How Much Does a Solar System Cost in 2026?
A 2026 U.S. solar cost-planning guide using EnergySage's H2 2025 marketplace median, DOE cost benchmarks and current IRS credit guidance.
Editorially reviewed August 25, 2026 by the Solar Calculator HQ editorial team. No installer, manufacturer or advertiser approved this guide. See our editorial standards.
The most recent national marketplace price cited in this guide is $2.49 per watt, the median reported by EnergySage for solar quotes on its marketplace in the second half of 2025. The EnergySage H2 2025 marketplace report says the metric increased 0.4% during that period.
This is an H2 2025 marketplace median, not a guaranteed 2026 price, a government estimate, a state median, or a prediction of what every installer should charge. It reflects EnergySage’s marketplace population and reporting method during a period of unusually strong demand before the former federal homeowner-credit deadline. Use it as a dated comparison point and replace it with current, scope-matched quotes.
What $2.49 per watt means in arithmetic
Applying the H2 2025 median as a simple planning input gives:
| System size | Planning price at $2.49/W |
|---|---|
| 5 kW | $12,450 |
| 6 kW | $14,940 |
| 8 kW | $19,920 |
| 10 kW | $24,900 |
| 12 kW | $29,880 |
These figures are only DC system watts × $2.49/W. They are not 2026 quotes and do not establish what is included. A proposal can be higher or lower because its equipment, site conditions, contract structure, installer workload and local requirements differ from the marketplace sample.
Marketplace prices and DOE benchmarks answer different questions
The EnergySage figure summarizes marketplace pricing. DOE’s Solar Photovoltaic System Cost Benchmarks are modeled systems built from cost categories such as modules, inverters, structural and electrical balance of system, fieldwork, office work and other costs. DOE publishes both a minimum sustainable price and a modeled market price and explains that the measures have different planning uses.
Do not substitute a DOE modeled benchmark for a contractor’s current offer, or present the EnergySage marketplace median as a DOE estimate. The most useful comparison for a homeowner is still several current proposals with the same ownership, financing and project scope.
What drives the price within that range
The main variables to reconcile are:
- System boundary. Confirm whether the total includes modules, inverter equipment, racking, monitoring, design, permitting, inspection, interconnection and applicable taxes.
- Site work. Roof material and condition, access, multiple roof planes, structural work, trenching and service-equipment changes can alter labor and materials.
- Equipment and design. Compare exact module and inverter models, DC and AC capacities, layout, rapid-shutdown design and storage scope. Do not compare two offers described only as “premium.”
- Location and timing. Labor, permitting, utility processes, code requirements, installer capacity and equipment availability vary by place and date.
- Contract and payment method. A cash price, financed purchase, lease and power-purchase agreement are different products. Compare cash-equivalent system price separately from interest, dealer fees and scheduled payments.
Why a state-by-state quote can differ
Labor, permitting, interconnection, roof types and equipment availability vary by project. A statewide figure may also combine different system sizes, ownership types, financing and completion dates. Use the Cost of Solar Panels Calculator as a planning model, then replace its assumptions with current cash-equivalent quotes that disclose the same scope.
Price storage and other additions separately
A solar-plus-storage total is not comparable with a PV-only $/W figure. Ask for separate subtotals for PV, battery hardware, usable battery capacity, backup equipment, electrical work and any service upgrade. Also separate roof work, ground mounting, trenching, EV-charging work and optional maintenance. Brand-level national price ranges are not a substitute for a site-specific scope.
Federal homeowner credit cutoff for property placed in service after 2025
The IRS Residential Clean Energy Credit page says the credit is not available for property placed in service after December 31, 2025. Do not subtract 30% from a system first placed in service in 2026.
An unused carryforward from an earlier eligible installation, state tax treatment, or a third-party owner’s business-credit position is a different question. Confirm tax-sensitive facts with the relevant tax authority or a qualified adviser. Verify any state, utility or local incentive with the current administrator and show it as a separate line rather than silently reducing the quoted system price.
Cash, loan, lease or PPA — normalize before comparing
Compare every option on the same basis:
- Cash purchase: total installed price, payment schedule and exclusions.
- Financed purchase: cash-equivalent price, financed amount, every fee, APR, term, total of payments, security interest and prepayment terms.
- Lease: upfront and scheduled payments, escalator if any, transfer conditions, maintenance responsibilities and end-of-term options.
- PPA: energy price, escalator if any, minimum charges, production treatment, transfer conditions and buyout terms.
A low initial payment does not establish a low lifetime cost. Obtain the cash-equivalent purchase price even if the preferred option is financed.
What is not in the headline price
- Roof repair or replacement
- Structural reinforcement or unusual attachments
- Tree work and shade mitigation
- Service-panel, meter or transformer work
- Ground-mount foundations, trenching and conduit
- Battery, backup gateway or load-control equipment
- Permit, interconnection or tax items expressly excluded by the seller
Do not add a generic contingency percentage in place of a site survey. Ask the seller to identify assumptions, allowances and change-order triggers in writing.
Reference sources for U.S. pricing
- EnergySage — H2 2025 Home Electrification Marketplace Report, the source and period for the $2.49/W marketplace median used here.
- U.S. Department of Energy — Solar Photovoltaic System Cost Benchmarks, which explains the modeled benchmark system, cost categories, minimum sustainable price and modeled market price.
- Internal Revenue Service — Residential Clean Energy Credit, for the placed-in-service cutoff after December 31, 2025.
How to lock in a fair price
- Request multiple current proposals for the same DC capacity, ownership type and battery scope.
- Record the cash-equivalent total and calculate
total price ÷ DC wattsyourself. - Compare exact equipment models, AC capacity, modeled first-year production, weather source and loss assumptions.
- Identify every exclusion, allowance, incentive and change-order condition.
- Compare financing separately from system price, and compare warranty language as written rather than relying on a salesperson’s summary.
Use the Cost of Solar Panels Calculator for an initial budget. Keep $2.49/W labeled as the EnergySage H2 2025 marketplace median, then overwrite it with the current cash-equivalent quote you are actually evaluating.