Originally Posted by cherinscoop
Should engine and coach batteries be charging at the same time on the alternator?
To answer your question .. I would hope so, that is normal operation..
Now to the O/P. There are several things that cause an alternator to run hot.. It may be in a location that is too hot, ducting fresh air over it may cool it off some.
Or it may be a bit ..er.. anemic,,, Using a LARGER alternator may help.
And some folks like to use an inverter to power a home type fridge (or even an RV absorption type) This is not the best idea in the book.