Kingclima can offer the independent diesel semi-trailer reefer units with electric standby system AC380V or AC460V ,three phase 60HZ .This trailer refrigeration unit has its own independent 404D-22 Perkins engine,generator and Bitzer 6TFRY compressor can make minimum Temperature Of Container: -30℃ and Cooling Capacity: 0℃/19900w -20℃/10900w