Tewer Engineering
Tewer Engineering is a Spanish engineering firm that designs, manufactures, and assembles proprietary CSP components — heliostats, sandwich facets, parabolic trough collectors, and ray-tracing simulation tools — for utility-scale solar developers and EPC contractors globally, with adjacent industrial and defense work.
- Company typePrivate
- Founded2014
- HeadquartersMadrid, Spain
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What Tewer Engineering does
Tewer Engineering S.L. is a Valdemoro (Madrid), Spain-based private engineering firm founded in 2014 that specializes in Concentrated Solar Power (CSP) technology, with an extended footprint in industrial engineering and defense. Its core CSP offering combines proprietary hardware — the HTW135 and ATH146 heliostats, Tewer-RST3 sandwich facets, WD3 parabolic trough collectors, and dish concentrators — with in-house ray-tracing simulation software, solar-field assembly lines equipped with a patented canting system, and full-scope CSP services from feasibility through commissioning. Performance is positioned at sector benchmarks: canting errors of 0.5–0.6 mrad, production rates of 40–50 heliostats per day (including a 50 heliostat/day line at Noor III with Batz Energy), and ATH146 optical quality below 0.6 mrad.
The company monetizes through hardware sales (heliostats, facets, collectors, self-deployable MSSR radar towers), professional services (simulation, engineering, feasibility, assembly), and co-financed R&D grants across multiple CDTI Misiones, Horizon 2020, and NextGenerationEU programs (PHOTON, LEIA, PhoToHy, NEOSOLAR, SOLAR-H₂R, SOPHIA, ThiCAV) totaling roughly €5.77M in subsidies. Customer logos include ACCIONA, Cobra Thermosolar Plants, Torresol Energy, Acwa Power, INDRA, CSIC, Avanzalia Energia, and Ecoembes; project geographies span Spain, Morocco, Chile, Germany, and the United States. Beyond CSP, Tewer delivers multi-sector industrial engineering (machining, casting, welding, prototyping) to automotive and railway clients and supplies transportable surveillance towers to defense customers such as INDRA.
Strategic focus has broadened from CSP components into adjacent decarbonization technologies — including additive-manufactured multi-material solar receivers (ThiCAV, July 2025), solar-driven green hydrogen (SOLAR-H₂R), and autonomous PV-powered heliostats (SOPHIA, patented) — while maintaining ISO 9001:2015 certification and a sales-led, project-based go-to-market targeting utility-scale solar developers and EPC contractors globally.
Tewer Engineering firmographics
Firmographics- Name
- Tewer Engineering
- Legal name
- TEWER ENGINEERING S.L.
- Website
- https://tewer.es
- Company type
- Private
- Founded year
- 2014
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Tewer Engineering is a Spanish engineering firm that designs, manufactures, and assembles proprietary CSP components — heliostats, sandwich facets, parabolic trough collectors, and ray-tracing simulation tools — for utility-scale solar developers and EPC contractors globally, with adjacent industrial and defense work.
- Ownership category
- akta.pro rank
Tewer Engineering industry classification
Industry- Product category
- Concentrated Solar Power (CSP) Equipment & Engineering
- NAICS
- Electrical Equipment Manufacturing (3353)
- SIC
- Misc Industrial & Commercial Machinery & Equipment (3590)
- akta.pro primary industry
- Solar Plant Components Supply & Manufacturing (Modules, Cells, Wafers, Mirrors, Heliostats) (EUACAGAK)
- akta.pro secondary industries
- Solar Thermal & CSP Systems (Collectors, Receivers, Thermal Storage, CSP EPC) (EUAMABAL), CSP Plant Development & EPC (Parabolic Trough, Tower, Linear Fresnel, Dish) (EUACAGAE)
Keywords
Where Tewer Engineering is headquartered
LocationHeadquarters
- HQ city
- Madrid
- HQ country
- Spain
- HQ region
- Europe
Offices1 record
Markets served
Tewer Engineering business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Technology or R&D, Operations, Supply Chain, Marketing or Sales, Infrastructure
Revenue model
- CSP Products Sales: Sale of proprietary solar components including heliostats (HTW135, ATH146), facets (Tewer-RST3), and parabolic trough collectors (WD3) for CSP plants.
