|Posted: July 15 2008 at 17:26 | IP Logged
Roger on my 330 SE (Elegante)
Stbd engine- battery for that alone.
Port engine- battery for that alone also connected to house bank via an isolator.
This may be the source of your problem as the house and port engine batteries are connected together via an isolator. If either of these batteries is bad it can be to the detriment of the other.
Gen Set Battery - Only for the Genset.
As Ernesto noted the CO detectors are always on. They can slowly run down battery. Also make sure your sump float switch is not sticking on the strainer in the sump drain box (under 1st cabin step) as this will drain battery and burn out sump pump. Both were problems in my boat that I corrected. Check batteries with a hygrometer (checks the specific gravity of the electrolyte); replace batteries if bad. I repalced the house with a group 30 deep cycle battery which does fit in the house battery box. I replace batteries at 2-3 year intervals.
Edited by TheoMD on July 15 2008 at 17:28