How sunny is it outside right now - not just locally but all across Europe and Africa? Answering this question is at the heart of many weather-related business activities: solar power and the wider energy sector, architecture and construction, tourism, even health care.

"Today our audits form the basis of huge investments in the range of 50 million euros for single projects." - Gerd Heilscher from Meteocontrol, a company auditing photovoltaic systems and involved in ENVISOLAR.