[Solved] Help! - Had solar panels, EG4 Inverter and Batteries installed in 7/2026- Has never been right.

With 42 panels, what do your strings look like?  Are the voltages of your strings in the specified range for a Flexboss 18? The max for any given string is 600v, but usable is less than that and you really want it under 500 volts.  With only two mppts on a Flexboss18, 24 panels per string seems like a lot.  What are the specs for your panels?  I have a Flexboss 21 with 400 watt panels and the max number of panels I can have per string is 14 before my the voltage is over what is recommended for each mppt.

I would tend to agree with @lyrawinslow. There could be a high current load or loads that are contributing to the problem and the inverter (or batteries) are being overloaded. I would suggest looking at the data monitor. In specific, the AC side PLoad and the battery Discharge power. Do you know the total power (loads total) that can be pulled on the backed up circuits being powered? Also remember that the updates on these data monitoring are only updated at around 2 to 3 minuets. So if something were to pull too much current for a small instant, the monitor alone may not catch or show it. Could the battery BMS discharge limits be set too low? How many batteries do you have and are their limits set the same?

Thanks for your replies. After much effort and many hours of calls and adjustments by both my installer and EG4 support, it appears as though my problem has been solved. Not honestly sure what they did, because it was many different things over an extended period of time. Will have to monitor and see how it does moving forward. Thanks so much for all of the input.