Solar Panel Installation Classes

Home Owners Association limitations on Solar Panel/water heater installation?
I’m writing a paper for my environmental law class and am looking for a starting point having to do with maybe the different restrictions state governments place on HOAs in their ability to limit solar panel and/or water heater installations on homes. Any help would be great, thanks!
Currently right now the Covenant, Conditions and Restrictions (CC&R’s) of Homeowners Associations would allow their board of directors and management companies (if contracted) to restrict the use of Solar Panels because of uniformity to standards of all housing units within the association. But your point is well taken, because in time when home owners should be allowed to manage their energy consumption, look to sources to improve their energy needs and reduce the amount of energy consumption from commercial sources, the placement of solar panels is a very important endeavor each home owner must be able to adventure into without HOA restraints. There is no doubt many court cases will arise between HOA’s and homeowners on this very issue.
You selected a very good subject and cause. I would be very interested in the outcome.