Am I Killing My Batteries?

Sep 2, 2009
339
Hunter Vision-32 New Hamburg, NY
I've got 4 6 volt golf cart batteries. I just installed a Victron battery MONITOR. I have been leaving the battery charger (Xantrex TrueCharge II) turned on when I have shore power.

The alarm has gone off a couple of times showing that the voltage on the battery bank is in the high 14 volt range, and even getting into low 15s.

Am I cooking my batteries? Should I have the charger on only when the SOC reaches a certain voltage ? Is there something else going on?

THANKS
 
Last edited:
Dec 19, 2006
5,832
Hunter 36 Punta Gorda
Are they boiling or is there any gas smell and if so you may have a problem
for sure.
When my 4 D's went bad they were constantly charging and giving off gas smells,
but wait and see what the battery experts say here and what help they offer.
Nick
 
Jan 4, 2010
1,037
Farr 30 San Francisco
I think that might be some kind of equalization phase. Might want to read the manual.
Here is what Trojan battery has to say

http://www.trojanbattery.com/BatteryMaintenance/Equalizing.aspx

They suggest initiating and terminating equalization based on cell level specific gravity. That is more than a "smart" or even a "freaking genius" charger can do. That said it may not be quite as bad as it looks at first as it represents a phase of normal operation.

As always hope that MS weighs in, and then ignore anything I said that contradicts.
 
Nov 6, 2006
10,212
Hunter 34 Mandeville Louisiana
IF the new battery is a Victron Gel, AGM, or LiPo , it shouldn't be combined with lead acid (golf cart) batteries on the same charger unless you can set each bank to a specific type battery on the charger. I am not familiar with the Trueccharge II, but your owner's literature for that charger will show whether it can be set so that the lead acid batteries are charged to a different charging profile than the Victron.
 
Feb 6, 1998
11,759
Canadian Sailcraft 36T Casco Bay, ME
Ron,

We need more information?

What are the charger settings?
Any other charge sources?
Is there a temp sensor connected?
What are the battery temps when you see this happening?
What does the battery monitor show in historical data for max voltages?
Ideally your charger would stay in float when you are not there except if it occasionally reverts to absorption charging.
Make sure it is NOT set to Lead Calcium!!
 
Sep 2, 2009
339
Hunter Vision-32 New Hamburg, NY
Ron,

We need more information?

What are the charger settings?------ Xantrex TrueCharge II is set for 3 Stage / Flooded / Warm
Any other charge sources? ------ No other charging sources - this happens only from shore power to charger
Is there a temp sensor connected? ----- I do not have a temp sensor connected yet (I have one that has not yet been installed

What are the battery temps when you see this happening? ------ battery is probably in the 40 to 50 degreee fahrenheit range ---- (maybe this is the problem since the Xantrex is set to "WARM" ????)

What does the battery monitor show in historical data for max voltages? ----- H8 (maximum battery voltage) shows 15.17

Ideally your charger would stay in float when you are not there except if it occasionally reverts to absorption charging.
Make sure it is NOT set to Lead Calcium!! ---- definitely set to flooded
THANK YOU RC!
 
May 11, 2005
3,431
Seidelman S37 Slidell, La.
I am in agreement with kloudie. You cannot mix the battery types, as the charge voltage is different. I have 4 6v golf carts as a house bank, and a single group 31 as start. A guest charger that stays on when ever I have shore power, which is pretty constant. No problems.
 
Sep 2, 2009
339
Hunter Vision-32 New Hamburg, NY
I am in agreement with kloudie. You cannot mix the battery types, as the charge voltage is different. I have 4 6v golf carts as a house bank, and a single group 31 as start. A guest charger that stays on when ever I have shore power, which is pretty constant. No problems.
I am not mixing battery types ... have only 4 golf cart batteries.
 
Sep 29, 2008
1,976
Catalina 310 #185 Quantico
So did you mean to write you have a Victron Battery Monitor?
 
Apr 30, 2015
18
36 Sloop 36 Chesapeak Bay
Check for the right set point. We had a Xantrax charger fail berserk and kill our entire set of batteries. It was charging at more than sixteen volts and it also damaged the interior of the boat from the acid. We did not use another Xantrax my bride made that clear.
 
May 11, 2005
3,431
Seidelman S37 Slidell, La.
I have a Guest charger that has been on the boat, and doing fine for over 5 years now. Absolutely no problems.
 
Mar 15, 2013
197
Islander 32 mkll Comox Hrb.
I have an old Jefferson 155, who knows what that vintage is, and I'm very impressed with how well it's worked over the last four years.
 
Mar 15, 2013
197
Islander 32 mkll Comox Hrb.
On one of the boats I worked on there was a Xantrax, and it was terrible. When it burst into flames it was replaced with a Magna Sine 2500, and that thing has worked like a dream for six years now.
 
Nov 6, 2006
10,212
Hunter 34 Mandeville Louisiana
Ahh haa.. adding that one clarifying word, Monitor, makes a difference.. Carry On, Lad.
 
Sep 2, 2009
339
Hunter Vision-32 New Hamburg, NY
answers to MaineSail's questions ... I don't know if these were viewable in my previous reply:

- Xantrex TrueCharge II is set for 3 Stage / Flooded / Warm
- No other charging sources - this happens only from shore power to charger
- Temp sensor is now installed
- battery is probably in the 40 to 50 degreee fahrenheit range ---- (maybe this is the problem since the Xantrex is set to "WARM" ????)
- H8 (maximum battery voltage) now shows shows 14.95
- charger is set to lead acid
 
Sep 28, 2008
922
Canadian Sailcraft CS27 Victoria B.C.
The Xantrex temperature sensor should negate any cold/warm setting.
 
Jan 25, 2011
2,439
S2 11.0A Anacortes, WA
My Xanterx true charge 60 has been working fine for four yrs. only complaint is the wire connnections are puny....
 
Feb 6, 1998
11,759
Canadian Sailcraft 36T Casco Bay, ME
answers to MaineSail's questions ... I don't know if these were viewable in my previous reply:

- Xantrex TrueCharge II is set for 3 Stage / Flooded / Warm
- No other charging sources - this happens only from shore power to charger
- Temp sensor is now installed
- battery is probably in the 40 to 50 degreee fahrenheit range ---- (maybe this is the problem since the Xantrex is set to "WARM" ????)
- H8 (maximum battery voltage) now shows shows 14.95
- charger is set to lead acid
You can unplug the temp sensor. It is boosting voltages because it is cold.. Once you plug in the temp sensor the cool, warm, hot buttons no longer do anything and the temp sensor takes over..