How Much Does a Solar Installer Charge Per Watt in the USA? (2026)
In 2026, US residential solar installers charge $2.50-$4.00 per watt installed before the 30% federal tax credit. After the ITC, the effective customer cost is $1.75-$2.80/W.
What Affects the Per-Watt Price
System size: Larger systems have lower per-watt costs due to economies of scale. A 3kW system might cost $3.80/W; a 12kW system might cost $2.80/W.
Equipment tier: SunPower X-Series or Panasonic HIT panels cost more than economy brands. Enphase microinverters cost more than string inverters but are often worth it for complex roofs.
State/market: California, Massachusetts, and New York markets have higher installed costs than Texas, Arizona, and Carolinas – driven by higher labor costs, permit fees, and market pricing.
Installation complexity: Steep roofs, multiple roof planes, ground mounts, and long conduit runs all increase labor cost.
2026 Regional Pricing (Installed, Before ITC)
| State | Average installed price/W |
|---|---|
| California | $3.00-$4.20 |
| Massachusetts | $3.20-$4.50 |
| Texas | $2.50-$3.50 |
| Florida | $2.60-$3.60 |
| Arizona | $2.50-$3.40 |
| New York | $3.00-$4.20 |
Source: EnergySage Solar Marketplace, NREL, 2026.
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FAQs
What is the average system size in the USA?
The average US residential solar installation is 6-8 kW. At $3.00/W installed, a 7kW system costs $21,000 gross ($14,700 after 30% ITC).
How do I know if a solar quote is reasonable?
Compare against the ranges above for your state. Very cheap quotes ($2.00/W or below in high-cost markets) may use economy panels, skip permit fees, or cut safety corners. Very expensive quotes ($4.50+/W for standard residential) need to be justified by premium equipment or complex installation.
CoreQuote is a quoting and invoicing app for US tradespeople. Try free for 6 months at kwowta.com.
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