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Use the free estimator for a preliminary layout, or share your preferred response method with the commercial team. Final feasibility still requires site, utility, and engineering review.
Dated planning ranges + official incentive rules + instant site estimate
NuWatt's published direct-purchase planning range is $1.10–$2.55/W before project-specific incentives. At the canonical size tiers, that equals roughly $140,000–$190,000 for 100 kW and $1.10–$1.50 million for 1 MW under the scope defined below. Use the current state program, facility tariff, and a site-scoped EPC quote to turn the range into a real project price.
6% base · 30% increased rate · possible 40% with domestic content
The 30% and 40% columns below are conditional illustrations, not automatic deductions. A project needs the applicable labor or small-facility treatment for 30%; the extra 10 percentage points require separate domestic-content eligibility and certification.
NuWatt's dated 2026 commercial planning range is $1.10–$2.55 per installed watt before project-specific incentives. At the canonical size tiers, a 100 kW system plans at $140,000–$190,000, 250 kW at $350,000–$475,000, 500 kW at $550,000–$750,000, and 1 MW at $1.10–$1.50 million under the stated scope. These are crawlable planning ranges, not quotes; roof condition, structural and electrical work, mount type, interconnection, labor, equipment, financing, and storage can move the final price.
Commercial planning toolkit
Move from property capacity to scoped cost, facility economics, and proposal review without asking one generic calculator to answer every question.
1 · Capacity
Preliminary roof layout, system size, production range, and confidence from one address.
Open tool2 · Economics
Use the actual quote, production model, tariff, O&M, financing, and tax inputs.
Open tool3 · Capital
Compare cash, loan, C-PACE, PPA, and lease terms with ownership kept explicit.
Open tool4 · Review
Pressure-test scope, exclusions, warranties, economics, and documentation.
Open toolHave an address, bills, or an existing proposal?
Start the attributed commercial quote path now; a specialist will verify the site, utility, engineering, interconnection, and tax assumptions before a final EPC price.
Documented NuWatt installations
NuWatt's portfolio includes 12 completed commercial and institutional projects. The first search-release case study documents the 55 kW ground-mounted solar array at Pleasant Valley Gardens in Methuen, MA.
Free address-based tool
Get a preliminary roof layout, panel count, system size, annual production range, and confidence grade before sharing contact details.
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Official benchmark, correctly labeled
The U.S. Department of Energy / National Laboratory of the Rockies Q1-2025 publication models a 250 kWdc BABA-compliant school rooftop at $1.95/W minimum sustainable price, $1.98/W modeled market price, and $40/kW-year O&M for PV only. DOE's published 2024Q1 comparison also shows a representative 3 MW agrivoltaic system at $1.34/W minimum sustainable price, $1.51/W modeled market price, and $22/kW-year O&M. The official benchmarks exclude subsidies payable to the system owner and use defined reference systems; they are context, not a Northeast EPC bid.
Q1-2025 rooftop MMP
$1.98/W
250 kWdc BABA-compliant school rooftop, PV only
Q1-2025 rooftop MSP
$1.95/W
Same official model; owner subsidies excluded
Q1-2025 rooftop O&M
$40/kW-year
Annual PV-only benchmark
2024Q1 agrivoltaic MMP
$1.51/W
Representative 3 MW reference system
U.S. Department of Energy
Solar Photovoltaic System Cost Benchmarks
Published 2024Q1 benchmark table and definitions for modeled market price, minimum sustainable price, O&M, and LCOE.
Verified 2026-08-31
U.S. Department of Energy / National Laboratory of the Rockies
Q1-2025 Solar Photovoltaic System Cost Benchmarks
Latest official downloadable PV system cost-model dataset. It is a benchmark model, not a NuWatt project quote.
Verified 2026-08-31
Cost per panel-face square foot
The official Q1-2025 National Laboratory of the Rockies benchmark models a 500 W commercial rooftop module measuring 2.15 m by 1.1 m, or about 19.6 watts per module-face square foot. Multiplying that density by the published $1.10–$2.55/W band yields roughly $22–$50 per panel-face square foot before incentives.
What the number means
$1.10–$2.55/W × 19.6 W/module-face sq ft = about $22–$50/module-face sq ft
This is a transparent module-density translation, not a roof-area estimate. Fire setbacks, service paths, drains, rooftop equipment, shade, structural zones, row spacing, and export limits reduce array coverage. Use the actual module datasheet and measured layout for a real project.
