In 2026, residential solar in the US costs roughly $3.00 per watt installed before incentives, or about $2.10 per watt after the 30% federal tax credit. For a typical home, that works out to a total of $15,000–$25,000 before incentives and $10,500–$17,500 after the credit. Here’s how that breaks down.
Cost per watt is the number that matters
Solar pricing is quoted in dollars per watt because it lets you compare systems of different sizes fairly. The national average gross price sits around $3.00/W in 2026, though it ranges from about $2.50/W in competitive markets to $3.50/W in less mature ones.
A “watt” here refers to system capacity. A 7,000-watt (7 kW) system at $3.00/W costs $21,000 before incentives.
Total cost by system size
| System size | Gross cost (~$3/W) | After 30% credit | Fits a home using… |
|---|---|---|---|
| 5 kW | $15,000 | $10,500 | ~600 kWh/month |
| 7 kW | $21,000 | $14,700 | ~850 kWh/month |
| 10 kW | $30,000 | $21,000 | ~1,200 kWh/month |
| 12 kW | $36,000 | $25,200 | ~1,450 kWh/month |
Most US homes land in the 6–10 kW range. The right size for you depends on your electricity usage and how much of it you want to offset — our calculator sizes this automatically from your monthly bill.
What’s included in that price
The per-watt cost bundles together:
- Panels (~25–30% of cost)
- Inverter that converts DC to usable AC (~10%)
- Racking and mounting hardware (~10%)
- Labor and installation (~10–15%)
- Permitting, inspection, and interconnection (~10%)
- Sales, marketing, and overhead (~20–25%)
That last bucket is why getting multiple quotes matters — a big chunk of the price is soft costs that vary a lot between installers.
Add-ons that change the price
Battery storage (like a home backup battery) typically adds $10,000–$15,000 before incentives. Batteries qualify for the same 30% federal credit. They’re worth it mainly if you have frequent outages or your utility has poor net-metering rules.
Main panel upgrades, ground mounts, steep or complex roofs, and tree removal can each add to the bottom line.
The 30% federal tax credit
The federal Investment Tax Credit reduces your federal tax bill by 30% of the total system cost — including batteries and installation — through 2032. It’s a credit, not a deduction, so it’s a dollar-for-dollar reduction. On a $24,000 system, that’s $7,200 back. Read our full guide to the credit.
How to pay less
- Get at least three quotes. Prices for the same system can vary 20–30%.
- Don’t over-buy battery storage unless you have a clear need.
- Check state and utility incentives on top of the federal credit — some states add thousands.
- Be skeptical of high-pressure sales. A good installer will give you a written quote with the equipment specs and let you think it over.
Bottom line
Budget around $3.00/W gross and $2.10/W after the federal credit for 2026 planning. For most homes that’s a $14,000–$18,000 net investment that pays for itself in roughly 6–10 years. Use the savings calculator to see the payback for your specific bill and state.
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