SISI AG

Founded in 2021, SISI AG is a private company headquartered in Illertissen, Germany with approximately 11-50 employees specializing in Solar, Energy Storage, Other.

SISI AG is a family-owned renewable energy company founded in 2021 by inventor Martin Sigmund and his family. The company develops and manufactures SOLESY, an innovative integrated energy system that combines photovoltaic technology, solar thermal energy, and small wind generators with intelligent steering control. SOLESY enables residential and commercial customers to achieve energy independence and CO2 neutrality by automatically optimizing energy production and consumption. The system features patented vacuum tube collectors, automatic sun tracking, self-cleaning capabilities, and can operate in both heating and cooling modes. SOLESY is certified according to Solar Keymark standards and eligible for subsidies throughout the DACH region. The company serves as a mentor in the EXIST-Women program and is actively involved in advancing renewable energy solutions and the energy transition.