"Rooftop panels" refers to solar panels that are installed on the roof of a building to capture sunlight and convert it into electricity. Full definition
In the case of rooftop panels, they can either be owned outright and rolled into the home price, or made available for lease on a monthly basis. (instituteforenergyresearch.org)
Around three out of four voters (76 percent) say the solar power should be generated from rooftop panels. (earthtimes.org)