The cost of a 5-kilowatt solar energy system typically ranges between 12,000 and 18,000 USD, depending on several factors, including location and installation specifics. 1. Installation costs are a significant portion of the overall expenses, often constituting up to 30% of the total budget. This. . Solar panel installation costs a national average of $18,180 for a 6kW solar panel system for a 1,500 square ft. home. The price per watt for solar panels can range from $2.50 to $3.50 and largely depends on the home's geographical area. Residential solar panels are usually sized between 3 kW and 8.
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