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 What’s the difference between solar photovoltaic and solar hot water systems? January 15, 2020 Can solar power charge an electric car? January 15, 2020 What can affect the amount of solar energy received? January 15, 2020