The average installed cost of residential solar in 2026 is about $2.60 to $3.30 per watt before incentives, but the range across states runs from roughly $2.30 in the cheapest markets to $4.00 in the most expensive. On an 8 kW system, that gap is worth up to $13,600.
This guide shows the typical price per watt in 22 key states, explains why prices vary so much and tells you how to use the number to compare quotes without getting misled.
Key takeaways
- Price per watt is the fastest way to compare solar quotes. Divide the total system price by the system size in watts.
- Arizona and Texas are among the cheapest states at about $2.30–$2.90 per watt. Hawaii and Massachusetts are among the most expensive at $3.10–$4.00.
- Cheaper per watt does not always mean a better deal. Electricity rates and net metering rules decide how much each watt is worth.
- With the 30 % federal tax credit gone for 2026 installations, state and local incentives matter more for lowering your net cost.
- Smaller systems cost more per watt. Systems under 5 kW often run $0.20–$0.50 per watt higher than 10 kW systems.
- Always compare at least three quotes. Prices for the same system can differ by 15–30 % within one city.
What cost per watt means
Solar installers price systems by the watt. The cost per watt, often written as $/W, is the total installed price divided by the system’s capacity in watts.
Formula: Cost per watt = total system price ÷ system size in watts
Example: An 8 kW system priced at $22,000 is 8,000 watts, so the cost is $22,000 ÷ 8,000 = $2.75 per watt.
It works in reverse too. If a state averages $2.90 per watt and you need a 7 kW system, your estimated price is 7,000 × $2.90 = $20,300.
Two details matter when you compare quotes:
- Gross vs. net price. Gross is the price before incentives; net is after. In 2026 there is no federal credit for homeowners who buy, so net and gross prices differ only by state or local incentives.
- DC watts vs. AC watts. Most quotes use the DC rating of the panels. An inverter rating (AC) can be lower. Make sure every quote uses the same basis.
Solar cost per watt by state in 2026
These ranges are estimates for installed residential systems before any incentives. They exclude batteries and major roof or electrical work. Use them as a guide, not as a quote.
| State | Typical cost per watt | Estimated cost of an 8 kW system |
|---|---|---|
| Arizona | $2.30–$2.90 | $18,400–$23,200 |
| Texas | $2.30–$2.90 | $18,400–$23,200 |
| Nevada | $2.40–$3.00 | $19,200–$24,000 |
| Florida | $2.40–$3.00 | $19,200–$24,000 |
| Georgia | $2.50–$3.10 | $20,000–$24,800 |
| North Carolina | $2.50–$3.10 | $20,000–$24,800 |
| South Carolina | $2.50–$3.10 | $20,000–$24,800 |
| Utah | $2.50–$3.10 | $20,000–$24,800 |
| Colorado | $2.60–$3.30 | $20,800–$26,400 |
| Illinois | $2.60–$3.30 | $20,800–$26,400 |
| Virginia | $2.60–$3.30 | $20,800–$26,400 |
| Ohio | $2.60–$3.20 | $20,800–$25,600 |
| Michigan | $2.70–$3.30 | $21,600–$26,400 |
| Pennsylvania | $2.70–$3.40 | $21,600–$27,200 |
| California | $2.80–$3.50 | $22,400–$28,000 |
| Washington | $2.80–$3.50 | $22,400–$28,000 |
| Oregon | $2.80–$3.50 | $22,400–$28,000 |
| New Jersey | $2.90–$3.60 | $23,200–$28,800 |
| New York | $3.00–$3.80 | $24,000–$30,400 |
| Connecticut | $3.00–$3.80 | $24,000–$30,400 |
| Massachusetts | $3.10–$3.90 | $24,800–$31,200 |
| Hawaii | $3.20–$4.00 | $25,600–$32,000 |
Cheapest states for solar per watt
The lowest prices are usually found in the Southwest and Southeast: Arizona, Texas, Nevada and Florida. These markets have many installers competing for customers, large volumes that lower installation costs, simple permitting in many jurisdictions and mostly unshaded, easy-to-work-on roofs.
Most expensive states for solar per watt
The highest prices tend to appear in Hawaii, Massachusetts, New York and Connecticut. Higher labor rates, complex permitting, snow-load and structural requirements, older housing with steep or multi-plane roofs, and the extra cost of shipping and logistics all push prices up.
Why solar prices vary so much by state
Labor and overhead
Installation labor makes up a significant part of the price. States with high wages and high business costs show higher prices per watt.
Permitting and interconnection
Some cities approve permits within days and charge modest fees. Others require lengthy reviews, multiple inspections and costly utility applications. These «soft costs» can add hundreds or even thousands of dollars.
Market competition
Where many installers compete, prices fall and quality rises. In smaller or rural markets, fewer options mean less price pressure.
Roof types and building codes
Tile roofs, steep slopes, complex rooflines, snow loads and hurricane wind codes all affect labor and equipment. Florida and the Gulf Coast need hurricane-rated racking; northern states need systems rated for snow.
