Sorry Ross, missed that part in your opening thread. Agree 100% with John, a 24 to 12v DC to DC charger is a far better idea than a 12v alternator. This also gives you the flexibility to later change to a different battery chemistry if you decide to go that way as a DC to DC charger is much easier to control than a second alternator. My advice would be 12v house and 24v truck and power anything 12v in the dash from the house batteries, far less complication and potential failure points that way.I have 12 and 24 voltage requirements for lighting, radio, GPS, electric stairs, and a few other things and was considering
an additional deep cycle 12 volt battery charged by a 12 volt alternator added to the engine.
Is this practical, or is there a better way.
T1 Terry