It's possible. This appears to me as a generating device that uses Superconductor theory, which has been the object of the most interesting and the absolute best method of power generation that we could ever use!
The story doesn't really explain enough about this device, so I am unclear to how they generate the power.
The story hints towards Superconductive theory, where it states some facts towards the magnets used. That's where I can see superconductor action - at the Electromagnets.
If this device doesn't use a superconductive principle, I have no clue if it would produce any more power than what is needed to keep the generator running [that's possible with any generator to a limit].
When the story said "The generator just needs to be Kick Started from a Battery", this sure is going in the superconductor direction!
That's how one would get that type of motor generator started. Once it's running at full speed, the Battery could be disconnected and the motor will continue to turn the generator.
Connect the Battery once again to the motor, and you can power external loads from the generator. When a steady load is connected, the Battery could once again be disconnected and the motor will continue to drive the generator - producing the power that runs the motor and the power in the external load.
Battery does not need to be disconnected, and really should remain connected, in order to supply the temporary level of charge needed when a load varies. Other than that, the Battery will not have a draw from it, and may be charged back to capacity.
The theory behind all of this is not easy to achieve at temperatures above absolute zero [0 degrees Kelvin, or -450 degrees F].
The need to discover/invent a room temperature superconductor is the only thing holding this theory back!!
If possible to achieve room temperature superconductivity, there would be no resistance to the current flow within a circuit - this would include the generating device, the conductors and the load. Electrons would flow in a straight line, one behind the other, throughout the entire circuit. This would make the current flow non stop once it got started, so it only needs to be temporarily "Jump Started", then flows by it's self without continuous input energy.
Kind of like an Electron syphoning hose
Normal current bounces all around in the generating device's coils, in the conductor and in the load - due to the Electrons hitting impurities. When this happens, they lose energy to the impurity and need energy to place them back in order.
This keeps the current flow below light speed [300,000 KM/second]. This also keeps the current from flowing in a straight line and working like a "syphon hose"