outage blips Flexboss21 + gridboss21

Update:

I performed a full system shutdown and restart, grounded my PV array separately and removed some panels from two of my strings to drop my voltages. Each of these changes has seemed to help. I am no longer getting power outages that last 1-2 seconds and switching power to grid. 

I am now getting outages that last less than 1 second, even in the middle of the night with a steady low load. Working with the techs to determine the issue as it is not apparent in the data logs. I do see some small irregularities with battery voltage...

Finally about being able to reach support, I was calling a different/incorrect phone number trying to reach support which was never getting me through, it had a slightly different phone tree. 903-441-2090 is the correct number for me. 

Posted by: @bporter

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Since 7/29 I've had three "Blackouts" and none of them required any WiFi resets or clock resets.

While this is better it's still not ideal.

What symptoms do you see when you have a "blackout?"  Ie, if this device plugged into your outlet wasn't telling you that you had a "blackout" would you even know it happened?

The reason I ask is that all inverters have a transfer time.  On the EG4 inverters I've looked at this is configurable, but usually is at least 10ms (and it might default to longer).

Any sensitive enough measuring device is going to be able to detect the interruption in power when an inverter switches into off-grid operation.  It simply isn't realistic to expect an inverter to produce power that is so continuous that any interruption is undetectable.

I've been following some of the recent firmware issues with great interest, but at best the EG4 inverters are going to deliver power within their specifications, which is a configurable transfer time of no less than 10ms.  If the interruption in power doesn't exceed whatever yours is set to, then it is performing as advertised.  It might still register on a measurement device, but it shouldn't cause interruption to any normal consumer product.

Now, if you're seeing lights flicker or devices reset, then that is a problem that shouldn't be happening (though with the current released firmware it is an issue).

I have been on lead-acid mode with my 3 outdoor 14.3kWhr for a few weeks now with zero inverter "blackouts". Still some voltage fluctuations/light flickering when loads power on so EG4 is convinced it is a grounding issue. I hope to go back to lithium SOC mode in the future.

I am now having several other issues, but at least no more inverter shutoffs.  

I had a similar experience running on Self-Consumption Mode except AC Charge Mode during the day to charge the batteries using AC Coupled Solar input through the Flexboss21 load ports ( https://eg4electronics.com/wp-content/uploads/2025/04/EG4-How-to-AC-Couple-on-Load-Port-w-EG4-Hybrid-Inverter-and-GridBOSS.pdf )... I experienced power outages just before and after changing from Self-Consumption to AC Charge Modes... Lots of brown outs (Vac < 108V) throughout the time in Self-Consumption Mode… Here's an example Ting graph:

System is a GridBoss, 2 FlexBoss21, and 6 Wall Mount Indoor batteries all connected in parallel with one inverter as the master… PV is 39 SunPower SPR-X21-335-BLK-C-AC Solar Modules (13,065 W DC) with Enphase microinverters connected as 3 strings of 12 and 1 string of 3… The PV is connected to the FlexBoss21 Load Ports per https://eg4electronics.com/wp-content/uploads/2025/04/EG4-How-to-AC-Couple-on-Load-Port-w-EG4-Hybrid-Inverter-and-GridBOSS.pdf simply because of the separation between the GridBoss and FlexBoss21's and the lack of additional conduit space between them… 2 strings of 12 into 1 inverter load port and the remainder to the other inverter load port...

Similar issue here.  GB/FB21 and 3 indoor wall-mount batteries.  EG4 set me to lead acid to see if the issue goes away.  No issues for 6 days.  I had 5 outages in 2 weeks previous to setting everythmg to lead acidamd using voltage instead of SOC.  More details on my particular issue can be found here.  <a href=" removed link " target="_blank" rel="noopener">gridboss-and-flexboss21-momentary-blip-in-power-to-backup-loadI would think this is something egt4 wants to fix.  Clearly people are having issues.