New EG4 LifePower 48v Batteries - Does this look normal

1. From day one, I received Low SOC alerts at about 14% of charge. I do have the stand alone 48v charger from SS and I did top off each battery battery before I installed them in the rack and connected them to the inverters. After receiving the errors, I returned to grid power and charged the batteries back up. Ran another cycle off the batteries, this time all 4 batteries Low SOC alerts. Is this normal operation for these batteries to provide Low SOC alerts?
2. Battery Pack 1 has cell overvoltage alarm. Is this an issue?
3. Battery dates are concerning. Purchased all 4 at the same time in June 2022. Two batteries dates/times are from 2020, and one from 2080!!!! Any ideas here, someone being funny from the factory? Did i receive two batteries that were sitting for two years? Its looking like quality control is lacking here.
4. Should all cells be in a state of balance?
5. How close should each cell voltage be?
6. How often should they be rebalanced? Is this a manual process or will the BMS rebalance as needed?
7. I still get error 61 even with configuring per SS last video. This is only happening at low SOC and at full charge, This is very annoying. If I don't use a communication cable to the batteries wont error 61 always be there?

sunshine_eggo said:

Double check that any custom connections you made are properly torqued.

When you see several cells below 3.4V and cells above 3.4V balancing, you have a balance problem to some degree.

1. This may be baked in.
2. It likely occurred during your last full charge. Recommend you push the batteries to full charge and then watch what the cells do. You may find that one went well above the others and triggered the alarm forcing charging to halt.
3. Probably bad programming.
4. All cells should be balanced. The idea is that when you hit your peak absorption voltage, all cells are at the same voltage within, say .02V or so. The cells flagged with (Bal) are likely balancing. In many cases, BMS start balancing when cells hit 3.40V and a deviation is larger than X.
5. See #4
6. Every time they are charged. Automatic.
7. No idea

Perhaps @RichardFromEG4 has some input?

Click to expand...

jmjack said:

sunshine_eggo - Thanks for the feedback!

Can you expand a little on what you mean by pushing the batteries to a full charge? Other than letting the inverter do its thing as it's programmed for EG4 batteries, is there something I should manually?

Click to expand...

Mblanke said:

We just flipped the switch to go total solar this week. (3 Growatt 5kW, 2 transformers, 36 455W panels) Each morning this week - we are back on the grid. We purchased 2 additional batteries within the last 4 weeks to add to our 4 original batteris and the 2 new batteris were on "alam" this morning. When solar came up and the batteris came up the alarm light went out. Wondering if our "new batteries" have issues. How does this get fixed? Where are the dates located?

It also appears that our batteries are subsizing our power during the day when our usage is minimal. This appears to result in our batteries not at full charge when solar goes dark. Not sure what the deal is. Disappointed and frustrated but hopeful everything gets worked out.

Click to expand...

jmjack said:

Hello,

I am needing some help understanding what I am seeing from BMS Test.

I have just completed my installation of two 6500EX-48 inverters in split phase with 4x EG4 lifepower4 48v batteries. All 4 batteries are installed in a SS rack to the bus bar. I did remove and flip the ground bus bar to attach the DC cables at opposite ends of the stack. Used 4/0 cable from bus bars to small wall bus bars, then 2/0 cables to breakers then to inverters. I used 2 ga cables to attached batteries to bus bar.

Here are my current questions/issues:

1. From day one, I received Low SOC alerts at about 14% of charge. I do have the stand alone 48v charger from SS and I did top off each battery battery before I installed them in the rack and connected them to the inverters. After receiving the errors, I returned to grid power and charged the batteries back up. Ran another cycle off the batteries, this time all 4 batteries Low SOC alerts. Is this normal operation for these batteries to provide Low SOC alerts?
2. Battery Pack 1 has cell overvoltage alarm. Is this an issue?
3. Battery dates are concerning. Purchased all 4 at the same time in June 2022. Two batteries dates/times are from 2020, and one from 2080!!!! Any ideas here, someone being funny from the factory? Did i receive two batteries that were sitting for two years? Its looking like quality control is lacking here.
4. Should all cells be in a state of balance?
5. How close should each cell voltage be?
6. How often should they be rebalanced? Is this a manual process or will the BMS rebalance as needed?
7. I still get error 61 even with configuring per SS last video. This is only happening at low SOC and at full charge, This is very annoying. If I don't use a communication cable to the batteries wont error 61 always be there?

Would appreciate any help or insight. Output from BMS Test is attached.

Click to expand...

Mblanke said:

We just flipped the switch to go total solar this week. (3 Growatt 5kW, 2 transformers, 36 455W panels) Each morning this week - we are back on the grid. We purchased 2 additional batteries within the last 4 weeks to add to our 4 original batteris and the 2 new batteris were on "alam" this morning. When solar came up and the batteris came up the alarm light went out. Wondering if our "new batteries" have issues. How does this get fixed? Where are the dates located?

It also appears that our batteries are subsizing our power during the day when our usage is minimal. This appears to result in our batteries not at full charge when solar goes dark. Not sure what the deal is. Disappointed and frustrated but hopeful everything gets worked out.

Click to expand...