The goal is that the energy supply to an Active House shall be based on renewable and CO2-neutral energy sources in accordance with the energy performance classification chosen. Ideally, the building is able to cover the total energy demand with self-generated sustainably sourced energy.

From a building perspective, not all energy is valued the same. In order of relevance, first the building-coupled energy demand should be covered: heating, cooling, ventilation, and building installations. Second, the user-coupled energy demand should be covered: user appliances, warm water, and lighting. If a surplus of energy is still available, it can be used for non-building related energy demand, such as (electric) mobility. Any energy that remains after that can be fed into the main grid.

There are no specific requirements to where and how the renewable energy is produced. It must, however, be documented that the energy comes from renewable energy in the energy system.