3 year old Solar System

So I purchased a huge 80 panel PV system in northern California from a highly rated installer. However they were very sloppy in their installation and created electrical arcing in a junction box burning multiple strings of enphase micro-inverters. Now we didn’t know this before and assumed everything was installed properly.

This was creating a host of random and sometime intermittent issues like micro-inverters not reporting on various pv panels with no rhyme or reason so you could not tell which panels were working or not, micro-inverters reporting wrong productions numbers, randomly flipping breakers, micro flutters in my lights and some outages.

Installer initially came out a few times and worked with enphase support down at the ground level thinking it was something with the enphase equipment. After a few visits installer says they are not coming out anymore and ignores all of my calls, voicemails and email communications for them to fix this. They point me to enphase who also sends tech out to work at the ground level. They are not trained or insured to go on customer roofs. The enphase techs add line filters move electrical lines around to reduce interference trying to bandaid the symptoms but never fully realize the root cause. They come out over a dozen times with various techs with no solution. I have probably spent over 100+ hours with the various techs on their appointments at my house

I hire a second solar installer to diagnose only not to repair and they see the burning cables, arcing inside the junction box. I ask them for a complete review of my pv system plus recommendations on a lawyer. They probably contacted enphase to look up more info on my pv site. Enphase freaks out then sends supervisors who can go on roofs and they find the same issues and cuts off the burned cable end and rewire them properly. This seemingly fixes the issues.

I have probably lost out on probably $6,000-$7,000 in nem2 credits, the 100+ hours wasted with installer and enphase techs, and the various times I have had to run extension cables to sockets that work when some didn’t. Alot of unnecessary pain and suffering and and l am on edge about where else my pv system might fail or not work. My installer doesn’t even call to apologize or admit anything. The installer probably will not come out for any future support. This is all over a period of three years and I have had multiple case tickets open with Enphase every year since install.

Is it worth it to go after this installer and what’s the best path forward?

Location: Northern California