The main reason I would consider changing over to lower-draw electrical systems is for using Engine-Off Coasting. It will extend the life of the charge in the battery if the electrical bits are using less power.
IMHO, any gains from not having to generate as much power in the first place are going to be rather small.
I figure I need to work on "tightening the loose nut behind the wheel" before doing the electrical mods.
-soD
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