Strange, I was looking (in SF) in the end of 2022 for a 4kW system and I was getting quotes of $20k before credits.

(My installer ended up flaking on me, and then I gave up because NEM 3.0 was coming too soon to find a fallback.)

Was this rooftop or ground mount? Asking because I keep getting rooftop quotes closer to $20k than $12k