Rawsun four-in-one auxiliary power controller is an integrated controller specially designed for electric vehicles. It is suitable for 6~ 12m full electric buses/trucks. The controller is integrated with DCDC, steering pump motor controller, air pump motor controller, and high-voltage power distribution.Compared with the single-machine version of the controller, it has the advantages of small installation size, simple circuit design, less wiring harness cost and low after-sales maintenance cost, rich load and control interface, and can be customized for different needs.The whole controller adopts cast aluminum die design, high protection level;Modular design, easy maintenance.