Battery Order when Wire in Series ?

[Sunking]

Trojan did write back. Said about the same thing as is posted above ...

Thanks for the feedback and confirmation.

[Matrix]

Not sure you have a problem here as the spread is less than 30 points. Specific Gravity is not going to be perfectly even across all cells. It means when the batteries were activated, water/acid was mixed was done in more than one batch. In other words one batch had a Tablespoon or two more acid than the other batch(s).

I assume you are using a Temperature Compensated Hydrometer and compensating for temp differences? Assuming the temps are the same, the only way to get all Specific Gravities the same is to empty each battery into a common container, then refill the batteries, that is not going to happen.

Try this. Use your hydrometer like a Turkey Baster. Suck up electrolyte into the Hydrometer, and squeeze it back out as hard as you can without splashing several times in each cell so as to mix/agitate/stir the electrolyte up. You might have Stratification which means the heavier acid is at the bottom of the cell and water floating on top.

To be honest I do not think you have a real problem other than minor differences of acid to water ratio. Also make sure you are adding water properly to the correct level. After water is added you must give the batteries a proper normal charge from an AC charger followed by a EQ charge. 15 points spread is within normal parameters.

Post back what Trojan says. They are pretty quick to respond.

Trojan did write back. Said about the same thing as is posted above ...

Trojan Batteries
I would give it some more time, daily use and cycling the batteries as normal will likely cause the gap to decrease. A range of 10-15 points is not alarming, especially considering that the batteries are still in the part of their cycle life where they are completing the formation process. Give it a month or so, then check the electrolyte level after they are fully charged, or even after an EQ cycle. By then it may be time to add water which may level the gravities to some degree.

[littleharbor]

Can someone erase my posts on this thead please?

You can do it by using the edit feature in the bottom right corner of your posts.

[Higher Voltage]

Can someone erase my posts on this thead please?

[littleharbor]

Threads get confusing when there are answers being given to more than the original poster. Yes, start a new thread.

[Higher Voltage]

Should I have started a new thread? I looked for a similar situation. Is that not appropriate conduct of this site ?

[Higher Voltage]

What does that mean?

[Sunking]

I checked my batteries when charging and they do not charge at the same V. The bank is the same V . Is there another solution ?

Stop hijacking threads.

[Sunking]

Wrote this to Trojan. We'll see what they say:

Not sure you have a problem here as the spread is less than 30 points. Specific Gravity is not going to be perfectly even across all cells. It means when the batteries were activated, water/acid was mixed was done in more than one batch. In other words one batch had a Tablespoon or two more acid than the other batch(s).

I assume you are using a Temperature Compensated Hydrometer and compensating for temp differences? Assuming the temps are the same, the only way to get all Specific Gravities the same is to empty each battery into a common container, then refill the batteries, that is not going to happen.

Try this. Use your hydrometer like a Turkey Baster. Suck up electrolyte into the Hydrometer, and squeeze it back out as hard as you can without splashing several times in each cell so as to mix/agitate/stir the electrolyte up. You might have Stratification which means the heavier acid is at the bottom of the cell and water floating on top.

To be honest I do not think you have a real problem other than minor differences of acid to water ratio. Also make sure you are adding water properly to the correct level. After water is added you must give the batteries a proper normal charge from an AC charger followed by a EQ charge. 15 points spread is within normal parameters.

Post back what Trojan says. They are pretty quick to respond.

[Higher Voltage]

I checked my batteries when charging and they do not charge at the same V. The bank is the same V . Is there another solution ?

[Higher Voltage]

Are these balancers a power sucker? Similar units are used for Li Po s.

[Sunking]

You need a balancer. I can send a link. I have a similar problem. But I have 48 batteries.https://www.alibaba.com/product-deta...52ca246eQyhUMe

You just bought a thingabobby that does nothing except make you wallet lighter and the sellers wallet heavier.

[Higher Voltage]

So I have them set up normally 12 12 12 12 =48v bank x 12 of these. Im going to try 12 12 12 12 12 12 12 12 12 12 12 12 = 12v . parallel. x 4 of these to =48v. The reason is batteries balance in parallel but not in series. Does anyone object?

[Higher Voltage]

You need a balancer. I can send a link. I have a similar problem. But I have 48 batteries.https://www.alibaba.com/product-deta...52ca246eQyhUMe

[Matrix]

Wrote this to Trojan. We'll see what they say:

Using L16H-AC for solar. 4 Batteries in series went into service Oct 16, 2017. EQ was first done a week later with AC charger. But In the past 3 weeks, SG in 3 out of 4 batteries have been lagging behind at 100% charge by about 15 SG points. Trying an EQ to raise all batteries to same SG, but having no luck on one battery.

Charger: Conext SW 4024 AC Charger: 32v 60 min Fixed EQ charge option highest setting for EQ. This is the highest volt setting that I have available with this charger.

Have done a carefully monitored EQ until SG appears to stop rising on all batteries. Have EQed 4 times monitoring SG each hour. Temps do not exceed 75* F (cool morning). SG has appeared to stop rising. Battery samples are as follows

20 min after last EQ
- Battery 1 - 6.88v: 1299 Center cell (positive to inverter)
- * Battery 2 - 6.88v: Lowest - 1295 / 1291 / 1290 All cells
- Battery 3 - 6.90v: Highest - 1305 cell closest to negative post
- Battery 4 - 6.88v: 1302 center cell (negative to inverter)

So I still have about a 10-15 point gap on one battery all cells. All 4 batteries are a month old.
- What can be done about this?
- Is this a problem?
- Are they still breaking in?

Thanks