39 x 66 3 25 feet x 5 5 feet 72 cell panels.
													
																	Solar panel size in feet. 
									
	
		
	
																	Medium efficiency panels sq. 
																	The average size of solar panels used in a rooftop solar installation is approximately 65 inches by 39 inches or 5 4 feet by 3 25 feet. 
																	A number of larger consumer products or add ons can significantly change your annual. 
																	There is some variation from brand to brand and if you re installing a large scale solar panel system such as for a warehouse or a municipal building your panels will be closer to 6 feet long. 
															
													
									
	
		
	
																	Perhaps one of the most difficult aspects of sizing a solar panel system is estimating annual energy usage for your household. 
																	The depth of a solar panel may be anywhere between 1 and 2 inches and depends mainly on the frame thickness. 
																	Speaking of commercial systems that have a comparatively much larger number of panels the size is normally 77 by 39 inches or 6 4 feet by 3 25 feet. 
																	Usually these are 65 inches by 39 inches or 5 4 feet by 3 25 feet.