Been reading all the electrical
threads with interest. Planning upgrades to my setup.
Yesterday I noticed the Guest 5/5 dual battery charger
was not in float even though I've been at the dock
for weeks. Not using much DC so I was suspicious. Checking the analog volt meter next to my DC breaker panel showed one battery
to be a volt less than the other.
Knowing something was amiss, I grabbed a flashlight and found one battery to be warm and the other cold. Further inspection
showed the two melted spots pictured below.
Looks like it melted from the inside out. Looks like it could be the location of the connection lugs for that cell. Does that make sense? Did a cell short out?
Batteries are Sea Volt from West Marine
, group 31 105 amp hour each. Date code wasn't punched out, but the case sticker says A7 on both, so could have been made in Jan'07, I'm guessing.
The batteries are in a wooden case with a plastic lid. Notice the proximity to the nylon strap. The strap was stuck to one of the holes where it protrudes the most. I can't believe that had anything to do with it.
From my reading here, everything is wrong with my setup. I recently upgraded to a 80 amp Hitachi, but:
-it's internally regulated
-the charge wire still goes to the starter.
batteries with a Guest 5/5 charger
made for flooded or gel (just read this last night) and only 10 amps.
-batteries on a 1-all-2-off Perko switch, 2 banks of 1 battery each, no start battery or echo charge.
I've started making a wiring
diagram for the boat and intend to make some changes as funds permit
For now I've isolated the bad battery and will use only one. I have a spare battery for the dink trolling motor
that's good to go. So I can still go for a sail overnight and have a backup start battery. Obviously need to get things better sorted out before my next extended trip, not sure when that will be.
Any advice or discussion of how best to upgrade my system would be appreciated. With the caveat that I can't throw huge sums of wallet shrapnel at the issue immediately, but over time can get there.