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Originally Posted by Cakewalk
It depends how they would have the diesels hooked up to the generators. If the diesel shafts simply ran through the electric motors and turned them while the diesels were running, then there would be no loss in effeciency.
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Oh yes, there would be. If you withdraw energy on one side of the system (to charge batteries for example) you must put (at least) the same amount of energy into the system on the other side.