Q: Charging a batt bank w/ alternator & mixing batteries

Thanks a bunch guys, extremely helpful. I suppose I'll either need a new alternator, an extension cord to charge my batteries, or a solar panel. I wonder if I could charge up at those EV stations..

I like the idea of the truck charging the battery bank because it seems the setup would be efficient and cheap. I also live in the pacific northwest where we don't get much sunlight half of the year. Would a high output alternator get the job done? I think I'll need one anyway for my subwoofers.