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In order to solve the electricity problem of residents in the single-family villa, while for the effective use of solar and wind energy, the paper give a run analysis of wind solar hybrid power generation system in villa, which is utilized to replace the using of electricity from state grid. The results showed that the off-grid wind solar hybrid power system can save grid power and reduce emission. It is convenient and reliable for individual users in electricity using. There is a project called "Lishui Lanting" in Anyang, Henan, the energy-saving rate and payback period are calculated. The results show that the energy efficiency of the system is significant and the system should be used in North China.