- CSP Engineering Services: Comprehensive CSP project services including feasibility analysis, site assessment, technology assessment, electricity production estimations, basic engineering, project development, detail engineering of solar field, solar field control implementation, and commissioning support.
- CSP Simulation Services: Solar field simulation services using advanced software for mechanical, optical, thermal and performance modeling, including proprietary ray-tracing tools validated at Plataforma Solar de Almeria.
- Solar Field Assembly: Assembly services for heliostats and collectors including development of assembly lines, canting systems, and field assembly in existing plants. Delivered automated assembly lines producing up to 50 heliostats per day.
- Industrial Engineering Services: Industrial development services from concept to production including 2D and 3D design, FEM calculations, prototyping, testing, validation, and quality control plans for automotive, railway and other industrial sectors.
- Industrial Manufacturing: Manufacturing capabilities including machining, casting, welding, assembly, production cells, and process improvement services.
- Defense/Surveillance Products: Design, development and fabrication of self-deployable transportable towers for MSSR radar systems, with series production capabilities.
- Photovoltaic Services: Technical and economic evaluations, feasibility studies, review of detail engineering, execution and construction control, quality and traceability, approval and commissioning, and project management for photovoltaic projects.
- R&D Project Funding: Participation in publicly funded R&D projects through CDTI and EU programs including PHOTON, LEIA, SOLAR-H2R, PhoToHy, NEOSOLAR, ThiCAV, and SOPHIA. Projects receive co-financing ranging from 159,934 EUR to 2.5+ million EUR.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Tewer Engineering product offering
Product offeringCore offering
Tewer Engineering designs, develops, and manufactures proprietary concentrated solar power (CSP) components including heliostats (HTW135, ATH146), sandwich facets (Tewer-RST3), parabolic trough collectors (WD3), and dish concentrators, supported by proprietary ray-tracing simulation software and patented assembly line systems. The company also provides end-to-end CSP engineering services (feasibility, engineering, commissioning) and extends its manufacturing expertise into defense (self-deployable MSSR radar towers) and industrial sectors (automotive, railway).
Product overview
Tewer Engineering is a technology partner for Concentrated Solar Power (CSP) solar fields, offering an integrated portfolio of products and services. The core product line includes the Tewer-RST3 sandwich facets, HTW135 two-axis heliostats, WD3 parabolic trough collectors, and Dish Concentrators—all designed for maximum optical performance at competitive costs. Supporting these hardware products are proprietary CSP Simulation Software using Ray-Tracing methodology, and custom Solar Field Assembly Lines with patented canting systems. The company also offers CSP Services (feasibility, engineering, commissioning), Industrial Engineering Services (design, prototyping, testing), and Photovoltaic Services. This integrated approach combines proprietary products with engineering services across product development, manufacturing, and assembly.
Differentiator
Problem solved
Functional benefit
Products and services
- HTW135 Heliostat Two-axis solar tracker heliostat based on torque tube architecture with anti-astigmatism ring and front tensioners, designed for container transport and high-performance solar field construction with optical quality better than 1 mrad. Targeted at utility-scale CSP plant developers and EPC contractors.
- ATH146 Heliostat 146 m² heliostat with 32 facets of innovative configuration supporting a high-reflectivity solar mirror on three linear profiles with six fixation points, achieving optical quality below 0.6 mrad. Co-developed with ACCIONA for utility-scale CSP tower plants.
- WD3 Parabolic Trough Collector Parabolic trough solar collector with RP3-type mirrors based on a torque tube and cantilever truss arms structure, designed for utility-scale parabolic trough CSP plants. Each Solar Collector Assembly (SCA) is 150 m long, composed of 12 SCEs of 12.3 m each, providing 817.5 m² of effective reflective area.
