Electricity is an indispensable component of human life today. Every day there is an increasing emphasis on the production of clean electricity without greenhouse gas emissions. Renewable energy sources are taking an increasing share of total production. The energy of the Sun is an inexhaustible source of energy and is available everywhere in the world in sufficient quantity. Photovoltaic panels are a newer technology of electricity production, whose popularity is growing every year. In order to be efficiently produced, it is necessary to make detailed analyzes before the installation of the plant itself. Computer models and simulations greatly help us in the general understanding of physical phenomena and also help us make further decisions. In this paper, I made analyzes of the cooling of panels with ambient air. I drew the photovoltaic panel according to the actual dimensions in the Autodesk Inventor program, and the simulation was carried out in Ansys Fluent for 2D and 3D geometry. The emphasis of the simulations was a 3D simulation giving relatively accurate insight into phenomena on and around the panels. The aim of the work was to obtain a temperature picture of the panel for different inclinations and different wind blowing directions. After the obtained temperature picture, it was necessary to extract the heat transfer coefficient from the panel to the surrounding air and draw a conclusion from it about the behaviour of the panel. After the simulations, I concluded that the photovoltaic panel can work in all positions without overheating, and I explained the relationship of the wind vector and the heat transfer coefficient. As well I explained the connection between temperature, voltage, current and efficiency of PV.