To understand how renewable projects work is to compare it to a bond or an annuity. A bond involves an investment of a fixed amount upfront from an investor to a borrower. After the investment, the borrower pays an interest (fixed or variable) at fixed intervals till he returns the principal borrowed.
In a similar fashion, renewable projects require an upfront investment to build the project. After the project is built, the power generated is sold to a power trader like DISCOM/Utilities or consumers of power like Industries, Commercial or Residential complexes.
So if you invest with us we use your capitals for our projects and the success of our projects will generate good returns for us and our investors.