The average solar panel used in residential installations is approximately 2m long and 1m wide, meaning a surface area of 2m², and is about 4cm thick. This makes them compact enough to fit on most UK rooftops while still providing significant output. 6 inches thick, weighs 40–55 lb, and produces 350–460 watts. Portable 100 W panels are about 42 × 21 inches. The full size-by-wattage. Standard Residential Panels Optimize Space and Handling: The industry-standard 60-cell panel dimensions (65″ × 39″ × 1. 6 to 2 square metres per panel.