Each USA state is different. Some states have community solar, but only Maine and Minnesota allow on site solar and community solar to give discounts on the same utility bill. Some states do not allow community solar. Sometimes it available only in certain areas of the state, as it has to be through the “local” utility.
New York State has an entity called NYSERDA, New York State Energy Development Authority that has an information page at https://www.nyserda.ny.gov/All-Programs/NY-Sun/Solar-for-Your-Home/Community-Solar/Community-Solar-Map. Many subscription companies are giving 10% credit to the subscriber of the kilowatt hours attributed to their electric account by the utility and community solar installation, which works out to about 8% of the bill in most cases. New York State also give a 20% (about 16%) option to account that have some form of public assistance. Sometimes a subscription site (the interface between the utility and the solar energy production site) will have a la site with a larger 20% discount available to all utility customers. Bothe residential and commercial accounts in NYS allow participation in community solar. Do your research (or ask us to) and ask questions when you call the subscription company. one site in NYS is powermarket.io In many cases all of the billing is done through your utility. To find out you probably have to put in your electric account number. There are maps that each subscription company has made of available comunity solar sites according to your zip code. Sometimes a subscription company will give a bonus to the whomever refers the new customer. the Nyserda site above has all the NYS sites and who the subscription company is, so go there and scroll down to see, the look at the data sheet for info. Powermarket.io has sites in Illinois and Maine that have a better %. It seems that when a state gets a lot of community solar sites, like New York, gets filled up with subscribers and the rate is about 10%. But there are two new sites in Illinois that are giving a much higher percentage. It is probably possible to start your own solar site with a group of people who want to invest in it. Or put solar on your roof, but a large community solar project could cost the same, as small individual sites combined. And a community solar discount if free to get in and free to get out, for the most part.