## 3 Results
### The Influence of the Application of Automated Control Systems in the Context of IoT  
In order to achieve a 20% or 32.5% reduction in energy consumption, it would be necessary to focus on automated control systems for individual households (flats) in the given localiy. Referring to the 2018 study of the \"Central Association of the Electrical and Electronics Industry\" (ZVEI-the main German trade association: Zentralverband Elektrotechnik-und lektronikindustrie e. V.), it states: Conclusion of the research on the issue of reducing energy consumption in the application of KNX automated control system: The use of modern electrical installation systems represents a significant potential for reducing energy consumption. Overall, when measures are implemented to optimise (technologies) control, the average energy savings range from 11 to 31%. When carrying out a reconstruction proposal for our urban area (cluster of buildings), energy savings of 12.6% were achieved. In the case of implementation of automation using KNX or FOXTROT control systems, or an ABB-free@home@ system, including IoT applications, energy consumption will be reduced by 11 to 31%. Finally, a 23.6 to 43.6% reduction in energy consumption in the given renovated locality can be achieved. It means that the energy reduction requirement according to Directive 2012/27/EU (Article 3) is fulfilled, as the maximum requirement is 32.5%. As for the estimate of the amount of CO\({}_{2}\) (in kg) emitted into the atmosphere due to electric power generation, based on the energy mix at a national level, the emission factor is assumed to be equal to 283.6 g CO\({}_{2}\)/KWh (ISPRA, 2015; [[http://www.isprambiente.gov.it/files/publication/rapporti/R_212_15.pdf](http://www.isprambiente.gov.it/files/publication/rapporti/R_212_15.pdf)]([http://www.isprambiente.gov.it/files/publication/rapporti/R_212_15.pdf](http://www.isprambiente.gov.it/files/publication/rapporti/R_212_15.pdf)) (accessed on 27 May 2016)). Based on this assumption, and taking into account the CO\({}_{2}\) emission reductions by 2030 according  
Figure 17: Block of Flats with Parterre. Vitézne námésti 577/2, Dejvice, Prague 6, Czech Republic. to paragraph 3.1.1, the CO\({}_{2}\) emissions should be reduced by 28%. Reconstruction of the buildings in the given locality will achieve a reduction in energy consumption of approximately 23.6 to 43.6%; so, when CO\({}_{2}\) production is reduced by 28%, the requirement of Directive 2012/27/EU is fulfilled as well. Design of a Photovoltaic System (Photovoltaic Power Plant) on the Roofs of Selected Area of Buildings  
The panel arrangement on the roofs of the building cluster is shown in Figure 18. Three options have been proposed:  
Option 1-SOLAR-TERRA SOLRIF, monocrystalline silicon cells, output: 120 W/m\({}^{2}\), rated output: 90 Wp. This is a BIPV solar panel with the possibility of customized panel production. Gains from the installation under consideration: 44,992.3 kWh/year. The roof plane facing the courtyard with a total area of 470.4 m\({}^{2}\) was considered for installation. Option 2-COPPO INVISIBLE SOLAR, monocrystalline silicon cells with a transparent layer, output: 83.3 W/m\({}^{2}\) (1 kW/12 m\({}^{2}\)). Rated output: 6 Wp. The gains from the installation under consideration on the area equal to 3/4 to 2/3 are 53,191.4 kWh/year. Option 3-MAXEON 3400 W mono PERC, output: 226 W/m\({}^{2}\), rated output: 400 Wp. The gains from the installation under consideration on the area equal to 3/4 to 2/3 are 53,650.8 kWh/year. Option 3, where the photovoltaic panel is installed on the roof of all the selected buildings, was the best one; it is not a panel with the possibility of integration into the roof plane. The suitability of this panel was also assessed in terms of aesthetic appearance. The installation is suitable for roofing facing the courtyard. These roof coverings are made up of a disparate material with no current requirement for appearance. It is a highly profitable option that will be effective even when placed on the part of the roof plane.