A method for refurbishing a wind turbine includes terminating use of an existing uptower electrical system of the wind turbine. The method also includes installing a new uptower electrical system for the wind turbine at an uptower location of the wind turbine. Further, the method includes providing an electrical adaptor at an uptower location for connecting the new uptower electrical system with an existing downtower electrical system. Moreover, the method includes electrically connecting the electrical adaptor between the existing downtower electrical system and the new uptower electrical system.