Rooftop actually has a few advantages that counter act its increased cost vs farms: - Because the panels are geographically distributed it has less variance. A

Rooftop actually has a few advantages that counter act its increased cost vs farms: - Because the panels are geographically distributed it has less variance. A cloud can pass over a solar farm and you get one huge megawatt swing but when distributed it is much more predictable. If it is 50% cloudy you will get 50% generation continuously. This means grid operators can reliably bring cheaper larger sources with slower ramp rates online that day like nuclear instead of gas turbines. These also reduces the need for energy storage. - Because the panels are closer to consumers there are less transmission losses and decreased capital cost in terms of energy transmission. Although distribution lines may need to be upgrade to compensate.