2021 E450 dual alternator
Does anyone have this package, or can anyone help with parts? Specifically with the gas 7.3L. My RV has the single 210 amp alternator, and I’d like to upgrade to a 240/157a dual alternator setup...
Forum Discussion
pnichols wrote:
Large and reliable alternators will probably become more important as lithium coach batteries become more common in motorhomes. Supposedly lithium battery banks charge fast - but only if one has a charging method that can deliver the high currents that the batteries will accept. For dry camping - especially when many hours of enough solar aren't available - a large capacity alternator driven by an idling chassis engine might be very useful.
First, I would not want to try a put more than 100A into ANY battery for more than a few seconds. Bad things can happen and at that rate they will happen fast !
Second, you really should have a multi-stage charger to do the job properly !
Third, no automotive alternator is going to put out more than 13V "are idle". Typically it takes 1500-2000 RPM to get 14V. Buy a DC-DC charger.
I think that emergency service vehicles often have dual alternators.
And that is the only reason why someone would purchase a vehicle with 2 alternators !
