The r/solar subreddit is a good place to start and has a handy FAQ. Just keep in mind that there are some significant regional differences in pricing. I think I had 10+ solar consultations, mainly virtual, and after a while I knew what was most appropriate for the house and had a good idea of competitive pricing. I definitely found the local installers to have the most competitive prices and are easier to deal with but also spoke with some national and regional installers.

I signed up for my system in July at $3.10 / watt, which was as low as I could get for a 2022 installation. Not sure what prices are now but it is good that the federal solar tax credit was kept at the same rate for 2023 due to the Inflation Reduction Act. If you want to PM me I can give you the details on my top two installers and who I ultimately went with and why.