About us

Mefta Green Transfo Energy Poland, known as the Mikolow Transformer Factory,
is a world-renowned Polish manufacturer of medium voltage distribution transformers

Our factory is located in Silesia, in Mikołów, and has been operating continuously at this location since 1945, delivering high-quality oil-filled and dry resin transformers for power networks, industry and individual customers. Our transformers have been entirely manufactured in Poland for years and successfully operate worldwide under the brands of major power industry giants such as AEG, Alstom, Areva, and Schneider Electric, whose corporations the Mikolow Transformers Factory was part of for many years. Under the Schneider Electric brand, the Mikolow Transformer Factory operated for the last 12 years before becoming MEFTA Green Transfo Energy Poland in 2023, when it joined the Green Transfo group, part of the French Cahors corporation.

Modern Infrastructure

We have a modern infrastructure located in 15,000 m² of production and storage halls. Our specialization includes transformers up to 7 MVA and 36 kV (oil transformers) and up to 6 MVA and 36 kV (dry resin transformers).

All the main components of our transformers, such as the transformer core, HV and LV coils, and the transformer tank, are produced in our factory in Poland, in Mikołów. This gives us full control over the materials and methods used in building the transformers we offer. We do not use ready-made products or semi-finished goods from outside Europe.

In January 2023, after Green Transfo SAS acquired the Mikolow Transformer Factory from Schneider Electric, we became part of the international Cahors capital group — a corporation operating in the power engineering sector. The factories belonging to the Cahors capital group are located in different countries and specialize in selected product groups, which allows for maximizing the efficiency of the entire supply chain. Thanks to this, the Cahors Group, including the Green Transfo Group, can deliver as many as 32,000 transformers annually to global markets, including oil and dry distribution transformers, as well as transformers with power ratings up to 120 MVA and nominal voltages up to 170 kV.

Quality, Safety, and Sustainable Development

We hold ISO certificates confirming compliance with international standards for quality management, safety, and environmental protection. We focus on the continuous improvement of production processes and a responsible approach to sustainable development and the energy of the future.

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Quality, Safety and Sustainable Development

Our values

Business Ethics

We operate according to the highest ethical standards, ensuring honesty, transparency, and responsibility in every aspect of our activities. Respect and equal treatment are fundamental to us - regardless of origin, gender, religion, age, or sexual orientation. We believe that trust is built through actions, which is why we consistently adhere to our Code of Ethics and Conduct.

Customer Satisfaction

We base our relationships with customers on trust, open communication, and full commitment. Our priority is to understand our clients’ needs and provide thoughtful, reliable solutions—often before a specific request even arises. We are here to make life easier for our business partners.

Quality

Striving for excellence is our everyday commitment. Precision, reliability, and consistency are the qualities that enable us to offer products and services that meet the highest standards.

Sustainable Development

We understand that the future of our planet depends on the decisions we make today. That is why we actively support initiatives for environmental protection, fair trade, and social cooperation.

History of our factory

Our roots date back to 1945, when the state-owned enterprise Mikolow Transformer Factory Mefta was established to produce transformers for the needs of a developing country. Since then, we have continuously grown as a center of competence and technology in the field of transformers. Our over 80 years of experience is the foundation on which we build the future of sustainable energysector.

1945

The history of the Transformer Plant in Mikołów dates back to 1945, when the company Elektrobau was nationalized (February 28, 1945).

1992

After the company was transformed into a state-owned enterprise, dynamic development followed — increased production, expanded product range, and growth in the number of employees.

1992

Nearly 50 years later, after the political transformation, the privatization - in 1992 - of the Mikolow Transformer Factory "Mefta" was carried out, and the plant was incorporated into the structure of the international AEG group (17 December 1992).

1995

In 1995, production in the new hall was launched, and further transformations of the company continued: the merger of AEG and GEC Alsthom – the name was changed to GEC Alsthom (1997), and later to Alstom (1998).

2001

In December 2001, the consolidation of Alstom Group companies in Poland took place.

2004

In 2004, following the acquisition of the Transmission and Distribution sector from ALSTOM by the AREVA group, the company changed its name to AREVA T&D.

2010

In June 2010, the Schneider Electric group acquired the distribution division from the French group AREVA T&D, which resulted in the company being renamed Schneider Electric Energy Poland sp. z o.o. (in 2017, the name was changed to Schneider Electric Transformers Poland sp. z o.o.).

2023

In 2023 (January 5, 2023), the factory changed ownership once again, becoming part of the Cahors capital group within the Green Transfo subgroup, and adopting the name Mefta Green Transfo Energy Poland.

What makes us Green?

Our commitment to sustainable development is not just a declaration but an integral part of our strategy and daily operations. At Mefta Green Transfo, we recognize the urgent need to protect the environment and actively take steps to minimize our negative impact, including reducing our carbon footprint. Through systematic optimizations, our processes are becoming increasingly energy-efficient – year after year, we reduce energy consumption.

In our production processes, we use environmentally friendly materials, aiming to reduce the use of natural resources and minimize waste. We invest in innovative technologies and solutions that allow us to produce transformers with higher energy efficiency, contributing to lower energy consumption for our customers.

Our mission and vision clearly highlight sustainable development as one of the key pillars of our operations. We believe that business success and environmental responsibility go hand in hand. Through our actions, we aim to have a positive impact on the environment and the communities we serve, helping to build a future that is more sustainable for the next generations. We prioritize climate action, understanding that it is essential for the long-term success of our company and the future of our planet.

Company Policy

At Mefta Green Transfo, delivering the highest quality services to our clients is possible thanks to the consistent implementation of key principles and policies. Each of the documents below reflects our approach to ethics, equality, sustainability, and social responsibility.

Code of Conduct

We believe in the highest ethical standards and transparency in all business activities and relationships with stakeholders. Our Code of Conduct defines the foundation of our commitment.

Ethics Policy

This document sets out the principles and standards that guide us in every area of our operations — from management decisions to the daily work of our team. Honesty and responsibility are values we consider non-negotiable.

Equality and Diversity Policy

Diversity is a driving force behind innovation for us. We create a work environment where everyone feels valued and treated fairly—regardless of background, gender, orientation, or beliefs.

Modern Slavery Prevention Policy

Green Transfo SAS conducts its business in an ethical and responsible manner. We apply a zero-tolerance policy towards all forms of slavery and human trafficking.

Climate Neutrality (Net Zero Emissions)

We recognize the urgent need to combat climate change. We are committed to reducing greenhouse gas emissions and taking actions aimed at achieving climate neutrality.

Anti-Corruption Policy

We conduct all activities transparently and in compliance with applicable laws, including regulations related to the prevention of corruption and bribery.

Social Responsibility Charter

As an active participant in the energy transition, we combine business growth with social responsibility. Our CSR strategy supports sustainable development and social engagement.