Generally, local governments require solar installers to obtain a permit for rooftop panels before they can be installed. . Permitting and inspection are required before a solar array is allowed to produce electricity on the grid. Solar panels can't be put on a roof without first having mounting brackets installed. The solar panels are shielded from the elements by the mounting and solar racking system, which can. . Placing PV panels on residential roofs is a balancing act between getting the most possible wattage and creating safe pathways for first responders who may have to climb the roof in an emergency. Synopsis: In this installment of Know the Code, code-expert Glenn Mathewson details the commonly. . Local government regulations restrict the installation of solar panels on rooftops,2. Structural integrity and safety issues must be carefully evaluated,4. Racking systems shall be anchored to solid wood roof rafters or to solid wood blocking with a minimum of one 5/16” diameter lag screw embedded a minimum of ��. .