If you keep your boat docked on a lake - say if you went on vacation and kept your boat in harbor. What are the options to charge your boats batteries. what are the alternatives to charging batteries- especially ones in the bow.

On board charger,,,,,,,,,,,,,,, but that'll only work if you have power available at the dock! Otherwise, pull the batteries, carry them to camp/lodge etc and charge them with a portable charger! Or,,,,,,,,,,,,,, take along a small portable generator and use on board charger or portable charger!

You either have electricity available within extension cord length on the docks or you trailer your boat to where there is. There are devices that would allow your outboard to direct resources for charging other batteries as well if that is your intention.

If you are just trying to charge them or keep them charged while you are gone go buy a small solar panel that has alligator clips on it. Connect the clips before you leave and your batteries will be charged when you return.

I have a houseboat that gets pulled out over the winter. It sits from October until April. I leave all the batteries (5 in all) in the boat and connect a small trickle charger to each. Just enough juice to keep them from freezing and won't overcharge them. Ready to roll in the spring and I don't have to haul heavy a s s batteries around.

Without power nearby your best bet is to rent a small portable 1000W generator, a Honda or Yamaha. Both are very quiet.