Solar panels can range anywhere from $8,500 to $30,500. The average lies around $12,700 for a 6kW solar system. This number though can heavily change depending on the material of you want to use. Thin-Film solar panels are not only the cheapest, but also the best for the enviroment. Polycrystalline solar panels are the second cheapest, only around 40 cents per watt more than thin-film solar pannels, but they are less efficient than their counterparts at producing energy. Lastly, there is monocrystalline solar panels. These are the most expensive, but also the most efficient at producing energy. You can find how much you can save by getting solar panels based off the average electicity price and usage in your state at forbes.com
