Abstract: The representative power system of aerocraft was introduced.All kinds of parameters，which impacted production of soalr energy, were analyzed.The method of calculating solar energy on the aerocraft was provided,which included from the power to the area of the solar array and from area of the solar array to the producing power.The effect of accurately calculating solar energy was achieved.The problem,which the power parameters for the aerocraft were difficult to realize due to error of estimate in macro loop design,was solved.

Key words: Solar energy, Calculation method, Power system of aerocraft