Solar Panels, for CIVIL discussion

They used to be hazardous waste that the consumer had to pay to recycle, but one day somebody decided they weren't hazardous any more......
I get promos in Arizona from people that say they will Give meFREE solar panels, and install for nothing (not nothing down).
There MUST be some nefarious reason they are promoting this so hard.
(And I don't for a minute believe anything is free!).
Reminds me of FREE covid shots that I didn't get either!