I run dual Victron Orion 12/24 smart chargers in my van. Even in a 12 volt system, you need dc to dc chargers so it is not an added cost. My dual Orions output 850 watts of charging even at idle.@SteveCA - I agree with you 100%. The only drawback for me for 24V build - is the lack of efficient charging 24v from my vehicle alternator. I live and mostly travel in the geographical region where sun may not be there for weeks during the fall to spring for sufficient solar recharge. Boondocking mostly in remote areas without being able to recharge from a grid, leaves me not much choice. Anyway, I already obtain all the 12v equipment for my build, its already here. Thanks for the input anyway.