My neighbor across the street has solar panels. I chatted with him once, and he brought them up. I asked if he got the battery wall too, and he said no, but seemed slightly miffed. Then, he said his electric bill was $60/mo. I probably didn't seem suitably impressed, I didn't tell him mine is $50/mo. and I don't have solar panels, I just don't use much electricity. I wanted to ask whether he was leasing them, or took out a loan for them, but didn't.
I think the only way residential solar panels make sense is to have a battery, especially in the winter when we get a lot less sun, and most people are at work during the day, so a lot of residential electrical use is after sunset. That's why I asked, but I didn't say any of that to him.