Solar Cost per Watt: What You Will Pay in 2026
Written by HyreSolar Research Desk Price compilation from published, dated sources
The short answer
Solar Cost per Watt depends mainly on system size, equipment and roof, and this page gives the installed range from dated, sourced quotes. The 21 published figures we retrieved on October 21, 2026 put residential systems at $2.58/W–$3.36/W before incentives.
Cost per watt is the gross system price divided by its DC size in watts: a $21,000 system at 7,000 W is $3.00/W (worked arithmetic, not a price). No 30% federal credit applies to a system a homeowner buys: Section 25D ended for expenditures after December 31, 2025 (what changed).
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Keep learningInstalled price range (21 quotes, dated)
Installed price per watt: $2.58/W–$3.36/W, the median low to the median high across the 21 comparable published figures below. The full spread runs from $2.20/W to $4.00/W.
| Source | Published figure | Basis | Source date | Retrieved |
|---|---|---|---|---|
| EnergySage | $2.60/W | EnergySage marketplace quotes, before incentives | 2026-06-30 (state table 2026-10-16) | 2026-10-21 |
| Fixr | $3.04/W | national average | 2026-01-30 | 2026-10-21 |
| SunHub | $2.50/W to $3.30/W | residential, before incentives | 2026-06-04 | 2026-10-21 |
| SolarSavingsHub | $2.85/W to $3.25/W | national average installed, gross | 2026-10-04 | 2026-10-21 |
| GreenEnergyCalc | $3.50/W | LBNL Tracking the Sun 2024 median, cash purchases (cited by page; also cites EnergySage $2.60) | 2026-10-02 | 2026-10-21 |
| Nedes | $2.20/W to $3.66/W | installed 2026, before incentives | 2026-08-27 | 2026-10-21 |
| ProHouseMaintenance | $2.58/W | citing EnergySage, before incentives | 2026-06-01 | 2026-10-21 |
| SolarReviews | $3.03/W | 7.2 kW cash, before incentives | 2026-10 | 2026-10-21 |
| EcoWatch | $3.33/W | EcoWatch analysis, appears pre-credit (page dating inconsistent) | not stated | 2026-10-21 |
| Arka360 | $2.59/W to $2.86/W | residential average; basis not stated | 2026-06-05 | 2026-10-21 |
| Portlandia Electric Supply | $2.50/W to $3.50/W | before incentives | 2026-06-06 (updated 2026-09) | 2026-10-21 |
| The Green Watt | $2.50/W to $3.20/W | installed, gross | 2026-04-15 | 2026-10-21 |
| NRG Clean Power | $2.58/W to $2.75/W | marketplace quotes (page also cites LBNL cash ~$3.50) | 2026-07-25 | 2026-10-21 |
| Solar Powered Tech | $4.00/W | LBNL 2024 median all purchases, before incentives (cash median $3.50) | 2026-09-24 | 2026-10-21 |
| RenCalc | $2.40/W to $3.70/W | before incentives | 2026-09-04 | 2026-10-21 |
| SolarWattCalc | $2.50/W to $3.50/W | US | not stated | 2026-10-21 |
| pv magazine USA (via Now.Solar), citing Wood Mackenzie/SEIA | $3.36/W | Wood Mackenzie/SEIA Q2 2026 turnkey residential | 2026-09-24 | 2026-10-21 |
| Jouleio | $2.50/W to $3.50/W | citing SEIA 2025 | 2026-05-18 | 2026-10-21 |
| SurgePV | $2.50/W to $3.39/W | before incentives | 2026-07-19 | 2026-10-21 |
| solar.com | $3.36/W | national benchmark per SEIA/Wood Mackenzie | not stated | 2026-10-21 |
| This Old House | $2.29/W to $3.66/W | state range, 10-kW system before tax credit (no national average given) | 2026-06-12 | 2026-10-21 |
Each row is a figure as the source states it, gross of incentives, not adjusted by us. The headline range is a HyreSolar calculation over these rows. No 30% federal credit is subtracted: Section 25D ended for expenditures after December 31, 2025.
Compare quotes from vetted solar installers Proposal analyzer
What moves cost per watt
Cost per watt falls as systems grow, because part of every project is close to fixed: design, permitting, the interconnection application, mobilising a crew and commissioning. Spread over fewer watts, that fixed part lifts the figure on small systems for structural reasons, not suspicious ones.
Roof complexity, equipment and electrical work move it next. Several planes, steep pitch, tile or slate all add labor for the same watts. Microinverters and optimizers cost more than a string inverter. A service panel upgrade or a long conduit run adds cost without adding a single watt.
Four ways a cost-per-watt figure gets distorted
Quoting net of incentives. Subtract an incentive first and the same system looks cheaper. Only the gross figure describes what the company charges.
A dealer fee inside a financed price. The fee raises the amount financed without appearing as its own line; the dealer fee calculator solves for it.
Bundling the battery. Storage is priced per kWh. Adding it to the price while dividing by panel watts produces a figure that always reads high.
Dividing by the AC rating. The AC inverter rating is lower than the DC panel rating, so it inflates the figure for the same system. Use DC on every quote.
Price by size and equipment
| Situation | Direction of cost per watt |
|---|---|
| Smaller system (5 kW) | Higher: fixed costs over fewer watts |
| Larger system (10 kW) | Lower: fixed costs spread further |
| Microinverters or optimizers | Higher, and usually worth it on shaded or multi-plane roofs |
| Tile, slate or metal roof | Higher: specialist attachments and labor |
| Ground mount | Higher: racking, foundations, trenching |
How to check a quote
- 1Same size basis
DC watts on every quote.
- 2Gross price
Before incentives and before financing.
- 3Non-generation items in their own column
Battery, charger, roof work, panel upgrade.
- 4Compare against the sourced range, then against each other
A quote far above the range above needs a reason you can name: roof, equipment, electrical work. The proposal analyzer shows where the money goes.
Questions
What is a good cost per watt for solar in 2026?
Should I compare cost per watt before or after incentives?
Does cost per watt include the battery?
Why is my cost per watt higher than the range?
HyreSolar does not install or finance solar systems. The figures above are other publishers’ published prices, dated and linked; none is a quote for your property. Prices vary with location, roof, equipment, electrical work and financing.