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Average system costs = $95 per square foot. Average solar panel output = 10.6 watts per square foot. Average solar energy system costs = $8.95 per watt. In order to compare the solar energy costs to conventional hydrocarbon fuels, we must covert the $8.95 per into KWH.
generally solar pv systems that generate electricity from sunlight cost between $ 2 50 to $ 7 per installed watt typically the larger the system the lower price per watt large commercial systems are typically well below $ 4 per watt