The amount of roof space required for solar panel installation depends entirely on the size, number, and kind of solar panels utilised (residential or commercial).
Solar panels come in a variety of sizes, depending on the model and manufacturer. However, the majority of installations use 60-cell or 72-cell modules.
The 60-cell panels are often classified as residential, while 72-cell panels are classified as commercial.
60-cell panels, on the other hand, are often 65x39 in, while 72-cell panels are typically 77x39 in. In other words, while 72-cell panels are taller than 60-cell panels, their breadth is the same.
Hence, the amount of roof space you will need can be determined by calculating the overall area of your roof divided by the overall area of the solar panel system.