Symmetric dual axis tracking system， one of the major products of our company ，can entirely eliminate the stent eccentricity because of the design of the  zigzag symmetric structure which is of no eccentricity. It can also save the energy consumption of the bracket when running in the shortest torque to compel the revolving and enhance the resistance capacity of wind and strengthen the strength of the support meanwhile. Its generating capacity can be increased by 30% to 35% in this technique compared with that of the stationary type.