Competence, Innovation and Reliability.

For more than 50 years we have provided our customers with intelligent solutions for the planning and realisation of demanding projects. This experience means that we have a great deal to offer and can supply energy technology, building technology production from one source. Working together with the automation, plant engineering and process technology divisions of Frey Ingenieur Gesellschaft mbH we are a strong and competent partner for our customers.
 
 Frey Ingenieure
 Frey Stoll Trading China
 Stoll Energiesysteme
 Stoll Schweiz
 Bayrhof Stoll
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