Diesels idle pretty efficiently whereas jet turbines have very high minimum amounts of power. In terms of efficiency losses between the turbine, generator, bat

Diesels idle pretty efficiently whereas jet turbines have very high minimum amounts of power. In terms of efficiency losses between the turbine, generator, battery, and motor - no, not really; look at most modern hybrid cars. Lithium ion battery coulombic efficiency is in the high 90's percentage-wise, by the way. I would imagine that we might see hybrid turbine locomotives as battery power density and cost continue to improve.