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Topic starter
September 26, 2025 4:08 pm
Hi I have the flexboss 21 running with 3 indoor batteries. I bought this for home backup during outages.
I originally had it in backup mode but every 5 weeks or so the batteries would fail and with "low battery voltage" issue.
I have since changed to Self consumption mode so the batteries charge in the day and are used at night. Originally I set Off-Grid Cut-Off SOC(%) to 60 but then same issue if it fell below 60% the batteries would fail. I then lowered that value to 10% cut off but alas the SOC fell to 6% two nights ago and the batteries failed again.
Seems there is a bleed issue and it's not being tracked. Each time the batteries fail I have to physically reboot the batteries for them to start back charging.
I tried to email support but got no response.
Any suggestions help would be appreciated.
Also anyway to get notifications email or text when there is an issue? I don't know these issues happen unless I login to check the system.
September 30, 2025 4:12 pm
I apologize that no one has been able to get in touch with you. We have been receiving a high volume of emails, but we are responding to them in the order they are received
However, I can offer some assistance to you.
You have 3- EG4 WallMount batteries? how do you have them connected?
Topic starter
September 30, 2025 5:11 pm
@eg4eric they are connected in series. The first battery is connected to the FlexBoss and the other 2 are chained after it. On a side note I also have the GridBoss and my solar is AC coupled to it. No solar is going directly to the FlexBoss
Topic starter
September 30, 2025 5:17 pm
Just wanted to add that another family member has the exact same setup and is also facing this issue
September 30, 2025 10:02 pm
If possible, I recommend wiring the batteries as shown in the image below. I'm not saying that this will resolve the issue completely, but it could be the majority of the problem.
Do you know the voltage of the batteries when they are at 60% and then when they fail?
Just want to clarify, when you say fail, do you mean they are depleted, and they are at 0%?
