What does your rooftop use for? BBQ or anything we can do?
Yes, you are right, we can earn money and make life with green power: install solar system to generate electricity to power your household equipments.
How solar system works? Not only those flat rooftop, also includes those pitched rooftop, install solar panels with aluminum light mounts. Connect grid-tied PV inverter and deliver extra electricity to the grid; or use battery pack to storage electricity for loads.