Solar Panel Costs by State

StateCost/Watt6kW After CreditPayback
Arizona$2.25$9,4505-7 yrs
California$2.80$11,7605-7 yrs
Colorado$2.60$10,9207-9 yrs
Florida$2.40$10,0808-10 yrs
Massachusetts$3.10$13,0205-7 yrs
New Jersey$2.75$11,5506-8 yrs
New York$3.00$12,6006-8 yrs
Texas$2.30$9,6608-11 yrs

Why payback varies so much

States with high electricity rates (CA, MA, NY) have faster payback despite higher install costs. States with cheap electricity (TX, FL) take longer to recoup even though installation is cheaper.