Posts: 1
Threads: 1
Joined: Nov 2020
Reputation:
0
Home Port: Southport, NC
Vessel Info: 3100, yr2000, twin 7.4L.
Lost dockpower AC 90 days ago with storm surge. Batteries charge with alternators while running.
Only house batteries draw down over night, dramatically. Even when I switch the house batteries to off on panel Under the steps?
Thoughts ?
Posts: 229
Threads: 45
Joined: Dec 2016
Reputation:
2
Home Port: Long Island Sound
Vessel Info: 3100 Open, 2002 Model Year, 8.1L Crusaders
Have you load tested the batteries? How old are they? The only things that should be wired directly to the batteries are the bilge pumps. If your battery switches are off and your batteries are going from 12 to 9 volts over night I would start with checking the batteries. Also, if you have the same Balmar Alternators that I do just running the motors at idle at the dock will not charge your batteries. Need to be above 1000 RPM.
Posts: 163
Threads: 12
Joined: Dec 2016
Reputation:
0
Home Port: South haven,mi
Vessel Info: 2006 3200 0pen 8.1 crusaders
co detectors are probably hard wired also.
Posts: 481
Threads: 8
Joined: Apr 2018
Reputation:
10
Home Port: Port Canaveral, FL
Vessel Info: 2003 Tiara 50 Open
3406E Cats
Sounds like you have a bad battery or two. One bad battery will pull the others down with it.
