JohnT, I'm no expert, just a Bubba. However, I had an old caddy with a 61 amp alternator. After frying 3 alternators in a row, Auto replaced them free, I discovered my problem. The seat belt release never shut off. After 3 days the battery was so low, that when I got going about 60 you could smell the alternator, fried.
So, yes I would be concerned. I read the instructions that came with the GM alternator. It said NEVER connect new alternator to a dead battery, charge it first.
I have my IH C rigged up to pull my dump trailer. It's the only thing that has enough traction to pull a 10k load up a steep incline, out of the gravel pit. The dump trailer has a heavy duty battery, measured it at 1000 cca. I ran a heavy wire from tractor battery to the trailer battery and fused it with 20 amps. I watch my ammeter on tractor. When dumping trailer, I slow the tractor to an idle and amp guage goes to 15 amps. Would go higher if it were it running faster.
I would installed an ammeter to see how much the RV batteries are being charged. I may even have a fuse or circuit breaker installed to keep amps safe. I would also have a voltmeter on RV batteries.
Go to tractor talk and look at my post Bubba wants to be an electrical engineer. I posted it to show people how to make a very simple diode checker. Only one person got it.
I would install one or two of my large diodes with a heat sink in series. Each diode will drop about .6-.7volts. That way when you start out driving, the diodes would act as a resistor, reducing the voltage applied to your RV batteries by .6v for each diode. Less volts = less charging amps. I would also keep an eye on ammeter and voltmeter on RV batteries. When the batteries come up I would have a relay short a diode, by bassing the diode. That should then up the charging amps. At some point, I would remove all diodes by using a relay in parallel with diode.
Hope this works, don't see why it wouldn't.
Definately fuse the circuit and protect your alternator.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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