how much of a solar panel system is the cost of panels?
Solar panel costs explained. What you'll pay for solar panels varies by your state and the size of the solar panel system. Simply put, the more energy you want to generate, the more solar equipment you'll need to get. But on average, solar panels will cost you $3.70 per watt. This means the average-size 5-kilowatt solar system would run about $18,500.