Solar Cost Per Watt (2026)
| System size | Typical cost at $2.25–$3.30/W | Covers (approx.) |
|---|---|---|
| 6 kW | $13,500–$19,800 | Small home / low usage |
| 8 kW | $18,000–$26,400 | Average US home |
| 10 kW | $22,500–$33,000 | Large home / EV charging |
National figures from published 2026 state cost guides. Price per watt falls as system size rises.
What the $/W Includes
- Panels, inverter(s), racking, wiring
- Labor, permitting, inspection, interconnection fees
- Installer overhead and margin (often 20–30% of the total — this is why quotes vary so much)
The 2026 Tax-Credit Reality (Read Before You Sign)
Owned system installed in 2026: $0 federal credit. The Residential Clean Energy Credit (§25D, 30%) was terminated by the One Big Beautiful Bill Act (P.L. 119-21) for systems placed in service after December 31, 2025. The IRS is explicit: even paying in 2025 doesn’t help if installation finished in 2026.
The one exception — leases and PPAs. The commercial credit (§48E, 30%) survives through ~2027 and belongs to the system owner. With a lease/PPA, the company claims it and passes savings to you as a lower monthly payment. You don’t get a tax credit; you get cheaper solar.
If anyone quotes you “30% federal credit” on a 2026 purchase, they are out of date or hoping you are. Ask which code section they mean: §25D is dead for 2026 owned systems; §48E is the business credit.
What’s still alive: state tax credits, utility rebates, net metering (state-dependent), and property-tax exemptions for added home value in many states. Check DSIRE for your state.
Payback Math in 2026 (No Federal Credit)
| Scenario | Typical payback |
|---|---|
| High electric rates ($0.25+/kWh) + good sun + net metering | 6–9 years |
| Average rates ($0.15–$0.20/kWh) | 8–12 years |
| Low rates + poor net metering | 12–18 years |
Payback = system cost ÷ annual electric-bill savings. Without the credit, your local electricity rate matters more than ever.
5 Ways to Pay Less
- Get 3+ quotes. Same equipment, 20–40% price spreads are normal.
- Ask for cash price vs. financed price. Dealer fees on solar loans quietly add 15–30%.
- Consider the right size, not the max size. Oversizing past your usage rarely pays.
- Stack state/utility incentives first — some beat the old federal credit in generous states.
- Price a lease/PPA separately — with §48E still alive for leased systems through ~2027, the monthly-payment math can beat buying in 2026.
Sources & methodology
Per-watt figures from published 2026 state cost guides (Story of Solar 50-state guide, Sept 2026). Tax-credit status per IRS FS-2025-05 and OBBBA (P.L. 119-21). Planning figures, not quotes.
Disclaimer: 2026 US national averages. Tax info is general, not tax advice. Get 3 written local quotes.