**5. Results and discussion**

Solar power is a huge source of electricity that can be used directly, generating other reservoirs of power: biomass, wind, hydroelectric power and wave power. While there are major differences in latitude and seasons, most Earth's area receives ample solar energy to enable low-grade heating of water and houses. Simple mirrors can focus solar energy enough at low latitudes to cook and even drive steam turbines. In certain semiconducting materials the energy of light switches electrons. This photovoltaic effect is able to produce vast amounts of electricity. However, the current low effectiveness of solar photovoltaic cells requires a great deal of energy. The only renewable way to substitute existing global electricity supplies from non-renewable sources is the immediate use of solar energy, at the cost of land areas of at least half a million km<sup>2</sup> .

The Roof top solution is supported by the design methodology for installing solar panels in Patyari Kaltan (Thali). The incorporation of the panels into the roof of the building is the strategy used. This solution is given when it replaces the traditional roof and permits the filtering of natural sunlight. It serves as roof for structural and weather requirements with structural support, stability, protection from damage such as chemical or mechanical damage, fire-fighting protection, sun, wind and moisture protection, heat absorption and heat conservation, light diffusion control etc. It acts as a power generator in addition to those functionalities by fulfilling a portion of the building's electrical load specifications. Due to the highly flexible design of the solar cells and the storage cells, individual roof capacity can be used for specific loads – top PEPS for the same energy need as the previously described loads. The mean Horizontal insolation surface incident is 4.134 KWh / m<sup>2</sup> / day and the clarity index estimate has been found to be 0.485.It is closely related to the solar radiation itself, but isolation gives you a more accurate way to calculate the radiation on an energy-relevant single object, rather than just taking a sunlight measurement itself. The clearness index is a calculation of the proportion of solar radiation emitted to the Earth's surface through the atmosphere. Research shows that the payback period for the solar project of the selected village is 1 year 6 months. It shows that the cost for installing the whole project can be recovered within 18 months which means solar project can be benifical for the Patyari Kaltan village.
