How to make money with solar?

Could you elaborate on the various ways to generate income through solar energy? Are there any specific investments or business models that have proven successful in this field? Additionally, what are some of the challenges and considerations one should keep in mind when embarking on a solar-powered venture? Furthermore, are there any government incentives or subsidies available to encourage and support such endeavors? Finally, how does the profitability of solar-based projects compare to traditional energy sources in the long run?