Question then becomes : which of the following has a higher penalty ? The aero drag with shutters half-open or the increased electrical load to power the Rad Fan at low speed ?
Considering the vehicle has no alternator, the engine load might not change much given that the Hybrid DC-DC converter ultimately provides the power through the small 12V battery...
Soon enough, with colder temperatures, the coolant will probably not reach 95-96C.
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