A generator assembly for mounting to a container. The generator assembly includes a container frame having a top casting and a receiver bracket. The generator assembly includes a frame, a generator coupled to the frame, a clamp mounting system including a first clamp coupled to the frame and configured to be coupled to the top casting, and a pin mounting system including a first bracket coupled to the frame and configured to be coupled to the receiver bracket. The generator assembly is such that one of the first clamp and the first bracket is repositionable on the frame to avoid interference with the container when the other of the first clamp and the first bracket is coupled to the corresponding one of the top casting and the receiver bracket.