Battery/Charger Question(s)

Sanssouci

New Member
Sep 2, 2013
14
Canyon Lake, Texas
Boat Info
310 DA
Engines
5.7 Mercruiser w/ Bravo III
Good Afternoon,

I acquired my 2001 310 Sundancer almost 4 years ago. I've been fortunate that I haven't had many maintenance issues, and until now, no electrical issues. I think my current issue is simply a dead battery, but I thought I would solicit thoughts and advice from the forum to ensure my charger has not gone bad.

Last week, the Captain decided to stay over on the boat for several days. The boat was docked and on shore power. On her last day, she noticed the cabin lights were flickering most of the day, then went off completely. I went to the boat over the weekend and discovered the battery was dead. I started the engines (had to use the emergency start for the starboard engine) and ran them for a half hour or so. The battery built up a charge, and the cabin lights (and other systems power off the batteries) resumed working. I shut off the motors, and the DC meter on my control panel showed I had a little less than 12v. I checked my xantrex Truecharge2 charger, and it indicated it was in charge mode.

I returned to the boat 2 days later, and the battery was dead again (I shut off the master quest switches prior to leaving).

The battery seemed to take a charge off the motor, and the battery charger indicator lights indicate that the charger was operating properly. The batteries are Exide AGMs. Am I safe in assuming that it is probably a dead battery that simply isn't taking a deep charge? If I am not getting any fault warnings on the charger, am I safe in assuming it isn't the problem (IOW, has anyone had any trouble with the xantax Truecharge2)? Appreciate any insight.

Thanks.

Ron
 
Also, assuming it is the battery, should I replace both of them, and does anyone have any recommendations on brand? Thanks.
 
Running the engines for a half hour (or so) at idle speed is not going to fully charge your batteries. You could also have a bad charger or bad fuse/breaker as mentioned.
 
When the battery charger is on, put a volt meter on your batteries. You should see something like 13.1V to 14.4 volts depending on the settings on your charger.
 

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