Join Date: Feb 2010
Location: Narragansett Bay
Thanked 390 Times in 369 Posts
Rep Power: 9
Re: 110vac draining batteries... Confused
If you've shut off the air conditioning and you charger won't bring the batteries back up, it seems coincidental that you found this, by using the A/C.
How old is your house bank? You could have a single battery with a failed cell. Worth sorting out quickly, as faulty batteries are very dangerous. Corrosion in the wiring connections is always suspect for everything electrical on a boat too.
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In the harsh marine environment, something is always in need of repair. Margaritas fix everything.