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)
Only when renewable.solar or whatever IS a profitable business will it thrive.
Current power plants exist for the purpose of making money for their investors;electricity happens to be the product they believe is the best way to make money.