Sector coupling refers to the integration and coordination of different energy sectors – usually heating, industry, mobility and electricity. In a coupled system, these sectors are connected in a way that allows them to exchange energy with each other. The overarching goal is to drive the adoption of renewable energies by facilitating a more efficient and interconnected use of resources. For example, excess electricity from wind and solar power can be used to produce hydrogen through electrolysis, which can then be used as a fuel for transportation or heating. Similarly, waste heat from industrial processes can be used for space heating or to generate electricity.