House battery problem - is it me or Interstate?

With a genset that would be a good thing for a 100 amp hour battery. Some boondockers are using 12 cells 3-parallel, golf car batteries. Using normal hotel loads plus a heater's fan overnight, it seems campgrounds are literally symphonies of generator hum from dawn to dusk. 60db isn't much until it is multiplied by a dozen.

Forty amps initial charge rate per 100-amp hour capacity is a good formula for genset recharging.