This paper presents an applicative study designed to analyze PV power system energy installed at the UVT Campus' energy autonomy. The case study, analyzes the results obtained from the operation of the pilot building of the Institute of Multidisciplinary Research for Science and Technology (ICSTM). This building was designed and built according to worldwide directions in the areas of Near Zero Energy Building (nZeb) and buildings with scientific research laboratories specifics. The particular / specific problem, both at the constructive and installations levels, of great complexity, had been assessed and dimensioned at the level of energy balance with energy input obtained through Building Integrated Photovoltaic's (BIPV) technologies. The experimental results obtained demonstrate the achievement of very high levels of efficiency and economy in 2017 compared to the previous baseline year. Therefore, by consuming more efficiently and improving the PV absorption efficiency, savings of ~ 7800 Eur / 33% less energy absorbed from the national network (SEN) were achieved.