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Solar Panel installation vs. Solar Shingles. The major difference between solar roof shingles and solar panels is in the installation process. Installers usually need to bolt solar panels onto the roof, which requires drilling through the roof and can violate its warranty.
Solar panels are modules made up of cells, like the kind you see on a solar-powered calculator. A racking system is used to attach the panels to a rooftop. Installers will orient the rack to make sure the module gets the most direct sunlight possible.