Trojan T125

[medsailor1]

People with Trojan batteries what do you have your Bulk/Abs set Please?
Trojan data show 14.82v which seen high to me .
I asking because my two years old batteries have lost most of their capacity and I am starting to think the reason why is because there been over charge as there are set at 14.82v Abs voltage.
Many thanks

[GordMay]

T125s are FLA batteries.
Do you have a “smart” multi-step charger (bulk ±14.8V, absorption ±14.2V, & float etc ±13.6V), with temperature compensation (±0.0028 volt per cell for every 1°F above or below 77°F ?
Do your batteries off-gas under charge? (Yes = overcharge)

[medsailor1]

Originally Posted by GordMay

T125s are FLA batteries.
Do you have a “smart” multi-step charger (bulk ±14.8V, absorption ±14.2V, & float etc ±13.6V), with temperature compensation (±0.0028 volt per cell for every 1°F above or below 77°F ?
Do your batteries off-gas under charge? (Yes = overcharge)

Most of the charging is by MPPT off solar . Odd time we use our Gen ,
Two setting on my Victron MPPT
Absorption voltage set @18.2v
Float voltage Set @13.6v
There no bulk voltage and as I understand it Bulk/Abs is the same .
I wouldn't know if my batteries gas off under charge as there under are bed but when I water them once a month , there on float before they get watered and at that point there are bubbling .

It seen there Trojan are more trouble then what they worth .
Cheap LA batteries you fix and leave and they last much longer then the Trojan now only two years old .

[smac999]

If you are mainly solar charging. Likly they are not getting full. Which is death of batteries.

14.8 is correct

Trojans are among the best.

[NYSail]

With my t125s I set alt (mc614) at 14.8 1hr bulk, 14.7 3hr absorb and 13.5 float. Batteries now on third second season and still no issues.

Greg

[Boatguy30]

I have T105s as the 125s were too tall.
They for sure are not the batteries they used to be but I replaced 7 y/o gells in January. Glad I did may go to Lithium next or cheap Plomb bats in Fiji next year.

I do have my charging set to 14.8 but as it's mainly only solar I rarely touch on that voltage. Noticed lately one cell seems to have water/acid coming out a bit when topped up all the way. Maybe a bad omen?

[medsailor1]

Originally Posted by smac999

If you are mainly solar charging. Likly they are not getting full. Which is death of batteries.

14.8 is correct

Trojans are among the best.

Getting full charge or not at all with solar depend on how much you use them ,
what your uses is and the amount of Watts you have .
Mine reach float most days , thus I know because the current goes down to 3A and lower plus the voltage drop to 13.5v so unless some one know some thing other wise the current dropping indicate to me they on float .
What I have notice is else where Trojan have 14.7v as there Abs which is why I posted here to see what others people setting are , I started to wonder if mine have been over charged at 14.82v

[medsailor1]

Originally Posted by NYSail

With my t125s I set alt (mc614) at 14.8 1hr bulk, 14.7 3hr absorb and 13.5 float. Batteries now on third second season and still no issues.

Greg

Greg can you explain how you can use them setting please?
Surly if your charging at 14.8v on Bulk for one hour how do they get fully charge mine are on Bulk charge for most of the day before going into Abs and that don't happen every day .
Or have I miss understood your posting ?

[motion30]

Originally Posted by medsailor1

Greg can you explain how you can use them setting please?
Surly if your charging at 14.8v on Bulk for one hour how do they get fully charge mine are on Bulk charge for most of the day before going into Abs and that don't happen every day .
Or have I miss understood your posting ?

I agree it makes no sense in having a voltage limitation on bulk charging. Bulk charging by definition is taking everything your charging source can provide until your voltage reaches your absorption setting and then transforms into absorption mode....

[NYSail]

At the suggestion of Maine Sail, who I bought my 150 amp balmar alt / mc614 regulator from (best price and great customer service), he suggested the time periods. When I run my engine my batteries top off by the time it hits float. Alt is downgraded to i thing 130.

My shore power charger is a mom programmable 2005 Xantrex 40 amp...... takes longer.


Greg

[motion30]

According to Trojan on the t105s, they recommend an absorption time of 4 hours at 14.8 volts

[medsailor1]

Originally Posted by NYSail

At the suggestion of Maine Sail, who I bought my 150 amp balmar alt / mc614 regulator from (best price and great customer service), he suggested the time periods. When I run my engine my batteries top off by the time it hits float. Alt is downgraded to i thing 130.

My shore power charger is a mom programmable 2005 Xantrex 40 amp...... takes longer.


Greg

As you can see I mostly charge by solar , we full time liveaboard and when we are on the move we like to sail as much as we can ,
I hope this don't sound rude as it not ment to be,
but your Balmar alt don't really help my problem ,
All I can say is most people think they batteries are fully charge just because their reg switch off and many times I been told by people that their batteries are fully charge by 10 or 11am which can be confusing although I come to realise this is very rarely the case but cool if they think so .

My posting was mainly to find out what others have for their setting on the MPPT ,
I'm no expert other wise I wouldn't be asking the question here but I know enough to know there something wrong for my batteries to lose most of their capacity in two years .

[NYSail]

Yea just so you know I am not expert of batteries or electrical systems. I have been learning over the years reading asking questions and doing. So far the settings Maine Sail gave me work out just fine and do the job. I am also plugged in 4 days a week...... so maybe that had something to do with his times.

Greg

[NYSail]

I also have a battery monitor so I see soc usage etc.....

I was just stating what my charge profile is set as for t125s and the only way I can set the profile is with the balmar regulator.

Good luck

Greg

[medsailor1]

Originally Posted by motion30

According to Trojan on the t105s, they recommend an absorption time of 4 hours at 14.8 volts

Yes your right but then you read another of their data and they say 2.45v cell for Abs , so they really need to stop confusing people and make up their mind what it is .
If It is 14.7v that means I been over charging mine by .18v
Now how much different that would make I not sure .