{"$N":{"av":"What do solar panels cost in Fairfax County, VA?","aw":"The cost per watt for solar panels in Fairfax County, VA during August of 2025 averages $3.4/W. For a 5 kW solar panel system, the total cost in Fairfax County, VA after federal tax credits is around $11,900.","ax":"c"},"ay":"an"}