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All, I have gone through posts about the Fronius IG 4000. I have the State 421 code. 13 years old so I'm looking to replace. The unit I'm replacing covers 20 205W panels. Grid tied. I'm a GC so I now a decent amount about a lot. Just not enough about electrical so I need help sorting...

I have a current 20 panel system. My Fronius inverter went bad so I installed a Solaredge SE5000H inverter. I have not changed anything on the system except for switching out the inverters in the same spot. My system is as follows: 20 panel Single string Sticker on my previous inverter has the...