About Us

Cerisol Company

About us

CERISOL is a technical expert manufacturer of state-of-the-art porcelain insulators for substations, disconnectors, bushing and transformers (hollow insulators) and insulators for railway applications. These were further developed in-house, allowing production of high-quality products with efficient designs, tightest tolerances and shorter lead times for applications up to 800 kV AC and up to 500kV DC.

Thanks to decades of excellence in research, engineering, production and service, in addition to the millions of insulators in service guaranteeing impeccable performance across the globe, Cerisol has gained a reputation for unrivaled technical expertise and innovation.

experience and development

+70 years

increasing capacity every year

+6.000 ton. per year

fully committed and dedicated

+180 employees

Trust in our products

+50 countries



Brief History

Focus on the future capitalizing the experience from the past.

Cerisol is focused on the future without forgetting the past, all the history and the experience gather for more than 100 years.

The company was founded in 1912 with the aim of producing a very diversified mix of electrical appliance of low voltage products for home usage. Progressively the company increased its portfolio of products to become a supplier of products for the industry such as cap and pin porcelain insulators for the Portuguese grid.


In 1967 the first IEC outdoor post insulator was manufactured for a voltage level of 66kV. With the increase of opportunities in the 70’s and 80’s in Portugal and abroad associated with a strong development of the product portfolio namely outdoor post insulators, hollow insulators and insulators for railway applications, a spin-off company from the Electro-Cerâmica group in 1989 was officially created as Cerisol.

In 2004 a new stage began to Cerisol when it was acquired by a new group of shareholders. In the following decade (2011) Cerisol moved to a new plant in Serzedo, V.N. de Gaia, boosting the manufacturing capacity, mainly focus on porcelain post insulator up to 800kV.


Sustainable development and ensuring Health and Safety in the Workplace

Our Company Mission, Vision and Values


Cerisol intends to be a key partner in the relationship with its customers and stakeholders, through the development of solutions adapted to the expectations, privileging the quality, the minimization of environmental impacts and the safety of all the elements involved.


Cerisol intends to be a reference in the domestic and international markets where it operates, promoting the conditions of operation and outstanding levels of reliability of the high voltage networks in which the insulators it manufactures are integrated.


Commitment – listen to all stakeholders, their expectations, providing a service aimed at their satisfaction, as well as for compliance with all legal, regulatory, and other requirements applicable to the activity. Our success is based on the quality and performance of our products, services, and people.

Quality – establish strategic objectives that enable the company to continuously improve the quality of its products and services.

Efficiency – Cerisol is committed to operational excellence using its resources in the most efficient manner, thriving for continuous improvements while celebrating the achievements of our employees.

What Our Clients Have to Say...

“In the last 10 years, we have successfully installed and put into service a large variety and quantity of insulators (up to 500kV voltage level) from Cerisol that have met and exceeded our quality and level of service expectations.”

Vicent Maerens, Managing Director EGIC

“Our experience with Cerisol’s post insulators has been excellent.  And we can see how their service is adding value to our operations.”

Departamento de Compras de RED ELECTRICA de ESPAÑA (REE)

“Cerisol S.A. has been a credible supplier of porcelain insulators of ours since 2010 (medium and high voltage up to 400kV) and has always met our high corporate quality requirements again and again.”

ABB Bulgaria, Supply manager

“Cerisol has established itself as a reliable supplier of porcelain insulators (medium and high voltage up to 400kV) for us for over a decade. Cerisol continually meets our standards and are a pleasure to work with.”

Grid Solutions - Vernova, Site Sourcing Manager

“Cerisol has been supplying porcelain post insulators to our substation projects for several years, starting in 1997. They have consistently met our quality and service level standards with the products they have supplied over the years.”

FINGRID Oyj, Substation projects

“EFACEC has supplied disconnectors equipped with Cerisol post insulators (medium and high voltage up to 400 kV) in several projects for Saudi Electricity Company (SEC) for more than a decade. Cerisol has become one of our most dependable suppliers, consistently meeting or exceeding our standards for quality and service time and time again.”

EFACEC, Tendering Manager

“Cerisol has great expertise in the design and manufacturing of station post insulators, and they produce a high-quality product. CPG has been working with Cerisol since 2017 which has resulted in great commercial success. Cerisol’s excellent technical and quality support were instrumental in helping help us get our station post insulators approved at Hydro-Quebec from 25 to 800 kV.”

Alain Berthier, General Manager, CPG East

Customer Who Trust Cerisol

Worldwide Locations

Where to find us