Bernard Bonnefond
ST ETIENNE, France · Manufacturing and Industry
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Last verified
May 2026
Overview
Bernard Bonnefond is a leading French manufacturer of on-load stepless variable voltage transformers, serving industries such as glass, steel, chemical, and test platforms. Based in Saint-Etienne, we specialize in providing high-efficiency and reliable electrical solutions with a history spanning over 97 years.
Our core business focuses on delivering VARIVOLT transformers, renowned for their 95% efficiency from 25% to 100% load and power factor of 0.94. We cater to a diverse range of applications, including network stabilization, wind and tidal energy, and industrial process control.
What distinguishes Bernard Bonnefond is our commitment to long-term reliability – our transformers boast a lifetime exceeding 40 years and spare parts availability for over 40 years. We are proud to be a trusted partner to businesses across Europe and globally, supported by financial backing from the Auvergne Rhône-Alpes region and recognized with the EcoVadis badge for our sustainable practices.
Our core business focuses on delivering VARIVOLT transformers, renowned for their 95% efficiency from 25% to 100% load and power factor of 0.94. We cater to a diverse range of applications, including network stabilization, wind and tidal energy, and industrial process control.
What distinguishes Bernard Bonnefond is our commitment to long-term reliability – our transformers boast a lifetime exceeding 40 years and spare parts availability for over 40 years. We are proud to be a trusted partner to businesses across Europe and globally, supported by financial backing from the Auvergne Rhône-Alpes region and recognized with the EcoVadis badge for our sustainable practices.
Contact Details
+334 77 95 30 00
general@bernardbonnefond.com
ST ETIENNE, France, 7 ALLEE MATHIEU MURGUE
+1
Founded
1925
Company Type
Private Limited Company
Employees
30-50
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