These panels come in a standard size, which is approximately 1650 x 990 mm (65 x 39 inches). They are smaller in size and lighter in weight compared to commercial solar panels. 6 inches thick, weighs 40–55 lb, and produces 350–460 watts. The number of cells in a panel is most commonly 60, 72 or 96, which directly impact its overall. 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. Meanwhile, the average solar panel weighs. 940kW Solar System Information - Facts & Figures.