Scientific paper ID 2147 : 2021/3

Energy is the engine of civilization, but humanity is in danger of running out

of resources. Minerals - oil, gas and coal - are declining. Due to this, over time it is necessary

to make a transformation of the energy sector. New technologies need to be developed and

built and existing ones modernized. It is necessary to rely on technological modernization of

production and building installations and systems. Electricity billing costs are important for

all industrial, public and household subscribers. The constant increase in electricity prices on

the energy market predisposes to the demand for new, alternative sources of electricity, as

well as the need to build systems for autonomous power supply of buildings. In recent years,

the search for new ways to supply electricity to buildings and enterprises through renewable

energy sources has been encouraged, in order to reduce the value of electricity, or to use the

produced electricity to supply their own needs. The most common systems running on

renewable energy are photovoltaic systems. They have the greatest application compared to

other renewable energy sources. For the proper design and operation of such a system, it is

necessary to carefully study and properly select each component of the system. To support

this, the report presents the studied parameters with a meteorological station, necessary for

calculation by methodology, for building a photovoltaic system situated on the roof of an

existing enterprise, for additional power supply, in which the sun is used as an energy source.