Photovoltaic is a renewable energy technology that creates electricity by converting the energy of light. Photovoltaics are usually installed on buildings. In this pilot study, the viability of such an installation on the roof of the school Heby skola is examined with respect to produced electricity, economic potential and environmental impact. This is done with the software Solelekonomi, together with 11-years of solar irradiance data and measurements of the properties of the intended roof, which made it was possible to simulate the production patterns of a photovoltaic system. The simulations were made on two possible system sizes 50 m2 and 200 m2 with respectively 7.75 and 31 kWpeak installed power. Among other things, the results showed that 1.1% and 4.45% of the total electricity consumption could be replaced by the systems. A PV investment was found to be a good option with respect to the sections examined. Furthermore, considering PVinstallations, the school was found to be representative for schools in Sweden, and thus this essay can provide a basis for other PV pilot project on Swedish schools.