{"$G":{"aK":"What do solar panels cost in Gretna, LA?","aL":"In Gretna, LA, the mean cost per watt for solar panels as recorded in August, 2025 is $3.46/W. Post federal tax credit, a 5 kW solar panel system installation in Gretna, LA will roughly cost $12,110.","aM":"b"},"aN":"ai"}