If it sounds too good to be true, then I get very nervous. The 20 year contract scares me more then any other part of it. Solar technology is changing quickly and anything you get today is outdated tomorrow. It's just like computers and most electronics. Unfortunately, solar has the government behind it for political reasons, so it's forcing bad technology on us with government subsidiaries to make up for the fact that it loses money. My thinking is that this is a government program that will disappear in a short amount of time. Probably in a few years. What happens then?
A good example would be the windmill farms in CA where I grew up. They came in and put up some windmills that would create electricity with money from the government. A private company ran it and sold the power to the utilities. Once the government funding ended, they went bankrupt because it costs more to maintain a windmill then it earns by generating electricity.
Those windmill farms are falling apart and have been for decades. They are still putting new ones up, but the pattern keeps repeating itself. There are thousands of windmills there, hundreds of millions spent and it's all a game for the politicians to say that they are saving the planet.
Be very cautious.
Eddie