Photovoltaic-thermal (PV/T) systems offer a promising application of solar technology, providing both electrical and thermal energy efficiently. However, there is a notable research gap on the optimal use of cooling systems in PV/T systems. This paper attempts to bridge this gap by looking at the critical role of cooling with the help of several nanofluid such as uric acid, fatty acid, lauric acid, aluminum oxide in PV/T systems, highlighting its importance in maximizing thermal and electrical energy output. In addition, emerging technologies such as phase change materials and nanoparticles are being integrated with PV/T systems to maximize thermal energy storage and utilization. In this analysis found that the maximum thermal efficiency with uric acid followed by lauric acid, are 90% and 87.72%, respectively. While the electrical efficiency of uric acid and fatty acid are 19%, and 13.5%, respectively. The conclusion of the review study deals that when nanofluid cooling PVT systems were used in spiral channels the electrical efficiency increased by 37.67%, whereas when air mass flow rate is increased from 0.02 to 0.14 kg/s electrical efficiency rises by roughly 19–21%. Also found that with a 0.3 Vol% concentration ferrofluid (Fe3O4-water) overall efficiency of the system increased by 76% and the PVT system which used PCM reduced the cell temperature by 24% (up to 19 ℃) and increased electrical efficiency by 5.9%. As result of the analysis found the by using the PCM in PVT systems lead the production of electric energy and cooling process which will be helpful to the researcher for valuable information in area.