running generator to charge battery to drive the wheels is somehow better than just driving wheels directly
In some ways it is, yes. The engine design is not the same, it doesn't need gearbox, variable power output etc to charge battery. In some ways it can be more efficient.
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In some ways it is, yes. The engine design is not the same, it doesn't need gearbox, variable power output etc to charge battery. In some ways it can be more efficient.
The Prius isn't really using a gearbox in the conventional sense either, it's much simpler.