SISI AG

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

SISI AG is a German renewable energy technology company founded in 2021 that develops and manufactures SOLESY, an innovative integrated energy system combining photovoltaics, solar thermal technology, and wind generation. The company provides intelligent, automated heating, cooling, electricity generation and storage solutions for residential and commercial buildings. SOLESY utilizes solar tracking technology to optimize energy production and includes automated cleaning systems. The technology is designed for 30-year lifespan with minimal maintenance. The company targets CO2-neutral energy independence for buildings and has received Solar Keymark certification, making systems eligible for subsidies in Germany, Austria, and Switzerland.