Unless you have an external 3 stage regulator, the alternators are designed to handle the load and moderately recharge the batteries. Would ask an alternator repair facility to trouble shoot the alternator. If the regulator became faulty, it may have had the alternator running at too high an amperage output which over heated it.
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters