I'll keep digging to find the exact specs, I have a 2020 Ram ProMaster 2500 with the stock 180 amp alternator.
I also have a clamp meter on the way to do some tests at home. Looking at comparable 160-190 amp alternators there should be 100+ amps available, plus I'll have a manual switch to only activate DC-DC charging on highways.
System wise, I'm looking at the following:
Victron SmartSolar MPPT 100/50
Victron Multiplus 3000W 12V Inverter/charger
4x 150W solar panels
4x 100Ah 12V LiFePO4 (DIY) batteries OR 2x 190Ah 12V LiFePO4 (DIY) batteries (wired in parallel - ensuring combined BMS amperage suitable for 3000W inverter)
Victron BMV-712 battery monitor
Sterling 60amp 12V DC-DC charger
The solar can produce 50 amps and the DC-DC 60 amps, so 110 amps together (assuming 100% efficiency to be safe).
As for loads, we have kids so our use will be heavier than most, thus the big battery bank and inverter. I plan to have a 1400W electric water heater and 1800W bench top convection oven. Water heater possibly used 1hr every couple of days and the convection over maybe 20 minutes every couple of days. Otherwise we both have laptops for work and the usual small electronics (phones etc).