Short Answer
The appropriate process depends on the solar system, mounting method, roofing scope and electrical considerations.
Detailed Explanation
In most cases, solar panels must be removed before a roof replacement can be performed — the panels and their mounting system cover the roof surface and must be out of the way for tear-off and installation. The removal process involves disconnecting the electrical connections, removing the panels from the racking, removing the racking and mounting attachments from the roof, and then reinstalling everything after the new roof is installed. This work should be performed by qualified solar technicians, not by roofing crews who may not be familiar with solar equipment. The cost of removal and reinstallation should be factored into the total project cost. Some roofing contractors offer integrated solar removal/reinstallation services; others coordinate with a separate solar company.
Why It Matters
Proper removal and reinstallation of solar panels by qualified technicians protects the solar investment and ensures the new roof is properly installed.