Cost Of Solar Panels By State: Average Prices Per Watt (2026)

Why Solar Costs Vary by State

Five factors drive the state-by-state price differences:

Labor rates. Installation labor is the single largest variable cost component, representing 15–25% of the total system price. States with higher prevailing wages (New York, California, Massachusetts, Connecticut) pass those costs through. In Texas and Arizona, lower labor costs translate directly to lower $/W pricing.

Permitting complexity. Some states and municipalities have streamlined solar permitting to a simple online application processed in days. Others require structural engineering reviews, multiple inspections, utility interconnection studies, and weeks of processing time. Every hour of administrative work adds to the installer's cost — and your price.

Market competition. States with mature solar markets (California, Texas, Arizona, Florida) have dozens of competing installers. Competition compresses margins and drives prices toward the floor. In states with fewer installers, less competition means higher margins.

Sales tax treatment. Some states fully exempt solar equipment from sales tax (Arizona, New Jersey, New York, Massachusetts, and others). In states that charge sales tax on solar, it adds 4–8% to the equipment cost.

Logistics and geography. Hawaii faces shipping surcharges on all equipment. Alaska has extreme logistics costs and a short installation season. Even within the continental US, rural areas in any state tend to cost more due to longer installer travel times.

All 50 States: Solar Cost, Rate, and Payback

Solar production varies dramatically by location. The NREL irradiance map below shows why — the Southwest receives nearly twice the annual sunlight as the Pacific Northwest. This directly affects payback periods.

The table below shows installed cost per watt, the cost of a 5 kW system before and after the 30% federal ITC, the average residential electricity rate, and an estimated payback period. Payback estimates use each state's average peak sun hours with a 0.83 PVWatts derate factor.

Data sources: NREL Q1 2024 cost benchmarks, EIA 2024 average residential rates, PVWatts v8 production estimates with 0.83 derate factor.

10 Cheapest States for Solar Installation

These states offer the lowest per-watt installed costs, driven by installer competition, favorable permitting, and lower labor costs:

Note that cheapest installation does not always mean best value. Arizona at $2.50/W with $0.14/kWh electricity has an 8-year payback, while Arkansas at $2.70/W with $0.11/kWh electricity has a 14-year payback.

10 Most Expensive States for Solar Installation

Higher costs in these states are driven by complex permitting, high labor rates, and in some cases, limited installer competition:

Despite higher installation costs, many of these states deliver the best payback because electricity rates are also high. Massachusetts at $3.10/W but $0.28/kWh achieves a 6-year payback — faster than Texas at $2.50/W but $0.13/kWh (10-year payback).

States with the Best Incentives

The federal 30% ITC applies nationwide, but these states add significant extra value:

New York — NY-Sun Program

Residential rebates up to $0.20/W through NYSERDA. For a 5 kW system, that is up to $1,000 on top of the federal credit. Combined with high electricity rates ($0.24/kWh), New York is one of the best states for solar ROI despite above-average installation costs.

Massachusetts — SMART Program

The Solar Massachusetts Renewable Target program pays performance-based incentives of $0.03–$0.06 per kWh produced over 10 years. For a 5 kW system producing 6,500 kWh/year, that adds $195–$390/year in additional income on top of electricity savings.

New Jersey — TRECs

Transition Renewable Energy Certificates are earned for every MWh of solar production and can be sold for $0.04–$0.06/kWh. A 5 kW system generating 6,800 kWh/year earns $272–$408/year in TREC income.

Illinois — SRECs

Illinois Solar Renewable Energy Credits are worth $60–$80 each (1 per MWh produced). A 5 kW system producing 6,500 kWh/year earns 6.5 SRECs annually, worth $390–$520.

Connecticut — RSIP

The Residential Solar Investment Program provides performance-based incentives that vary by utility territory. The program has been one of the most successful state solar programs in the US.

Maryland — State Tax Credit

Maryland offers a state income tax credit of up to $1,000 for residential solar installations, stacking with the federal credit.

California — NEM 3.0

While not a rebate, California's net metering policy (NEM 3.0, effective April 2023) still provides value for solar production, though at reduced export rates compared to the previous NEM 2.0 program. The extremely high electricity rate ($0.25/kWh) means solar still pencils out well, especially when paired with battery storage.

How to Evaluate Solar Value in Your State

The installed cost per watt is just one variable. To determine whether solar is a good investment in your state, evaluate all three factors together:

1. Net cost after all incentives

Start with the installed cost, subtract the 30% federal ITC, then subtract any state rebates, tax credits, or SRECs. This is your true out-of-pocket cost.

2. Annual production value

Multiply your expected annual production (use PVWatts for your specific address) by your electricity rate. If your state has SRECs or performance incentives, add that income.

3. Simple payback

Divide net cost by annual production value. Under 8 years is excellent. 8–12 years is good. Over 12 years means the financial case is weaker (though still positive over the 25-year panel life).

Example — Massachusetts vs. Texas:

Massachusetts costs more to install but delivers almost twice the annual value, resulting in a payback period under half that of Texas. This is why installed cost alone is a misleading metric.

How to Get the Best Solar Quote in Your State

Use comparison platforms. EnergySage, SolarReviews, and similar platforms let you compare multiple installer quotes side by side. Always get at least three quotes before committing.

Compare on a $/W basis. This normalizes across system sizes and makes quotes directly comparable. Ask each installer for the total installed cost divided by the system's DC wattage.

Check installer credentials. Look for NABCEP-certified installers, verify their state contractor's license, and check reviews on Google and the Better Business Bureau. A slightly higher price from a reputable installer is usually worth it for warranty support.

Understand the equipment. Not all $2.80/W quotes are equal. Compare panel brand and warranty (25 vs. 30 years), inverter type (string vs. microinverter), and what is included in the monitoring package.

Ask about financing. Many installers offer $0-down solar loans at 4–7% APR. Compare the total cost of financing (principal + interest over the loan term) to the total electricity savings over the same period. In most states with payback under 10 years, the monthly loan payment is lower than the electricity savings from day one.

Verify net metering terms. Before signing, confirm your utility's net metering policy. The installer should handle the interconnection application, but you should understand the terms — particularly the credit rate for exported power and any caps on system size.

Keep Reading

• Cost Of A 5 kW Solar System
• Cost Of A 10 kW Solar System
• Solar Panel Cost Per Watt
• Solar Payback Period Calculator
• Solar Tax Credit Calculator
• Net Metering By State
• Average Peak Sun Hours By State