Aim In this study, by using nanofluids obtained by adding 1% Fe2O3, Fe3O4 and NiFe2O4 magnetic nanoparticles by weight to the basic fluid water, a bidirectional performance increase was achieved. By increasing the thermal heat transfer of the PV/T system while providing more cooling of the PV system. cal and thermal efficiency of the PV/T module Design & Methodology Experimental Set up; the names of the materials belonging to the experiment set, the modules they belong to and the parts properties are given. Fotovoltaic solar panels are mounted on the same platform.Preparation of the Magnetic Nanofluid; Originality The most important feature and originality of our study was that until this time the studies required numerical.The fact that the obtained hot fluid has many application areas such as space heating, heating of greenhouses, use in drying systems, use as a heat source in heat pumps also causes PV/T systems to gain importance. Findings By using nanofluids obtained by adding 1% Fe2O3, Fe3O4 and NiFe2O4 magnetic nanoparticles by weight to the basic fluid water, Since the amount of heat absorbed in the thermal system is high, an average of 10,4% temperature (Delta T) increase in the hot fluid temperature compared to the base fluid water was obtained in the NiFe2O4 nanofluid. Conclusion PV/T systems are one of the subjects that scientific studies have focused on in recent years. The main reasons for this are to increase the electricity generation performance of PVs, as well as to obtain thermally hot fluid from the system Declaration of Ethical Standards The author(s) of this article declare that the materials and methods used in this study do not require ethical committee permission and/or legal-special permission.