Reinforcing a roof for solar panels: needed or not?
Most home and small commercial solar installations are mounted on a rooftop. This makes a lot of sense, because a rooftop is a readily available surface for mounting panels. Solar panels weigh less than you might think. Even so, sometimes a rooftop isn’t suitable because of the additional load that a solar array would place on a structure. In those cases, a homeowner might be able to upgrade their roof structure to support the additional load.