qwest

Is there a dual alternator option available for the cummins?

nitrousn

That would be a very tight squeeze. With the high output that they already have plus you can get a bigger one that bolts on why would you need 2 ??????

qwest

I run 3 Truck Camper battery's, wired to the main system with a relay.

The water tends to boil out of the TC batterys( overcharge )
Never had this problem before the dodge PCM controlled
Alternator, I think the PCM can't tell the batteries are charged with the extra load, Plus, don't like the idea of a pcm controlling the alt., would like to seperate PCM and other electronics problems from the Camper system.

Note: I do have some other flacky electrical indications
when I switch the TC Batteries on, I think it's voltage spikes, Don't need a VP44 problem out in the woods....

nitrousn

I would hook a voltmeter into the campers batteries and watch the voltage. The trucks system charges 2 batteries without a problem. Do you run an isolator? If the alternator was to overcharge the campers batteries it would also have to overcharge the trucks batteries. What ever level of alternator fielding the pcm chooses goes to all batteries at the same voltage level.

qwest

Voltage looks normal, My concern is the Dodge batteries are Big Mothers , which probably have different impedance
than the camper Deep cycle,

I'm guessing the Truck batteries can handle higher Voltage
Than the Deep cycles. That is they are not fully charged
while the Camper batteries are Over charging.

Anyway, Would like to get seperate charge systems for
other reasons mentioned...

Thanks for the Help, will keep working on this.

Have to install my digital voltmeter ( like other trucks
I've had ) I wire all the batteries ( tapped in the battery )
to a rotary sw and read the Voltage of each battery..

Haulin_in_Dixie

So put a regulator on the truck and eliminate the pcm from it. Go to optima batteries for all five, they charge up to 15 volts with no problem. You would be well off to use an isolator in any case. Amperage on your alternator is not the problem, 135 will handle your batteries and then some, durability is a different case.