T&T: Battery Charging Questions

[John Wix]

My battery temp problem seems to exist only on one battery post - the 
negative post in one pair that is wired to the negative post in the other 
pair.  All other battery posts measure 20 to 30 degress less.  Is this 
expected?

An infrared thermometer pointed at the battery cases also reads 20 to 30 
less than the one negative post in question.  My next step is to swap the 
hot post battery with another one and see if the high temp moves or stays in 
the same position.  Stay tuned.

John Wix
Monk 36
"Safe Return"


>Sorry I've gotta disagree with your charge rate figure. T-105s are rated at 
>220 AH so with 4 in >series parallel john has a 440AH bank. So if you use 
>20% (I use 25%) with your calcs it would be >88 amps. Balmar batt temp 
>sensors trip at 125 deg F. It's hard to keep engine room temps below >that 
>in the South when the house banks are in the engine room. A seperate 
>battery room would >be great but not practical on smaller boats. I have 
>checked temps on Rollsdoc and they run at >125 deg. So I have disconnected 
>the temp sensor for the large fram alternator that charges the >house bank 
>while underway. Batts are 125 deg anyway. Did this several years ago and no 
> >problem yet. Even talked to Balmar about this and my battery supplier. 
>Works for me.

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