How to burn out your alternator while direct charging LiFePo4

[TWIH]

I have a serp belt & good fan on the Ambo so I'm good but didn't let it idle to charge & now check the master. I draw 13 amps to run at 70mph.

This is a comment from the article posted Lucian Popescu  tkteun • a month ago
Normally yes but we were talking about idle. There are special vehicles used stationary, having high power demand (ambulances, police cars etc)

I’d think that one of the advantages of an econoline van is that you could get a large case police/ambulance alternator to replace the small case (assuming clearances fit), since Ford did engineer those for hd usage.

Question 1, if you are concerned about idling, would it be better (or reasonable) to just use the simple on/off 1/2/combined switch instead of a cd solenoid? That way you’d have more control over when the alternator was trying to charge the depleted house bank. You could then avoid the idling issue altogether.
Question 2, If you are driving on the highway and then switch the dial to the house bank, will that sudden surge/demand do bad things to your belt?

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