28 Years of Professionalism and Success

28 Years of Professionalism and Success. SIELis the Italian Company which works internationally as an authoritative point of reference in two highly topical fields: electric power safety and renewable energy production. In its Italian headquarters of Trezzano Rosa, Milan, for almost thirty years SIEL has been producing emergency supplying systems for public and private customers, providing with “safe energy” several highly critical sectors such as infrastructures, finance, telecommunications, health service, mass retail and data centres.


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