TRANSPORT REFRIGERATION SYSTEM AND METHOD OF OPERATING IT

A transport refrigeration system (200) including: a transportation refrigeration unit (22) configured to provide conditioned air to a refrigerated cargo space (119); an energy storage device (350) configured to store DC electrical energy to power the transportation refrigeration unit (22); and a DC-to-AC variable invertor (370) electrically connecting the energy storage device (350) to the transportation refrigeration unit (22), the DC-to-AC variable invertor (370) being configured to convert the DC electrical energy from the energy storage device (350) to AC electrical energy in a variable continuous energy output to power the transportation refrigeration unit (22).