Hello all -
I have been trying to track down a major problem with my battery
system on a sailing catamaran
. I just purchased the boat
a few months ago so it is taking some time to trace everything....!
My problem is this: my batteries
just don't stay charged and they don't ever charge past 11 (the starter batteries
- two more 8Ds hold past 12 all the time) Now the last owner made a mistake - he added 6 marine
Optima batteries to the bank of 8Ds (2 8Ds that came with the boat
originally). The Optimas were purchased 2 years ago and the 8Ds are 6 years old. The entire system had very little use (engines have 800 hours and genet 200).
All of the above happens when the power comes from shore / engine
alt / gen set.... three different sources and they never push the batteries past 11.
Now for some reason the previous owner connected up a few devices that are on all of the time. One of them is the 12V plug
and when I removed my phone
from being charged the meter jumped up last night. So I wonder if the gauge is a little off because of some items in-line? Unsure how that works to be honest.
I checked the batteries themselves and they are at 13.4 (I didn't check them individually but I did disconnect the Optimas from the 8Ds and both banks read over 13Vs). I put the ohm meter on the alt just for grins - way over 13 coming out.
The pain of it all is that the fridge can't run for even half a day and the food
goes bad. The inverter alarm
goes off at night because the power is so low. I actually saw an 8v on the voltmeter one day when I didn't charge the batteries. I assume that can't be good.
Any help would be great! Thanks for your time! _steve