Having issues with Over-voltage shutdown

My house is totally off-grid. My setup looks like this (from Schneider's Insight):


The Inverter charges from an SMA Sunny Boy and uses frequency shifting to tell it when to charge and when to stop. It has been working fine for the last 3 years, and now all the sudden I'm getting hit with these over-voltage errors which will cause the Schneider inverter to trip the whole system:



The company that installed the batteries and Schneider equipment is blaming the SMA (naturally it couldn't be any of their stuff). I'm a total idiot when it comes to this stuff, and all of my understanding is based off of conversations with the battery company, so perhaps I'm not explaining everything correctly.

Their explanation does make sense, and they did walk me through going through upgrading the firmware on all the Schneider devices (MPPT, Gateway, and Inverter). I was able to figure out how to update the firmware on the Sunny Boy as well, but it didn't fix the issue either.

Does anyone have a similar setup that can help me figure out why the SMA doesn't stop charging the battery when it's all the way topped off?

I can see that throughout the day it does turn off the SMA at certain voltages though:

Is there a reason the battery voltage is so high?
3.46v/cell is above 100% and likely some cells are reaching high voltage disconnect.
I would adjust the charge voltage down below 3.4v/cell...

I would alter the charge parameters so 54V is full

Supervstech said:

Is there a reason the battery voltage is so high?
3.46v/cell is above 100% and likely some cells are reaching high voltage disconnect.
I would adjust the charge voltage down below 3.4v/cell...

I would alter the charge parameters so 54V is full

Click to expand...

I didn't setup the system, so I'm not sure. Here what I could find from the Inverter config, do you see something I should change?

Wow, 56V absorption is 3.5v each.
Fine for new well balanced cells, but as they age, drift can happen.
If any cells are weak they will reach 3.65 first and the bms will disconnect. That would allow the system to overshoot.

I would think the absorption should be 54 and the boost to 54.5

I will try that, thanks!

@Supervstech so I made that change yesterday, but today my Sunny Boy hasn't charged at all. Like the Schneider inverter hasn't told it to charge

What voltage are the batteries?

Supervstech said:

What voltage are the batteries?

Click to expand...

MPPT had them about 53.6 all day, but the batteries showed that they never got above like 50% capacity since I'm only getting like 1800W max from the MPPT