For the inconsistency of efficiency characteristic curve of the inverter module, using the average control strategy cannot achieve the optimal efficiency. A novel method of the power allocation strategy was proposed in this paper. The genetic algorithm and the least squares method are combined to calculate the power allocation of inverter modules in the proposed method. Compared with the traditional average power allocation method, the proposed method improves the efficiency of the circulation load. Firstly, simulation results prove its validation. Secondly, an off-board charger measuring system with the circulation load was built. The proposed method and the traditional method are verified separately and compared in the off-board charger measuring system. The experiment results prove the proposed method of the genetic algorithm method and least squares has better efficiency than the average power allocation method. The method possesses the practical value for off-board charger modules、inverter cluster and off-board charger circulation load working.
