Most solar companies set the price according to the solar system's wattage. A solar installation's “cost per watt” is a little like the “price per square foot” when you buy a house.

Solar panels can save money on electric bills, but a solar panel system requires a steep upfront investment — $30,000 for the average system including installation ...

Solar panels could reduce your bills and even earn money by generating electricity you can sell back to your energy company. But the average solar panel system of 3.5kWp will cost around £7,000 to ...