- Tewer-RST3 Sandwich Facet Sandwich-type solar reflector facet featuring a Solar Foam polymeric foam core that supports reflector life without characteristic variation, with a reduced-thickness front mirror layer for improved optical performance. Targeted at CSP heliostat and trough field developers requiring long-life, high-quality reflectors.
- Dish Concentrator Dish-type solar concentrator designed for high-efficiency Stirling engine applications, combining a large reflective surface with short radii of curvature and high optical quality facets for distributed solar power generation.
- Self-Deployable MSSR Radar Tower Self-deployable, transportable tower system designed and fabricated for MSSR radar systems in air surveillance, capable of operating at temperatures as low as -40°C. Targeted at defense integrators (validated by delivery of 8 units to INDRA).
- CSP Simulation Software Proprietary software suite for solar field efficiency calculations, plant production output estimation, energy flow mapping on receivers, pointing strategies, slope error analysis via image processing, and Ray-Tracing-based distribution of energy in CSP tower plants. Targeted at CSP developers and EPC contractors needing accurate solar field modeling.
- Solar Field Assembly Lines Custom heliostat and collector assembly line systems incorporating Tewer's patented canting system to achieve high-volume production with low assembly cycle time and precise optical quality. Delivered to Crescent Dunes (Tonopah, Nevada) and Noor III (Morocco) to support utility-scale CSP plant construction.
- CSP Project Engineering Services Comprehensive CSP project services spanning feasibility analysis, site assessment, technology assessment, electricity production estimations, basic engineering, project development, detail engineering of solar fields, solar field control implementation, and commissioning support. Targeted at solar energy developers and EPC contractors.
- Industrial Engineering Services Industrial product development services from concept to production including 2D and 3D design, FEM calculations, prototyping, testing, validation, and quality control plans, combined with machining, casting, welding, assembly, production cells, and process improvement. Targeted at automotive, railway, and other industrial manufacturers.
- Photovoltaic Project Services Technical and economic evaluation services for photovoltaic projects including feasibility studies, regulatory compliance, engineering review, execution and construction control, quality and traceability control, approval and commissioning, and project management. Targeted at photovoltaic developers and project owners.
Quantifiable outcome
- 40 heliostats/day production capacity with 0.5-0.6 mrad canting error at Crescent Dunes
- +6 more outcomes
Companies that use Tewer Engineering
Customer profileNamed customers10 records
Segments4 records
Ideal customer profiles4 records
Tewer Engineering technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature12 records
Tewer Engineering partnerships and signals
Strategic signalPartnerships
20 partnerships are on record, tiered core and minor.
- Procada (Sweden)coreThiCAV project partner from Sweden. Collaboration on development of innovative multi-material solar receivers using additive manufacturing (WAAM) technology.
- University WestcoreThiCAV project partner. Contributes academic research expertise in additive manufacturing (WAAM) technology for developing solar receivers with high thermal inertia.
- NANOGAP SUB-NMPOWDER S.A.coreSOLAR-H2R project consortium partner. NANOGAP is a spin-off of the Universidad de Santiago de Compostela, pioneering AQC (Atomic Quantum Cluster) catalyst technology for hydrogen production. Also provides AQC technology for PhoToHy project.
- POWER2HYDROGEN S.L. (HYSUN)coreSOLAR-H2R project consortium partner specializing in hydrogen production technology. Project focuses on 100% renewable hydrogen production through solar concentration and photo-thermo-catalysis.
- Universidad de Santiago de Compostela (USC)minorSOLAR-H2R project collaborating university contributing academic research expertise to the hydrogen production initiative.
- Universidad Carlos III de Madrid (UC3M)minorSOLAR-H2R project collaborating university contributing academic research expertise to the solar-driven hydrogen production research.