Sales and customer acquisition costs
A large share of the price in many markets goes to sales and marketing. Door-to-door and lead-generation models carry higher costs than referral-based local installers.
Equipment choices
Premium panels, microinverters, optimizers and extra monitoring raise the price per watt. A standard panel with a string inverter is generally the cheapest setup.
Cost per watt is not the whole story
A low price per watt matters only if the system produces savings. Three things decide that: your electricity rate, your utility’s net metering policy and the sunshine at your location.
| State | Typical cost per watt | Approx. residential electricity rate | What it means |
|---|---|---|---|
| Texas | $2.30–$2.90 | 14–16 ¢/kWh | Cheap system, but low rates stretch payback |
| Arizona | $2.30–$2.90 | 14–16 ¢/kWh | Cheap system and strong sun; export credits are modest |
| Florida | $2.40–$3.00 | 14–17 ¢/kWh | Good sun, moderate rates, limited net metering |
| California | $2.80–$3.50 | 30–35 ¢/kWh | Higher rates, but weaker export credits under NEM 3.0 |
| New York | $3.00–$3.80 | 24–28 ¢/kWh | Expensive system, high rates, solid incentives |
| Massachusetts | $3.10–$3.90 | 30–34 ¢/kWh | Highest prices, but also very high rates and strong incentives |
Electricity rates are approximate and change over time. The lesson is that Massachusetts homeowners pay about 30 % more per watt than Texas homeowners, but each watt saves them more than twice as much on the utility bill. Compare the price per watt together with your electricity rate.
How system size changes the cost per watt
Fixed costs such as design, permitting, inspection and travel do not grow in proportion with the number of panels. That is why price per watt usually drops as the system grows.
| System size | Typical effect on price per watt |
|---|---|
| Under 5 kW | Highest price per watt, often $0.20–$0.50 above a 10 kW system |
| 6–8 kW | Near the market average |
| 10–12 kW | Lower price per watt in most markets |
| Above 12 kW | Lowest, but only worth it if you use the power |
Don’t buy a larger system just to lower the price per watt. If your utility pays little for exported power, extra capacity you can’t use won’t pay for itself.
Price per watt after incentives
Without the federal credit, net cost per watt equals the gross price minus state and local incentives, divided by the system size.
Example: An 8 kW system costs $25,000. A state rebate gives $2,000. The net cost is $23,000, or $2.88 per watt.
Many states still offer help that lowers the effective price per watt:
- Direct rebates or state income tax credits
- Property tax exemptions for the added home value
- Sales tax exemptions on equipment
- Utility rebates and performance payments
- Solar renewable energy certificates (SRECs) in some states
Check the DSIRE database (dsireusa.org) and your utility’s website. Ask each installer to list which incentives are included in the quote and who handles the paperwork.
How to get a lower price per watt
- Get at least three quotes. Include a local installer and a national company. Compare the price per watt on the same basis.
- Ask for an itemized quote. It should show equipment, labor, permits, interconnection and any extras.
- Choose standard equipment. Mid-range panels with strong warranties often deliver the best value.
- Size the system to your usage. Avoid paying for capacity you can’t use.
- Use state and local incentives. They may reduce the net price by thousands of dollars.
- Avoid inflated financing. A loan with dealer fees can raise the real cost per watt by 10–30 %.
- Be flexible on timing. Installers sometimes discount during slower seasons.
Red flags in a solar quote
- A price far below the range for your state. It may leave out permits, electrical work or warranties.
- A price far above the range with no clear reason, such as premium equipment or a difficult roof.
- Pressure to sign on the same day.
- A quote that shows only a monthly payment and no total price.
- Missing equipment brands or model numbers.
- A promise of «free solar.» Someone always pays for it.
Frequently asked questions
What is a good price per watt for solar in 2026?
A good price is at or below the middle of your state’s range. For many states, that means roughly $2.60 to $3.00 per watt for a mid-sized system with quality equipment. Prices under $2.40 per watt in most states deserve a careful look at what is included.
Which state has the cheapest solar?
Arizona and Texas are generally among the cheapest at around $2.30–$2.90 per watt. The cheapest state per watt isn’t always the best financial choice, because low electricity rates can lengthen payback.
Why is solar so expensive in the Northeast?
Higher labor costs, complex permitting, older homes with difficult roofs and less installer competition push prices up. High electricity rates and generous incentives often offset part of that.
Is cost per watt the best way to compare solar quotes?
It is the best first filter, but not the only one. Also compare equipment quality, warranties, installer reputation, the production estimate and the total price.
Do prices vary within the same state?
Yes. Urban and suburban areas with many installers often cost less than rural areas. Differences between installers in the same city can reach 15–30 %.
Bottom line
Solar prices in 2026 range from about $2.30 to $4.00 per watt, depending on the state, system size, equipment and installer. Use the table above to see whether a quote is in line with your market, then compare the price per watt with your electricity rate, net metering rules and available incentives before you decide.
The next step is simple: request three itemized quotes, calculate the price per watt for each and check your state’s incentives.