Trojan T125

[medsailor1]

Originally Posted by 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

Thanks Greg

[GordMay]

Absorption voltage set @18.2v

That’s an insanely high charging voltage!
Even an ‘occasional’ equalization* charge is only 16.2V.

*Trojan only recommends equalizing (to mitigate stratification and/or sulphation), when low, or wide ranging (varying) specific gravities (>0.030) are detected, after fully charging a battery. Equalization is complete, when specific gravity values no longer rise, during the gassing stage.
You may benefit from the:
Trojan Users Guide ➥ https://www.trojanbattery.com/pdf/Tr...UsersGuide.pdf

[medsailor1]

Originally Posted by GordMay

That’s an insanely high charging voltage!
Even an ‘occasional’ equalization* charge is only 16.2V.

*Trojan only recommends equalizing (to mitigate stratification and/or sulphation), when low, or wide ranging (varying) specific gravities (>0.030) are detected, after fully charging a battery. Equalization is complete, when specific gravity values no longer rise, during the gassing stage.
You may benefit from the:
Trojan Users Guide ➥ https://www.trojanbattery.com/pdf/Tr...UsersGuide.pdf

18.2v haha sorry my iPad run off with the keyboard . See the first posting .
Once again Trojan data seen to change depend which data sheet you look at

[DefinitelyMe]

(Deleted)

[GordMay]

Originally Posted by medsailor1

18.2v haha sorry my iPad run off with the keyboard . See the first posting .
Once again Trojan data seen to change depend which data sheet you look at

OK, 14.82V is correct for bulk charging (16.2V for equalizing) T-125s.
Differing batteries (of the same type) may have slightly different recommended charging regimes.
Obviously, different chemistries will require (larger) different recommendations

[smac999]

Originally Posted by motion30

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....

Balmar is funny and they have different voltage setpoints for bulk and absorb. By default the absorb is 0.2v less.

So once it reaches the bulk voltage for a bit. It drops to absorb voltage. Then Drops to float voltage. This is not industry standard at all.

I just set the bulk and absorb voltage the same.

[Pete7]

Originally Posted by medsailor1

If It is 14.7v that means I been over charging mine by .18v Now how much different that would make I not sure .

Not necessarily, depends on the battery temperature. Settings are for 25'c with a plus or minus figure depending if the batteries are warmer or colder than the 25'c.

Seen 15.1v going into on my Trojans, but is was cold outside and so was the water temperature.

Pete

[Adelie]

Originally Posted by medsailor1

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 .

18.2v would fry the batteries.

Bulk charging is current limited by the charger and voltage will drop to whatever level the battery will accept for a given max current. As SoC goes up so does voltage. When battery reaches whatever the target voltage is the charger starts limiting voltage to that target and current drops over time as SOC goes up. Absorption starts when the batter goes from current to voltage limited. With a bigger charger when that happens changes.

[medsailor1]

18.2v Abs was a miss print guys , save people keep quoting it .

[medsailor1]

Originally Posted by Pete7

Not necessarily, depends on the battery temperature. Settings are for 25'c with a plus or minus figure depending if the batteries are warmer or colder than the 25'c.

Seen 15.1v going into on my Trojans, but is was cold outside and so was the water temperature.

Pete

Pete we in a hot climate. Plus batteries are under our bed but there is a vent going out ,
That said maybe is a good thing as the bedding protect them from air temp and being down to water level may also help .
Of cause I'm just guessing here .

In reality how much damage would be done it a batteries bank was charge that bit highter? (14.7-14.82v)

I had this back and fro email conversation with Trojan the other week , him sending me question and me replying , in the end he couldn't say why so much capacity been lost in so little time .
But he did say my MPPT setting where right for my batteries .

Just to throw in another question , do batteries really need to reach float ?
Isn't replacing what's taken out in ah enough?
Let face it some years back before all this tec stuff and BM /solar so on , all that charge out batteries was the alternator and we all know that never got as far as putting in the last 5 % let along going anywhere like Float and batteries last for years then .