As I have a fair amount of equipment running I opted to install a house battery (grp 24 deep cycle) and a charging relay. This keeps the cranking battery isolated during dischage from all the accessories.
When I fire up the motor, it charges both the cranking and house. My on-board smart charger does the same when I plug it in.
If you need more info on this setup, please send me a PM.
Cheers!