In this thesis, different types of PVT (photovoltaic-thermal collectors) for three different farms in Europe will be studied, as part of the RES4LIVE project from the European Union’s Horizon 2020 Research and Innovation Action programme. A suitable renewable energy system will be proposed for each farm, considering the temperature range requirement and the climate conditions in each farm. In addition, three simulation tools that will be used, namely, WINSUN, Collector Energy Performance Tool (CEPT) and Scenocalc, will be evaluated and compared. The PVT systems combine the production of electrical and thermal energy. The combination of these two technologies can result in higher electrical efficiency due to the cooling effect of the fluid in the thermal part. Other technologies that form part of this study include the concentrating photovoltaic (CPV) and concentrated photovoltaic thermal (CPVT) systems. There are two types of flat PVTs, unglazed and glazed. The advantages and disadvantages of each system will be disclosed in the section on literature review. In addition, the operation of the concentrated collectors have been compared with the flat PVT collectors. Three simulation tools are being compared in this project and the most widely used tool is Scenocalc, the free tool supported by the European Commission. In the results section, the inputs for each simulation tool are explained, starting with the weather files that were taken at the same time for all the simulation tools so that the outputs could be compared. These results will be shown numerically for each farm and compared in tables and represented in graphs to decide which one is best for each location. The outcomes have shown that Scenocalc has a very different thermal result compared with the other tools in the case of the flat collectors. On the other hand, WINSUN has resulted to be a suitable simulating tool for a first approach to the production of the different technologies. In the case of CEPT, this program is best fitted for concentrated collectors since it takes into account both the thermal and electrical IAMs, whereas Scenocalc only considers the thermal IAMs.