluster Energía Aragón, Solartys, Secartys, UNEF, ADEA, CEPYME, Mercado Social, Pacto Mundial)minorOthersENDEF is a member of multiple industry and business associations in Spain including the Aragon Energy Cluster, Solartys (solar industry), Secartys (electrical sector), UNEF (solar employers), ADEA (entrepreneurs), CEPYME (SME employers), Social Economy Market, and UN Global Compact.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Abora Solar: Abora Solar is a Spanish manufacturer of hybrid solar panels with proprietary aHTech technology that generates electricity and thermal energy simultaneously. As a Spain-headquartered PVT specialist, Abora directly competes with Endef's ECOMESH offering in Iberian residential, commercial, and public-sector tenders.
• Holaluz: Holaluz is a Barcelona-based residential solar and green energy retailer operating across Spain with a customer-acquisition-led model similar to Endef's residential B2C motion. Both companies target Spanish homeowners with rooftop PV installations, though Holaluz operates at significantly larger national scale.
• Solimpeks: Solimpeks is a Turkey-headquartered manufacturer of hybrid photovoltaic-thermal (PVT) solar panels — the same product category as Endef's ECOMESH panels. Both companies compete on the value proposition of combined heat-and-power generation from a single rooftop-mounted panel and target residential, commercial, and district energy customers across Europe.
• Ecooo: Ecooo is a Madrid-based solar energy cooperative that designs, finances, and operates community solar projects in Spain. Ecooo is also documented as a channel partner for Endef installations, and both compete for the same cooperative/collective self-consumption customer segment in Spanish cities.
• Naked Energy: Naked Energy is a UK-based designer and manufacturer of hybrid PVT solar panels (Virtu and Vitron products) that produce electricity and hot water simultaneously. Like Endef, the company targets commercial, public-sector, and residential customers seeking combined heat and power from a single rooftop installation.

Regional players

• SOMEnergia: SOMEnergia is a Catalonia-headquartered renewable energy cooperative with an Aragon regional branch that runs collective purchasing groups (#EH!CO!Solar) in which Endef serves as the installing company. Both target residential and community solar customers in Spain but SOMEnergia operates across more autonomous communities.

Broad incumbents

• Repsol Solar: Repsol is a major Spanish integrated energy company with a growing solar generation and customer-energy-services business targeting residential and commercial self-consumption. As a broad incumbent in Spanish energy, Repsol competes for similar distributed solar customers and municipal contracts.
• Acciona Energía: Acciona Energía is a major Spanish renewable energy developer and operator with utility-scale and distributed solar assets, plus energy services for municipalities and large enterprises. Its broader portfolio and financial resources compete with Endef for large Spanish solar and municipal projects.
• Iberdrola Renovables España: Iberdrola is Spain's largest electric utility with significant solar generation, distributed energy, and energy services offerings. Iberdrola's broad renewable portfolio and financial scale position it as an incumbent competitor for the same enterprise, municipal, and large-rooftop solar customers that Endef serves.

Others

• Cogen España: Cogen España is the Spanish cogeneration association promoting combined heat and power (CHP) technologies — a concept adjacent to Endef's hybrid PVT panels that also deliver electricity and useful thermal energy from a single device. Both address the simultaneous production of heat and power, though Cogen España primarily represents combustion-based CHP rather than solar PVT.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/endefeng
• Facebookfacebook.com/endefengineering
• LinkedInlinkedin.com/company/endef
• Instagraminstagram.com/endef_solar

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

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 Endef