This is a money making scheme, and nowhere do I read what happens in 5, 10, and 15 years as the photovoltaic progression yields greater and greater savings and quality, and you are stuck with old technology at a time when new developments far outweigh the old.
My meter rates are not rising at the rate suggested because the power company has to remain competitive against the gas company, and against any new competing technology. Never be first in or last to accept "new" tech.
For the bottom line, when the grid goes out our my local power shuts down, a massive and nationwide group of linemen, are there in all kinds of weather to restore power. A slick roof in bad weather to a local business man or his employees, is another story.
You remain on grid if your panels are working or not.
Hey, anyone is free to buy and maintain their own PV equipment and upgrade as often as they wish as new technology becomes availabe.
This firm is offering another option and business model, the deal seems plain and up-front, and they're entitled to the future profit if they can later retrofit the system with new technology to further lower cost.
More power to them (so to speak)
In bad weather your solar panels won't be producing anything so it is unlikely you'll be on the roof fixing it during bad weather.
And last but not least, you are still connected to the grid. If your solar system fails, you still have power.
As I read it, if you want the system off your property within the 25 year period, they come get it, and you lose only a $500 deposit. Frankly, if better, cheaper, more reliant systems came along, they'd probably replace older ones, so they could have more power to sell on the grid.