Would it be possible to decouple the roof from the solar? In other words, I'd buy this roof for the cost of a normal roof, and an investor would pay for the cos

Would it be possible to decouple the roof from the solar? In other words, I'd buy this roof for the cost of a normal roof, and an investor would pay for the cost of the solar panels, and they'd own the electricity that comes from it. The panels would provide me a power backup (in the event of a power cut), for which I'd pay at the same rate as I pay the grid. This would be helpful for houseowners who want to be green, or want backup in the event of a power cut (a regular event in India), but don't want to or can't invest so much in a roof. They get power backup without making an upfront investment. Investors would benefit from getting a free site to install their panels on.