Residential solar panels weigh about 2. Mounting equipment adds an average of 4. 5 pounds per square foot to the total weight of a solar panel installation. . Alright, here are 6 sampled solar panels with the wattages, dimensions, total weight, and weight per square foot (weight per square foot is calculated by dividing the total weight by solar panel roof area): As we can see, 100W solar panels weigh about 10-15 lbs, 200W solar panels about 20-30 lbs. . Generally, standard residential photovoltaic panels weigh between 40 and 50 pounds (about 18 to 22 kilograms). Why is knowing the photovoltaic panels weight so important before installation? This weight is. . Every solar panel consists of solar cells, which are typically 6-by-6 inches. However, the exact dimensions depend heavily on the panel's technology, wattage, and the manufacturer's design.