The two power system into one combined one, just in order to guarantee with the power is enough to be charged in the solar battery everyday, if some day there is sunlight but without the wind energy, the solar panel charge the battery. The other way round, if some day there is wind energy but without the sunlight, the wind turbine can charge the power to the battery. When someday both wind & solar energy is enough, both can charge the battery. When the night is coming, the wind turbine is also can continue to work for supply the power to the system, so we sure the system will be popular in the coming future. 

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