ABSTRACT
This demonstrates the very important influence of energy pricing and governmental supporting actions on the economic performance of solar energy systems.
For German-speaking users there exists a software product, OEKO-RAT,3 which calculates all values of interest for an economic evaluation of solar and energy-saving systems (payback time, internal interest
rate, annuity, required initial funding, required energy price, required energy price increase) under a userfriendly surface.
