Conclusions
Three alternative solar energy systems for a single family building were studied through energy performance simulations. The studied systems were a combination of solar thermal and PV (building A), uncovered PV/T or a combination of covered PV/T and PV (building B), and a system with only PV (building C). The systems are based on commercially available modules and standardized templates.
The objective of the comparative study was to evaluate whether the building with the different installations would reach a net zero energy balance. The goal was to balance the energy demand for operation, according to ambition level ZEB-O, as determined by Dokka et al. (2013). The auxiliary energy in the system was provided by an air-towater heat pump, which meant that the import/export energy balance could be calculated only in terms of electricity.