I would strongly recommend ultimately going with a three bank charger system. Good ones will automatically transfer their output to where it's needed most, starter or trolling batteries. But I don't leave mine plugged in all the time when home. That might be okay if you are fishing multiple times a week, or even every week. But I just don't think it is a good idea to keep the unit energized all the time if you are not using the rig on a regular basis. I typically plug mine in a couple of days before I plan to fish, fully recharge when I return, then disconnect until a couple of days before the next trip.

Tnfisher