The first photovoltaic systems on the roof of the physics building was commissioned in 2008 – additional systems followed shortly afterwards. There are now a total of 8 photovoltaic systems with a total capacity of 675 kWp on the roofs of various university properties. Approximately 600,000 kWh of electricity is produced by these systems annually, a large amount of which is used directly by the university. It is enough to cover the annual electricity requirements of a department, for example the law department, or around 150 four-person households.
As a rule, the photovoltaic systems are built and operated by external investors from the solar industry. Freie Universität leases the roof surfaces and receives in exchange a percentage of the electricity. Particularly worthy of mention is the student project UniSolar, where students themselves initiated and financed one solar unit.