doppelintegral GmbH

Welcome to the website of doppelintegral GmbH

Our software company develops and distributes the simulation environment INSEL. We offer simulation services in all areas of renewable energy systems and energy efficient buildings.


Customer specific software solutions are available at low cost based on extensive INSEL model libraries. Complex simulation tasks can be solved with high accuracy. User friendly interfaces can be programmed according to the demand of the customer.

doppelintegral has also specialized in energy concept development for buildings and sustainable communities.