Inspect the official Q1-2025 benchmark datasetSeparate gross roof area from structurally and operationally usable array area.
Use actual module dimensions, access rules, obstructions, shade, and racking geometry.
Apply the quoted installed $/W only after its equipment, electrical, labor, and interconnection scope is clear.
NuWatt Commercial Solar Cost Index · verified August 31, 2026
These crawlable ranges answer the planning question directly. They represent direct-purchase, PV-only installed-cost bands before project-specific incentives. The federal columns show arithmetic only: 30% requires the increased-rate rules or an applicable exception; 40% additionally requires the 10-percentage-point domestic-content bonus.
| System size | Planning $/W | Gross installed range | After 30% scenario* | After 40% scenario** |
|---|---|---|---|---|
| 100 kW | $1.40–$1.90/W | $140k–$190k | $98k–$133k | $84k–$114k |
| 250 kW | $1.40–$1.90/W | $350k–$475k | $245k–$332.5k | $210k–$285k |
| 500 kW | $1.10–$1.50/W | $550k–$750k | $385k–$525k | $330k–$450k |
| 1 MW | $1.10–$1.50/W | $1.1M–$1.5M | $770k–$1.05M | $660k–$900k |
Commercial PV modules, inverters, standard racking, balance of system, ordinary engineering/permitting, installation labor, commissioning, and ordinary contractor project delivery for a defined DC nameplate size.
Battery storage, roof replacement, structural reinforcement, carport steel, unusual foundations/civil work, service or transformer upgrades, utility study/network upgrades, financing fees, environmental remediation, taxes, and site-specific prevailing-wage compliance.
Tier boundary rule: small commercial is 25–<100 kW, mid-size is 100–<500 kW, and large-scale begins at 500 kW; this is why the 100 kW row uses the mid-size band and the 500 kW row uses the large-scale band. * Illustrative gross cost × 70%. ** Illustrative gross cost × 60% when both the 30% increased rate and 10-percentage-point domestic-content bonus are independently satisfied. The statutory base is 6%; if domestic content qualifies without the increased-rate treatment, the IRS says the bonus is generally 2 percentage points, not 10. State incentives, depreciation, financing, and operating value are not deducted here. Not tax advice and not an EPC quote.
Want the range narrowed to your building?
Use the commercial quote path to narrow the planning range for this site; engineering, interconnection, incentive, and tax eligibility still require verification.
Project-size decision paths
Do not multiply a national $/W benchmark by system size and call it a quote. Start with the facility lane, assemble the decision file, and price the site-specific work that changes at that scale.
50 kW
What drives cost
Mobilization, service-panel capacity, roof condition, and fixed design/permitting work have an outsized effect at this scale.
Bring to the decision file
12 months of bills, roof age and warranty, service voltage, panel schedule, and operating hours.
Open this project-size guide100 kW
What drives cost
Interconnection scope, prevailing-wage treatment, structural review, and production-to-load fit begin to drive the comparison.
Bring to the decision file
Bills plus interval data if available, one-line diagram, roof plan, tax status, and financing objective.
Open this project-size guide500 kW
What drives cost
Switchgear, transformer capacity, phased construction, demand charges, export limits, and roof/civil scope can dominate $/W.
Bring to the decision file
Interval load, tariff, site plan, structural records, utility capacity, operating constraints, and bid exclusions.
Open this project-size guide1 MW+
What drives cost
Civil engineering, land or parking constraints, medium-voltage work, interconnection studies, security, and schedule risk become central.
Bring to the decision file
Site control, survey, civil and electrical records, utility study status, procurement plan, financing, and tax documentation.
