The subject of the project is the design, delivery and assembly of photovoltaic micro-installations in 114 residential buildings and 9 public buildings and solar collector installations in 76 residential buildings. In residential buildings there are 2 types of photovoltaic installations with a power of 2 kW and 3 kW and 4 types of solar collector sets. The main components of photovoltaic installations are: panels of 8 or 12 pcs, inverter and control-measurement module respectively. The solar system will consist of 2 to 5 collectors with equipment, and its task will be to support heating of water. In publ. utility buildings, photovoltaic installations ranging from 2 to 20 kW were designed. Each photovoltaic installation will operate in the on- grid system, the priority being to meet the current demand for electricity, and surplus electricity will be transferred to the power grid.