The Swiss photovoltaic project planner Clevergie specialises, among other things, in building-integrated photovoltaics (BIPV). The company has had a new head office built for itself. Of course, modules are used here as part of the building envelope, which not only supply electricity but are also an integral part of the facade. Thus, the upper floor is completely covered with solar modules. In purely arithmetical terms, these supply more energy than the company needs in the building to provide electricity and heat.
You can read how this works in the full report on this extraordinary project. You can find the dossier in the project database of the Solar Age architecture portal. Use of the database is free of charge after registration and login.