Open this project-size guideMount type changes the scope
The planning table is most useful for straightforward commercial rooftop and uncomplicated ground-mount screening. A quote must identify the mount because the structural, civil, electrical, and site-use requirements are different.
| Configuration | Main cost drivers | How to use the $/W range | State-program interaction |
|---|---|---|---|
| Commercial rooftop | Roof membrane/warranty, attachment or ballast, structural capacity, setbacks, equipment relocation, conduit route, and service tie-in. | Use the published band for early screening, then add roof or structural work explicitly rather than hiding it inside a generic $/W. | Massachusetts lists a building-mounted adder; New Jersey groups rooftop with carport/canopy by size. |
| Ground mount | Survey, geotechnical work, grading, stormwater, foundations, trenching, fencing, habitat/land-use review, and longer collector runs. | Straightforward land can screen near the large-project band, but civil and interconnection scope must be priced separately. | New Jersey has lower ground-mount SREC-II segments; competitive or siting rules may also differ by state. |
| Parking canopy / carport | Structural steel, foundations, drainage, lighting, vehicle clearance, parking phasing, snow/wind design, and often EV-ready electrical work. | Do not assume the rooftop band includes canopy steel. Treat canopy construction as separately scoped until a design is priced. | Massachusetts lists a +$0.08/kWh canopy adder; Connecticut publishes separate canopy/carport bid caps. |
Normalize these items before comparing $/W, payback, or financing.
Roof membrane, structural reinforcement, civil work, drainage, foundations, and access.
Service voltage, switchgear, transformer work, conductors, trenching, and interconnection upgrades.
Ballasted roof, attached roof, canopy, and ground mount solve different structural and site problems.
Prevailing-wage obligations, registered apprentices, phasing, operating-hour constraints, and mobilization.
Orientation, shade, curtailment, export compensation, demand charges, and interval load shape.
EPC exclusions, O&M, performance guarantees, insurance, financing fees, and tax ownership.
Current state incentives · official values verified August 31, 2026
These programs use different units and settlement rules. The table preserves the official value, system-size boundary, and limitation instead of converting every program into a misleading one-time rebate. Installed cost still comes from the project scope; program value comes from the state award, tariff, registration, and production record.
| State / program | Current published commercial value | How to apply it safely | Official source |
|---|---|---|---|
| MassachusettsSMART 3.0 · Program Year 2026 | >25–250 kW AC: $0.2807/kWh; >250–500 kW AC: $0.2430; >500–1,000 kW AC: $0.2317; >1–5 MW AC: $0.1790 | These are gross base-compensation rates. Behind-the-meter projects subtract the official value-of-energy amount. A building-mounted adder is +$0.03/kWh; a canopy adder is +$0.08/kWh when qualified. As verified August 31, 2026, DPU tariff proceeding 25-175 is still pending: DOER may accept applications and issue Preliminary Statements, but Final Statements wait for tariff approval and incentive payments will not be backdated. | Massachusetts Department of Energy Resources Verified 2026-08-31 |
| ConnecticutNRES · Year 5 / 2026 | ≤200 kW AC Buy-All: $250.42/MWh; >200 kW AC–<1 MW AC cap: $236.74/MWh; 1–5 MW AC cap: $182.94/MWh | Medium and large canopy/carport bid caps are $338.20/MWh and $261.34/MWh. Buy-All and Netting settle differently, and competitive tiers are caps—not guaranteed awards. | Connecticut Public Utilities Regulatory Authority Verified 2026-08-31 |
| New JerseySuSI / ADI · SREC-II | <1 MW DC rooftop/carport/canopy: $110/MWh; 1–5 MW DC rooftop/carport/canopy: $100/MWh; <1 MW DC ground mount: $90/MWh; 1–5 MW DC ground mount: $85/MWh | One SREC-II is issued per MWh. Eligible public-entity net-metered segments receive a $20/MWh adder. Values are fixed for 15 years after registration; registration and segment eligibility control. | New Jersey Board of Public Utilities Verified 2026-08-31 |
| Rhode IslandRenewable Energy Growth · 2026 ceiling prices | >25–250 kW DC: 31.35¢/kWh; >250–500 kW DC: 28.35¢; >500 kW DC–<1 MW DC: 23.55¢; 1–<5 MW DC: 17.85¢ | These are 20-year ceiling prices used in the program process, not automatic adders or awards, and the approved prices are stated as inclusive of eligible federal incentives. | Rhode Island Public Utilities Commission Verified 2026-08-31 |
Where the official program does not publish one universal commercial rate, we say so. A competitive grant, utility tariff, tax exemption, or market-based contract is not converted into a guaranteed cash rebate.
Renewable Energy Fund support is awarded through current rebate or competitive grant/RFP pathways; there is no single standing statewide commercial PV rate to subtract from every project.
