Join Date: Mar 2001
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Rep Power: 15
Battery State of Charge
Went to visit the boat last weekend and found that the house bank (3 3-year-old group 27s) was at 11.4v. The starting battery is at 12.4v. This degree of difference doesn't sound right to me. The only thing connected to the house bank is the HeartLink monitor. I did listen to a bit of radio the last time I was aboard winterizing, but that shouldnt draw much from as large a bank as that, should it?
In prior years, I would visit once/month and connect a 100' extension cord to my onboard charger. When I would visit next, I'd find it unplugged, but clearly only after the bank had come up to charge. This year, I'm more than twice as far from power. I'd have to use at least two cords, and I'm fairly certain one would "walk" if left unattended (the one not attached to the boat). At what point of discharge do I have to start to worry that it might freeze, thus prompt a recharge visit?