How big is a solar panel?Post author:freedomtask2Post published:January 15, 2020Post category:FAQThe average size of most panels for rooftop solar installation is about 65″(5.4 ft) by 39″(3.25ft) You Might Also Like Can solar power charge an electric car? January 15, 2020 Will solar power take over? January 15, 2020 Can solar power run an air conditioner? January 15, 2020