I highly recommend making an account and using energy sage. It will give you multiple quotes from local installers. Compare that with tesla and costco Sunrun panels.
Briefly, we bought a model 3 (love it) wanted solar panels to go along with it (live in new jersey). Got multiple quotes. Tesla and Sunrun were $3.70/kwh - $20,000 for 5.4 KW system. A local company called solar energy world installed our panels for $2.5/kwh - 13,500 for the same 5.4 KW system. It turns out they used better panels, in terms of efficiency.
PS you can also compare different panels on energy sage.
I am in the medical field. So, I chose the installer because they were significantly cheaper with better panels. I might've missed something. Also, the quotes are very different in different states. I recommend doing some shopping around - you will save thousands of dollars!!