{"$H":{"ax":"What do solar panels cost in St. Louis County, MO?","ay":"As of August, 2025, the average per-watt cost for solar panels in St. Louis County, MO is $3.56/W. With the federal tax credit, the cost of a 5 kW solar panel system in St. Louis County, MO drops to roughly $12,460.","az":"b"},"aA":"aq"}