[mitiempo]

As stated above you could use the generator to power an ac charger. Best to keep the charger to about 35% of the generators output for the most efficient charging though. Some chargers don't get along that well with the waveform produced by many generators and will produce a lower amperage when the generator is producing near its max output.

But why go sailing to listen to a generator if you don't have to. With LED lighting and careful management, especially if you don't have any refrigeration or electronics like radar using power, a solar panel or two as mentioned above can supply all you need.