The average cost of installing solar panels on a house in the US can vary significantly based on system size, location, and incentives, but typically ranges from $24,000 to $36,000 before applying the federal tax credit. For a standard three-bedroom home requiring a 15,900 kilowatt-hour (kWh) system (18-34 panels), the average cost is around $24,222 after considering federal tax credits. On a per-watt basis, costs generally fall between $2.50 and $3.50, with many sources citing an average around $2.75 to $3.00 per watt. It’s important to note that state and local incentives can further reduce the overall out-of-pocket expense.
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