On Wed, 7/20/16, sailor63109@... [amelyachtowners] <amelyachtowners@...> wrote:

Subject: [Amel Yacht Owners] Battery questions
To: amelyachtowners@...
Date: Wednesday, July 20, 2016, 3:34 PM


 









I just load tested the batteries and
found Mastervolt Gel Cell batteries.  4 out of the 12 in
the house bank have failed (see the link below).  There was
one pair that failed together, the other two are linked to
good batteries.  There wasn't a date on the batteries,
so I have no idea how old they are, but I assume they are
not original.
I also have the
Leece-Neville 175 amp alternator on the engine and there is
no external regulator, so it's undercharging the
batteries, but at least that's better than overcharging
them.  Maybe down the road I will install the external
regulator.  
I also have the Dolphin 30A
and 100A "Power First" chargers.  The 7 page
brochure I have notes Gel charging at 28.4V (boost) and
27.2V float and for wet batteries (i.e. "free") at
27.7V (boost) and 26.5V (float).  However I don't see
how you would switch the chargers from gel to wet or vice
versa.  The Xantrex Battery monitor shows the float voltage
to be 27.19V.  I have the charger turned off now, so later
I'll check the boost voltage.
Two questions for the
group:1.  Would you replace all twelve
when four have failed?2.  Is there more
information on the Dolphin "Power First" 30A and
100A chargers?  I can't find where you would select the
type of battery being charged.
DuaneWanderer
SM #477
https://groups.yahoo.com/neo/groups/amelyachtowners/files/SV%20Wanderer/BatteryLoadTest.pdf
 









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