Comparison of power generation from solar panel with various climate conditionand selection of best tilt angles in Ulaanbaatar

The tilt angle of the photovoltaic (PV) array is the key to an optimum power generation. Solar panels or PV arrays are most efficient, when they are perpendicular to the sun´s rays. Optimal tilt angle of solar panel are different at places of the earth. In Ulaanbaatar that is coldest capital city, the optimal tilt angle is 30 degrees in summer and 60 degrees in winter. By the calculation, the average tilt angle of the solar panel in Ulaanbaatar that can produce annually large amount energy is around 45 degrees. But 45 degrees of tilt angle are not so suitable due to snow and ice accumulation on the solar panel during winter in Ulaanbaatar.