

It can delivery high returns, but over a long period of time. A long enough time that the scammers are long gone before the promised results or the problems created by shoddy work show up.
I say this as an advocate and personal consumer of rooftop solar. One of the hardest steps was simply choosing the company to go with for the purchase/install/service. I chose the local company that had been around for 25 years servicing my area. I passed up many lower priced quotes to do so buying premium equipment and expensive installation (compared to competitors). I’m happy with my purchase.
Solar is one of those really funny areas where extreme left and extreme right folks overlap sharing some of the same views. The extreme left are greenies with “carbon free power only! No to fossil fuels. No to nukes, even if we freeze or starve. Oh, and fuck cars” While the extreme right are the “my individual freedom means no government controlling my power and autonomy, and I love my F-150 like I love my son”.
There are a few solar power forums and these two polar opposite groups interact regularly. Both groups work very hard to hold their tongues on their respective beliefs, but every now an then one of them can’t help themselves and like the friends holding back the drunk friend at a bar fight, they drag each other back from the brink. There’s some passive aggression on both sides with choices of user avatars clearly showing their extreme position. Sometimes signatures under posts do the same thing.
The most interesting is when a deep deep red guy is patiently explaining battery management or solar array optimization to an idealistic young blue person, and they’re both getting along hating buying grid power from a giant government backed monopolistic corporate conglomerate.