How Much Do Solar Panels Cost in 2026? US Prices by System Size
How much do solar panels cost in 2026?
A residential solar system in the United States averages about $3.00 per watt installed before incentives, according to tracking from SEIA/Wood Mackenzie. For the most common home sizes that means roughly $21,000–$30,000 gross for a 7–10 kW system. After the 30% federal tax credit, the net cost drops to about $15,000–$21,000.
That price buys a complete, installed system — not just the panels. Below is how the cost breaks down by system size, what's included, and what pushes your quote up or down.
Solar cost by system size
System size is the single biggest driver of price. At ~$3.00/W gross and the 30% credit, here's what typical sizes run:
| System size | Gross cost | Net after 30% credit |
|---|---|---|
| 3 kW | ~$9,000 | ~$6,300 |
| 6 kW | ~$18,000 | ~$12,600 |
| 10 kW | ~$30,000 | ~$21,000 |
The chart below shows net cost (after the federal credit) by system size.
Illustrative, based on a ~$3.00/W installed price before the 30% Residential Clean Energy Credit.
| System size | Net cost (USD) |
|---|---|
| 3 kW | 6,300 USD |
| 6 kW | 12,600 USD |
| 10 kW | 21,000 USD |
Source: SEIA / Wood Mackenzie — Solar Industry Research Data
Larger systems cost more in absolute terms but often less per watt, because fixed costs (permits, design, a single truck roll) spread across more panels.
What's included in the price?
A turnkey quote bundles several line items:
- Panels — roughly 25–30% of the total.
- Inverter (string or microinverters) — about 10–15%.
- Racking and mounting hardware.
- Labor and installation.
- Permitting, inspection and interconnection with your utility.
- Installer overhead, design and warranty.
This is why "panel-only" prices you see online are misleading: the hardware is a minority of the installed cost.
What affects the price?
Two identical-size systems can be quoted very differently. The main factors:
- Panel and inverter tier — premium high-efficiency panels cost more per watt but fit more power on a small roof.
- Roof complexity — steep pitches, multiple planes, tile roofs, or extra electrical work raise labor.
- Location — local labor rates, permitting fees and competition vary widely by state.
- Installer — national brands often price higher than vetted local installers for the same equipment.
Getting at least three quotes is the simplest way to avoid overpaying.
How the federal tax credit lowers your cost
The Residential Clean Energy Credit returns 30% of your total system cost as a credit against your federal income tax, for systems placed in service through 2032 under current law. On a $24,000 system that's a $7,200 reduction. It is a tax credit, not a rebate, so you need sufficient tax liability to use it (it can roll forward). Confirm the current rate and rules in the DOE homeowner's guide before signing.
Some states and utilities add their own rebates or performance payments on top, further lowering net cost.
Are solar prices still falling?
Yes, over the long run. Module prices have dropped dramatically over the past decade, and NREL benchmarks show installed residential costs trending down as the market matures, even as soft costs (labor, permitting) prove stickier. Waiting rarely pays, though: every year you delay is a year of electricity bills you could have offset.
Does adding a battery change the cost?
A home battery is the most common way to push the price up. A typical 10–13 kWh battery adds roughly $8,000–$12,000 before incentives. The good news: the 30% federal credit also applies to standalone storage, so a $10,000 battery effectively costs about $7,000 net. A battery is worth it mainly if you have frequent outages or your utility pays little for exported power; if you have full retail net metering and a stable grid, a battery lengthens payback without adding much savings.
Cash, loan, or lease — how financing changes the cost
How you pay changes the lifetime cost more than the sticker price:
- Cash — lowest total cost, you keep the full tax credit, fastest payback.
- Solar loan — preserves the tax credit and ownership; interest adds to lifetime cost but you avoid a large upfront outlay. Watch for "dealer fees" baked into low-rate loans.
- Lease / PPA — little or no upfront cost, but the installer keeps the tax credit and you pay for the power for 20–25 years, so lifetime savings are much smaller. Leases can also complicate a home sale.
For most owner-occupiers, cash or a transparent loan beats a lease.
Frequently asked questions
Why are online "panel only" prices so much lower? Those quote just the modules, which are a minority of an installed system. The full price includes inverter, racking, labor, permits and warranty.
Does system size change the price per watt? Yes — larger systems usually cost less per watt because fixed costs (design, permits, a single install visit) spread across more panels.
Is the 30% tax credit a rebate? No. It's a credit against your federal income tax, so you need enough tax liability to use it; unused amounts can roll forward.
The bottom line
Budget around $3.00 per watt before incentives, then subtract 30% for the federal credit to estimate your net cost. Size the system to your actual electricity use, get three itemized quotes, and compare a cash or loan price against any lease. For whether the investment pays off over time, see our guide on whether solar is worth it.
Last updated: June 2026. This article is informational and is not personalized financial or tax advice; confirm current prices and incentives with licensed professionals.