Warm today, 45F, sitting a couple days, 12.44V. Started and dropped to 10.16V on cranking, but sat at 11.4V(?) while idling. Goosed the throttle, that got voltage up to 12.4, but then it would drop. The engine sounded like it was working hard when it tried to cycle the alternator? but it could not get to 14V. It would try to raise the voltage, idle would drop, then it'd give up. Rev'd it a couple of times, like 3k+, and it finally decided to do its job and sit at 14.6V.
Did not think to turn the lights on. Was on defrost and despite a cold engine, it did elect to turn the cooling fan on at one point? I turned the HVAC fan off and that turned the cooling fan off. Probably correct operation, just odd.