- CIEMAT-PSA (Plataforma Solar de Almería)coreLEIA project collaboration. Testing and validation of ATH146 heliostat and Tewer's solar sensor at the Plataforma Solar de Almería, the world's largest solar thermal research center. CIEMAT-PSA is a key research partner for solar field testing and validation.
- Fundación CENERcoreLEIA project partner. CENER (National Renewable Energy Center of Spain) contributes research expertise to the LEIA project focused on next-generation CSP plant development.
- DLR (German Aerospace Center)coreLEIA project international partner. DLR contributes research capabilities to the project focused on solar field measurements and CSP plant optimization.
- Siemens EnergyminorLEIA project partner representing EPC and end-user perspective to ensure global replicability of the project outcomes.
- INAEL ELECTRICAL SYSTEMS S.A.corePhoToHy project leader. Specialized in development of new products and technologies for electricity distribution and transport sector. Consortium partner for photocatalytic hydrogen generation project.
- KERIONICS S.L.corePhoToHy and NEOSOLAR project consortium partner. Technology startup specializing in design and manufacture of ceramic membranes for efficient gas separation. Contributes membrane technology for hydrogen production processes.
- INTECSA INGENIERÍA INDUSTRIAL S.A.coreNEOSOLAR project consortium partner. Specialized engineering company contributing to development of green hydrogen technologies through innovative solar thermal plants with storage.
- ESASOLAR ENERGY SYSTEM S.L.coreNEOSOLAR project consortium partner specializing in solar energy systems contributing to the green hydrogen value chain development.
- MC2 INGENIERÍA Y SISTEMAS S.L.minorNEOSOLAR project consortium partner contributing engineering and systems expertise to the initiative.
- RIOGLASS SOLAR SCH S.L.minorNEOSOLAR project consortium partner specializing in solar glass technology for CSP applications.
- ALFRANminorNEOSOLAR project consortium partner contributing specialized expertise to the green hydrogen technology development.
- ACCIONAcoreJoint development of ATH146 heliostat (146 m2, 32 facets, <0.6 mrad optical quality). Long-standing collaboration in solar energy projects including PHOTON project. ACCIONA is a key client and development partner for Tewer's heliostat technology.
- Batz EnergycorePartnership for assembly line development at Noor III, Morocco. Patented designs boosted capacity to 50 heliostats (178m2) per day with outstanding canting accuracy.
- PHOTON Project Consortium (EU)coreEuropean project 'High-performance solar thermal power plants based on hybrid Solar-PV heliostats and tailormade collectors'. Tewer leads the project with ACCIONA and international partners. Develops smart spherically curved sandwich facets, autonomous PV-powered heliostats, and optimized receivers.
Scale indicators13 records
Recent moves6 records
Expansion highlights6 records
Tewer Engineering competitors and assessment
Company assessmentDirect peers
- SENER: Spanish engineering group with one of the deepest CSP heritages globally, having developed heliostat fields, collector systems, and molten-salt tower technology. SENER competes with Tewer in CSP engineering services and proprietary component supply, particularly in tower and parabolic trough segments.
- BrightSource Energy: US-based CSP tower developer focused on utility-scale solar thermal plants (e.g., Ivanpah). Comparable to Tewer on the technology axis (tower heliostat fields), though positioned further downstream as a developer/owner rather than equipment supplier.
- John Cockerill (John Cockerill Renewable): Belgian engineering group supplying heliostat fields, solar receivers, and balance-of-plant for CSP tower plants (e.g., NOOR projects). Direct competitor in heliostat manufacturing and CSP plant supply chain integration.
- TSK: Spanish EPC contractor active in solar thermal and renewable energy projects. Overlaps with Tewer on engineering, assembly, and EPC service offerings for CSP and broader renewable infrastructure in Iberia.
- SCHOTT Solar: German specialist in solar thermal receiver tubes and CSP components. Comparable to Tewer's receiver and optical-component work, with particular overlap in high-temperature receiver manufacturing and precision glass/mirror supply for CSP plants.
