Getting to that magic 14.8 v with an RV Charge Controller

Or, a person can get smart, check into a hotel and wait for the lights to go out (down here).

This forum has what, three or four factions? Some members of each faction insist the idol they pray to is the right one and all others are blasphemy. Sound familiar?

Give battery maintenence your best shot. There are alternative methods available
But as one of my heros Albert Einstein quoted "Insanity can be defined by doing something over and over exactly the same way and expecting different results".