In view of such problems as improper selection of specification and insufficient consideration of affecting factor of photovolatic power of outdoor monitoring devices

the key influencing factors of generation efficiency of solar panel installed in Xi’an is studied in this paper. Firstly

based on the typical meteorological data

the direct and scatter ratio of irradiance

the annual irradiance difference in each direction and the daily variation curve in winter

the power generation efficiency under different working conditions is studied. It is concluded that south-west orientation and 32° tilted installation is beneficial to improve the winter efficiency of solar power supply. Then

fo

r the serious dust accumulation problem in the Northwest region in China

a plentiful experiments on the loss relationship between dust and output power are carried out

finding that they show the feature of power function. When the dust density reaches 12 g/m

3

the power generation efficiency decreases by about 17.5%. Finally

the output power of clean and dust-coated photovoltaic panels is tracked and measured through transmission tower test platform. The analysis results are verified and the correction method of photovoltaic panel configuration in high-dust areas is given.