The average cost of solar installation in the U.S. ranges from $2.50 to $3.50 per watt, depending on the region and panel efficiency. A typical residential solar system, sized around 6 kilowatts, can cost between $15,000 and $21,000 after incentives. Installation expenses include solar panels, inverters, mounting hardware, labor, and permitting fees. While regional differences in labo... https://solarsme.com/solar-panel-cost/