Solar Panel Cost by State
Average solar installation costs and incentives for a typical 6 kW system by state (2025 data).
| State ↕ | Avg Rate (¢/kWh) ↕ | Cost/Watt ↕ | 6 kW System ↕ | After Incentives ↕ | Net Metering |
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System cost estimates based on NREL 2025 data. After-incentives cost applies 30% federal ITC plus any state incentives shown. Actual quotes vary by installer.
Why Solar Costs So Much More in Some States
Solar installation costs range from $2.50/watt in Arizona to $4.20/watt in Connecticut — a $8,750 difference on a 10 kW system before incentives. Labor costs, permit fees, and local utility interconnection requirements drive most of the variation. Installer competition matters too: states with 10+ installers average 15% lower prices than markets with only 2–3 options.
The national average for solar installation is about $2.85–$3.00 per watt, which puts a 6 kW system at $17,100–$18,000 before incentives. That's the average. The actual spread runs from $2.65/W in Arizona to $3.50/W in Hawaii. A $0.85/W difference across a 6 kW system is $5,100. That's real money.
Labor markets explain most of it. States with higher prevailing wages (New England, Hawaii, New York) have higher installation costs even when hardware prices are similar. Connecticut's $3.40/W average reflects Boston-area contractor rates bleeding south, combined with more complex roof structures in older housing stock. Arizona's $2.65/W reflects a large, competitive solar market with efficient installer density and straightforward single-story roofs on newer homes.
Hardware is largely the same everywhere. Solar panels are a commodity. A 400W panel from a major manufacturer costs roughly the same whether it ends up in Dallas or Denver. The cost difference is permits, labor, and racking. Permits cost $150–$800 depending on the municipality. Electrical upgrades add $500–$2,000 if your panel needs an upgrade to handle solar production. These fixed costs hit harder on smaller systems.
The "after incentives" column in the table applies the 30% federal ITC plus any state credits. It does not apply net metering savings or local utility rebates, which are not upfront discounts but ongoing credits. Several utilities in Colorado, Wisconsin, and Oregon offer $500–$1,000 rebates that would further reduce net cost beyond what this table shows.
System sizing for this table is fixed at 6 kW, which covers roughly 650–750 kWh/month of production in a state with 5 peak sun hours. If your monthly bill implies higher consumption, scale accordingly. Every additional kilowatt of capacity adds roughly $2.85–$3.10 in installed cost, so a 10 kW system in a middle-cost state runs about $28,500–$30,000 before the federal credit.
Per-watt installation costs from NREL's Q4 2025 Solar Industry Update. Electricity rates from EIA Electric Power Monthly (2025 annual state averages).