Engineless transport refrigeration unit

A tractor trailer system including a self-propelled tractor including a combustion engine and a generator driven by the combustion engine, including a transport container adapted to be connected and towed by the self-propelled tractor, and the tractor trailer system further comprising:

• an engineless transport refrigeration unit mounted on the transport container, the engineless transport refrigeration unit comprising a compressor constructed and arranged to compress a refrigerant, a direct current compressor motor configured to drive the compressor, a condenser heat exchanger operatively coupled to the compressor, a condenser fan configured to provide air flow over the condenser heat exchanger, a condenser fan motor for driving the condenser fan, an evaporator heat exchanger operatively coupled to the compressor, an evaporator fan configured to provide air flow over the evaporator heat exchanger, an evaporator fan motor for driving the evaporator fan, and an energy storage device configured to provide direct current electric power to the compressor motor, condenser and evaporator fan motors, and wherein the energy storage device is configured to provide power within a range of two hundred volts to six hundred volts and to be recharged by the generator, and wherein the compressor motor is configured to operate at a direct current voltage range of two hundred to six hundred volts.