In 1921, Jakob Sonn founded the specialist company Elektro Jakob Sonn in the Saar Palatinate town of St. Ingbert to carry out electrical installations in houses and agricultural enterprises. The young entrepreneur become known for his reliability and solid craftsmanship.

In 1932, Jakob Sonn relocated to Webenheim from St. Ingbert. At the same time, a household goods and agricultural tools business became associated with the company. The one-man operation quickly expanded into a small company and five years after it was established, Jakob Sonn had five employees.

Shortly after the World War II, Jakob transferred the management of the company to his son Ludwig Sonn, who continued expanding the business. Soon the family business needed more space. In 1955, the company headquarters in Webenheim was extended with a new workshop and new office space.

The company now employed ten people. Ludwig’s son Julius had ambitious goals when he joined the family business in 1960. By the third generation, the company had already acquired a huge amount of expertise – half a century of experience. Julius Sonn drew on this to turn the family business into a medium-sized company capable of providing technical support to the electrical engineering industry.

His plan worked: industrial companies in Homburg became the first major clients of the Sonn company. In 1980, the ongoing expansion of SONN ELEKTROTECHNIK GmbH made it necessary to relocate the company headquarters to today’s 4,500 m2 premises in Webenheim in the Saarland.

In 2006, the brothers Torsten and Holger Sonn founded SONN ENERGIE GMBH. The individual business units were then grouped together under the SONN GROUP umbrella.

In 2007, SONN ENERGIE GmbH became the first German electrical company to certify container transformer stations in accordance with IEC 62271-202 (internal arc classification). The company is building a new production facility on its 8.500m2 premises.

The SONN Group currently employs 95 staff.