The problem I hear about in Arizona, is that utilities and local government offer subsidies to homeowners to install solar panels.
To get the subsidy, you conform to the rules attached to the installation:
The panels are tied into the local power grid, you don't get the option to run your house off the panels, as they are supplying their output to the power company. You are offered a discount rate because your panels are tied into the power company grid, but the
panels are legally the property of the power company, and must be installed to their specifications. After 20 years, the amount of
time most solar panel manufacturers rate their panels for efficient output, THEN the panels belong to the homeowner.
As BobK mentioned, be wary when dealing with these 'freebie' solar panel schemes. I also, would only buy them independently,
as I would want the benefit of solar electricity for me, not the local power company.
Most everybody here considers the possibility of solar panels because of the sunlight available, the pros and cons of benefits need to be investigated before a commitment. The 'freebie' program is probably ok with a lot of people, but might not be for others.