FWIW. The panels are $0.86/wh each with a micro-inverter that runs ~$160 per panel and 32 panels. So, ~$5000 for inverters, ~$11k for panels, which brings you to ~$16k and your not even tied into the power of the house, or adding the mandatory shutoff, or the new meters, or the Emphase system that tracks by the minute power consumption and usage of each panel, etc etc. So lets call the rest $4k

Total of parts ~$20k. $12k for construction in the Seattle area seems fair for a complex electrical install that includes a 10 year install and 25 year system warranty.

I think like many things, the last mile of work is way more expensive then people realize. Solar is more than the panels themselves

Note: I could have used cheaper panels, but they take up more roof. I could have also saved money by skipping the per-panel micro-inverters, but then the system is more brittle and less efficient