- Rioglass Solar: Spanish manufacturer of parabolic trough mirrors and CSP glass components — a direct counterpart to Tewer's RST3 facets and mirrors. Rioglass is also listed as a NEOSOLAR consortium partner, indicating both partnership and supply-chain overlap.
Broad incumbents
- Abengoa: Historically one of the world's largest CSP developers and EPC contractors (Solucar, Solana). Despite restructuring, retains deep CSP engineering competence and overlaps with Tewer on tower and trough technology supply — although Abengoa operates at much broader scope including biofuels and power transmission.
- Torresol Energy: Spanish CSP platform jointly owned by SENER and Abu Dhabi Future Energy Company, operator of the Gemasolar plant. Overlaps with Tewer as both a customer (commissioned the Gemasolar heliostat rebuild) and as a CSP technology platform pursuing similar engineering innovations.
Emerging players
- SolarReserve: US-based molten-salt tower CSP developer with Crescent Dunes and international project pipeline. Direct technical overlap with Tewer's tower CSP capabilities and a customer-adjacent peer via the Crescent Dunes heliostat work.
- Toptec Solar: Korean heliostat and solar field integrator with active commercial deployments. Comparable niche positioning to Tewer as a specialty heliostat/CSP field assembly supplier targeting utility-scale projects.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Tewer Engineering social profiles
Digital presenceTewer Engineering compliance and trust
Trust signalCompliance1 record
Tewer Engineering financial estimates
Financial estimateRevenue estimate
Valuation estimate
Tewer Engineering leadership team
Management profileNumber of profiles
Profiles1 record
Tewer Engineering funding detail
Funding detailFunding overview
Funding rounds1 record
Investors1 record
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Tewer Engineering M&A and investment
M&A and investmentM&A
Investments1 record
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Tewer Engineering
What does Tewer Engineering do?
Tewer Engineering designs, develops, and manufactures proprietary concentrated solar power (CSP) components including heliostats (HTW135, ATH146), sandwich facets (Tewer-RST3), parabolic trough collectors (WD3), and dish concentrators, supported by proprietary ray-tracing simulation software and patented assembly line systems. The company also provides end-to-end CSP engineering services (feasibility, engineering, commissioning) and extends its manufacturing expertise into defense (self-deployable MSSR radar towers) and industrial sectors (automotive, railway).
Is Tewer Engineering a public or private company?
Tewer Engineering is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Tewer Engineering founded?
Tewer Engineering was founded in 2014. It employs 11 to 50 people.
Where is Tewer Engineering based?
Tewer Engineering is headquartered in Madrid, Spain, in the Europe region.
How does Tewer Engineering make money?
Nine revenue lines are on record. CSP Products Sales are the primary driver. The others are CSP Engineering Services, CSP Simulation Services, solar Field Assembly, industrial Engineering Services, industrial Manufacturing, defense/Surveillance Products, photovoltaic Services and R&D Project Funding.
Who are Tewer Engineering's main competitors?
Direct peers on record are SENER, BrightSource Energy, John Cockerill (John Cockerill Renewable), TSK, SCHOTT Solar and Rioglass Solar. Broad incumbents are Abengoa and Torresol Energy. Emerging players are SolarReserve and Toptec Solar.
Does Tewer Engineering have an API?
No public API is recorded for Tewer Engineering.
What industry is Tewer Engineering in?
Tewer Engineering's product category is Concentrated Solar Power (CSP) Equipment & Engineering. Its primary akta.pro industry code is EUACAGAK, Solar Plant Components Supply & Manufacturing (Modules, Cells, Wafers, Mirrors, Heliostats), with a secondary code of EUAMABAL, Solar Thermal & CSP Systems (Collectors, Receivers, Thermal Storage, CSP EPC). Its NAICS code is 3353 and its SIC code is 3590.