I have heard two opposing opinions on the matter of powering electric fans (independently fused and relayed of course) off the alternator. Some people say it is fine, others say to avoid it. My battery and solenoid are in the trunk, and there are no other available ~30amp connections available without running a dedicated cable up from the distribution block in the trunk. If I have a 1-wire internally regulated alternator running to a megafuse and 10ga cable going all the way back to the battery, is there any harm in running the fans off that? The only downside is that the power isn't "conditioned" through the battery in this case.
I'm upgrading the cooling from a single pusher fan to a dual puller and shroud. Total draw is only 22amps when running but it will spike higher on initial startup as expected.