I've got a house bank that is 6 deep cycle 6 volt batteries. They're wired together to produce a 12 volt house bank.
I've got 2 alternators on my Perkins
The other day we spent the night on the hook and everything looked good on the house battery
bank in the morning. Barely touched. The start battery
and the windless battery fully charged. Motored about 30 minutes to where we anchored for the day for a regatta
. (Committee boat so we didn't get to put up the sails)
I get ready to start the diesel
to leave where we were anchored and my house bank was almost dead. Got the motor
started but opted to motor
all the way back.
At the slip I top off the fluid levels just to be sure and turn on the charger
(xantrex true charge 2) It took about 36 hours to get the house bank back to fully charged. On friday I turned off the 120 and left the boat on the house bank for about 3 hours. There was no noticable drop in the charge level of the batteries. The next day I start the motor and hear a loud whining coming from the alternators. I shut the motor down and while checking the alternators check my house bank. Almost dead!
What the heck? I've pulled the alternators and will have them tested but my question is.... Is it possible for a bad alternator
to drain such a large house bank in such a short time? OR am I going to discover my alternators are good and are whining because of a load placed on them? Weird huh?
I'll report back in a day or two once the alternators are tested but it was such a weird occurance that I just had to post it here. There's no sign of anything overheating
. I'm not seeing anything that is shorting out and the house bank recharges when I turn the charger
bank on. So, what am I looking for?