Kalkener's online solar simulation software allows calculating solar thermal water heating systems:
the sizing of its main components according to the monthly, weekly and daily hot water consumption profiles, the solar site survey, the shading, orientation and tilt losses, the optimal position of solar collectors located on sloped roofs, the annual solar energy production (taking in account losses) and its key profitability indicators, (IRR and NPV).
The aim of this software is to calculate in an accurate, fast and cheap way all the neccesary data in order to make the proper decision on whether or not to invest in this type of facilities.

KALKENER Solar thermal software