I had a similar issue, my inverters were replaced and the new unit did the same thing just not as often. SS had me change my settings and quit using EG4 in setting 5. It been about a month and things seem much better. The following is the settings I was asked to use,
User Settings: Change setting 5 first, if settings are still in percentage mode turn off inverter and then back on.
Setting 1 SBU
Setting 2 80a
Setting 5 to USE
Setting 12 to 48V
Setting 13 to 57V
Setting 26 to 57V
Setting 27 to 56V
Setting 29 to 46V
Thank you!
Just to make sure that the firmware update uploaded the 2nd CPU display screen it should read 61.06
Note, I use solar assistant for controlling my battery charge, the settings from SS seem to discharge to low