Onyx Solar has provided its Building Integrated Photovoltaic (BIPV) solutions to install a photovoltaic double skin CESCE headquarters, known as CESCE tower, located in the heart of Madrid, Velazquez street to be precise.


The CESCE Tower is an office building located on Paseo de la Castellana in Madrid. It was built between 1970 and 1974, stands at a height of 115 meters, and has 28 floors. It serves as the headquarters for the Spanish Export Credit Insurance Company (CESCE), a public enterprise that offers comprehensive commercial risk management services.



frolunda culture house photovoltaic curtain wall onyx solar



  • superficieTotal Area - 273 M2
  • electricidad generadaElectricity generated in 35 years  -  537.958 kWh
  • puntos de luzTotal lighting points operating 4 hours per day in 35 years - 1000 lighting points
  • emisiones CO2 evitadas CO2 emissions Avoided in 35 years - 411.635 Tons of CO2
  • barriles petroleo ahorradosBarrels of oil saved in 35 years - 3500 barrels


Example of a feasibility study of amorphous silicon photovoltaic double skin in Madrid

  • superficie Payback time  < 3 years
  • electricidad generada Internal rate of return (IRR)  27 %




* Onyx Solar Energy S.L. makes no representations, warranties or guarantees, whether express or implied, that the content in the report is accurate, complete or up to date.



As part of the full refurbished they did, Onyx Solar has provided 855 units of Amorphous silicon photovoltaic glass, configuring this new double skin on the existing building. 


The CESCE Tower is currently undergoing a renovation process that commenced in 2021 and is expected to conclude in 2023. The project aims to revamp the building's facade, interior, and facilities to enhance its energy efficiency, accessibility, and integration with the urban environment. The redesign has been carried out by the architectural firm Touza Arquitectos.



The interior of the CESCE Tower is also being transformed to meet the evolving needs of employees and visitors. A spacious lobby is created on the ground floor, connecting seamlessly with the outdoors via a public plaza. Common areas and offices are reorganized to prioritize flexibility, natural light, and comfort. Intelligent systems are installed to optimize energy and water consumption, while sustainable and recyclable materials are used.

The renovation of the CESCE Tower is part of the Madrid Nuevo Norte urban development plan, which aims to regenerate the northern area of the city, establishing a new financial, residential, and cultural center. The CESCE Tower will be integrated with other iconic buildings such as the Cuatro Torres Business Area, the future Caleido skyscraper, and the Chamartín-Clara Campoamor station.


Owner: CESCE 

Architect: Tasvalor - Jose David Camara





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