An update after about 5 months of solar. TL;DR version-- so far, so okay but big regret on the batteries.
System is 19 Panasonic panels, 360W each, with IQ7 microinverters, and (3) Encharge 3.3kWh batteries.
The good news is that everything is working and the batteries even kicked on once for about 5 minutes during an outage.
There are a couple minor annoyances:
1. The battery monitors consume a noticeable amount of power. Like 1.4kWh per day. That adds up and was NOT something I expected at all. It wasn't in the system size calculations either. Is it a huge deal, no, its less than a panel, but it does bother me that it was a "surprise".
2. The Enphase app isn't quite working right. It shows my generated power as instantly consumed. The system works right, it just doesn't show right in the app. They thing something was installed backwards, but haven't come to fix it yet. That's annoying.
3. A relay failed, and right now my load shed is jumpered. It's been like a month waiting for a replacement part. So that failsafe is currently not functioning, although I did the math and as long as I don't run the dryer, the whole rest of the house can be on and it would be OK. So no dryer if the grid goes down. OK.
4. I am a little concerned about performance. So far I am getting about 70-80% of the power in the projections. Now, it's only been 4 months, so maybe it's just been cloudier than average. But I am definitely keeping an eye on it.
However, there are some big things I would have done differently, related to the batteries. Frankly, I wouldn't have added the batteries at all. They were about half the cost of the system, and I discovered better options for me after the fact.
First - our biggest power outage concern is our well - gotta have water. But I could have just as easily put a small rechargeable battery and a soft start on it for maybe $1,000. No power for anything else, but would have water. Unfortunately I didn't know this until an electrician told me that is what he was planning to do when he went solar.
Second discovery is using an EV as the house battery. Now instead of dropping $20k on batteries, you can drop $40k on an EV and use it as the house battery. And the capacity would be 5-10x more! I could run my house for a week off the Tesla Y, even in January. Still a cost to "plumb" it in, but getting the dual use of backup power (rarely needed) from something you use frequently and have to have anyway (car) seems like a no brainer.