Originally Posted by CoachPJG
My coach is brand new, it just rolled out of the factory in January. I checked my batteries before I turned on the fridge and it was reading 2/3 charge. I thought that would be enough for two days, but I still ran the genorator for a cushion. I guess it was not enough. I was a little worried about plugging in to a house outlet. I guess if I don't run the A/C or heater I should be ok to plug into my garage?
By all means yes, use your garage A/C . Just make sure the water heater is off or breaker open on electric. That pulls probably 12-14 amps by itself. As you mentioned with minimual loads, converter, some lights and alarms you'll probably draw no more than 6-8 amps. Of course that will include the fridge for a few more amps, plenty of room on a 15 amp circuit. I've done it for years in various coaches. The converter running this way will charge the batteries in 1-2 days or less depending on their condition. As Herk says the 2/3 charge really means in on the downside and fast. Better to go by voltage or hydrometer of acid level. The "gauge" really should be used to confirm "charging", not condition. Have fun this year, we got a good start, just finished 3 months in FL, great weather. Next year you should consider a trickle charge or periodic charging of your battery. Left in cold for months can only shorten its life dramatically.