theoldwizard1 wrote:

Curious. Why do you think you need dual alternators ?

pnichols wrote:

Let me chime in here with some thoughts:

1. 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.

2. Since any vehicle's alternator is very important, having two on board - when one or the other is getting used a lot for high current lithium coach battery charging year after year - to me would be a necessity for equipment backup purposes should one or the other fail when drycamping. Always have a Plan B for critical Plan A failures!

P.S. I think that emergency service vehicles often have dual alternators.

brianjw wrote:

It was the Ford dealer parts dept, they’ve historically been awful.

I’m not concerned about warranty, the second alternator wouldn’t be integrated into factory electronics at all. I’ve modified everything I’ve ever owned.

I’m going to run a 400 amp hour lithium battery setup. I want to be able to run the roof top AC off of the Victron inverter while driving (or just quickly recharge the batteries while driving). The plan is to run a 60 amp sterling B2B charger off of each alternator, for a combined 120 amps to the lithium battery bank. I don’t want to overwork/overheat a smaller single alternator asking too much from it, and this seems like the safest way to do it. A little overkill, sure. No, I don’t want to have to rely on the generator while I’m driving. In fact if the solar and alternator perform well enough the generator will come out.