Ron ..... thanks much for the link above.
I'm a bit familiar with aftermarket alternators and have been disappointed with their reliability. It seems that what OEMs put in their vehicles, stock, always last a lot longer - that's a mystery to me as to why. The alternators in your link above - believe it or not - seem way too inexpensive to be reliable. I once retrofitted my 4X4 PU with a high capacity alternator from an offroad equipment supplier in Southern CA and it lasted for many years - but I paid almost twice those prices showing in your link ... and that was way back when money was worth something.
What I would trust and want most in our RV would be what alternators that Ford regularly installs in their truck chassis - just two of them for both high current delivery when needed, and redundancy for ultimate reliability. Actually - if they would have been available on an E450 cutaway at the time and had I custom ordered our motorhome from Winnebago - I would have had them build it on an E450 cutaway chassis with selected parts of these packages on it:
https://www.fleet.ford.com/resources/ford/general/pdf/brochures/Ambulance2014_LoRes.pdf