Official sourceCommercial and institutional Net Energy Billing uses PUC tariff credits that vary by utility, customer class, project size, and development timing. Use the current PUC tariff table for the exact account.
Official sourceThe Standard Offer framework covers eligible new renewable plants up to 2.2 MW with solar contract terms of 10–25 years; pricing is program/market based, not one universal commercial rebate.
Official sourceThe Solar Energy Program can award grants up to the lesser of $1 million or $1.50/W and loans up to the lesser of $5 million or $3/W, subject to application, matching, award, and SREC-transfer conditions.
Official sourceTexas provides a property-tax exemption for qualifying solar or wind energy devices. Utility tariffs, export compensation, and local programs still vary; there is no single statewide production payment.
Official sourceMA
Utility context includes Eversource and National Grid.
Commercial solar IRR calculatorNH
Utility context includes Eversource NH and Unitil.
MACRS depreciation for NH businessesME
Utility context includes Central Maine Power and Versant Power.
Maine commercial solar guideVT
Utility context includes Green Mountain Power and Burlington Electric.
Vermont commercial solar guideRI
Utility context includes Rhode Island Energy.
Rhode Island commercial solar guideCT
Utility context includes Eversource Connecticut and United Illuminating.
Commercial solar IRR calculatorPA
Utility context includes PECO and PPL Electric.
MACRS depreciation for PA businessesNJ
Utility context includes PSE&G and JCP&L.
MACRS depreciation for NJ businessesTX
Utility context includes Oncor and CenterPoint Energy.
Commercial solar IRR calculatorFederal tax decision spine
The Section 48E base credit is 6% of qualified investment. It can increase five times to 30% when the applicable prevailing-wage and registered-apprenticeship requirements are met. The IRS also identifies limited exceptions, including certain clean-energy facilities under 1 MW. Eligibility and required records must be confirmed for the specific project.
The IRS domestic-content bonus is a separate certification. It adds 10 percentage points when the project is also entitled to the increased bonus rate—which is why the planning table shows a conditional 40% scenario. If the project does not qualify for that treatment, the domestic-content increase is generally 2 percentage points, not 10.
6%
The statutory amount before the five-times increase.
30%
When the applicable wage and apprenticeship rules are met.
+10 pts
When separately qualified and certified alongside the increased bonus rate.
<1 MW
The IRS identifies certain clean-energy facilities under 1 MW; confirm project eligibility.
100%
For eligible property; tax value depends on the taxpayer.
The Section 48E begin-construction window closed July 4, 2026: projects that began construction on or before that date may use the longer continuity pathway. Commercial solar projects starting now generally must be placed in service by December 31, 2027. The statutory credit is 6%; it can increase to 30% when the applicable prevailing-wage and registered-apprenticeship requirements are met.
Separate cost from return
The cost guide owns pricing and scope. The calculator owns ROI and payback so one tool evaluates the quote, production, utility value, operating cost and documented tax inputs consistently.
Open the ROI calculatorAddress, asset geometry, structural/civil constraints, imagery date, shade screen, and interconnection assumptions.
Bills, interval data, tariff, quote, production model, O&M, financing, tax assumptions, and incentive eligibility.
Utility approvals, program award, labor compliance, tax review, permits, final design, and signed commercial terms.
Get your personalized commercial solar estimate:
Energy storage technology is not subject to the December 31, 2027 placed-in-service deadline or the July 4, 2026 begin-construction trigger — both apply to applicable wind and solar facilities only, and Section 48E(e)(4)(C) expressly excepts energy storage technology (IRS Notice 2025-42, section 2.02). A standalone commercial battery remains eligible for the statutory 6% Section 48E credit, increased to 30% when the applicable wage and apprenticeship requirements are met, under the standard clean-electricity phase-out that starts at the later of 2032 or when U.S. greenhouse gas emissions from electricity are 25% of 2022 emissions or lower.
NuWatt publishes a 2026 direct-purchase planning range of $1.10–$2.55 per installed watt before project-specific incentives. The lower end describes larger, straightforward projects; the upper end describes smaller commercial systems with more fixed cost per watt. It is a planning band, not a site-specific EPC quote.
Bring the address, bills, interval data if available, and any existing proposal. The commercial quote path starts the project; NuWatt then verifies equipment, structure, electrical scope, interconnection, state-program treatment, and tax assumptions.