How Much Do Solar Panels Cost in 2026? (State-by-State)
The national benchmark for a residential rooftop solar system in the United States is $2.78 per watt (modeled sustainable price) to $2.95 per watt (modeled market price) for an 8 kWdc PV-only system, per the National Laboratory of the Rockies' Q1 2025 benchmark. Add battery storage (8 kWdc plus 13.5 kWh), and the benchmark rises to $4.33–$4.59 per watt. The 30% federal tax credit is gone for 2026 installs, so these figures are the full picture before any state or utility incentives. But that national number is only a starting point — your actual cost depends on your state, your roof, and the installers you choose. Here's how to use the benchmark honestly.
The national benchmark, explained
The figures come from NLR's residential PV system cost benchmark (Q1 2025, inflation-adjusted to 2024 dollars), published through the Department of Energy's solar cost benchmarks page (lab page: nlr.gov solar cost analysis). Two numbers are published for each configuration:
- MSP ($2.78/Wdc PV-only; $4.33/Wdc PV+storage) — the "modeled sustainable price": what a competitive, efficient installer should be able to deliver at a sustainable margin. Think of it as the benchmark's floor for a fair deal.
- MMP ($2.95/Wdc PV-only; $4.59/Wdc PV+storage) — the "modeled market price": what typical customers actually paid. The gap between MSP and MMP is where installer margin, sales costs, and local variation live.
A crucial note on these numbers: "PV-only" means panels, inverter, racking, labor, permitting, and interconnection — everything to get power flowing. "PV+storage" adds a 13.5 kWh battery, a common residential configuration. Both are for an 8 kWdc reference system. These are national averages, not prices anyone will quote you.
Do the math: a worked example (labeled example only)
The fundamental equation for residential solar pricing is simple:
System watts × $/watt = gross installed cost
Example only — not a quote. Take the 8 kWdc reference system at the modeled market price: 8,000 W × $2.95 = $23,600 gross. Replace both inputs with your own: your system size in watts and the $/watt figure from your actual quotes. For a battery-added system, the same example becomes 8,000 W × $4.59 = $36,720 gross.
This equation is why $/watt is the metric every serious comparison uses — the Treasury's consumer guide and the Energy.gov planning guide both list $/watt and estimated $/kWh as the comparison metrics bids should state. A quote that only gives you a total price without a $/watt figure is a quote you cannot compare.
Why costs vary by state (qualitatively — no invented figures)
We do not publish state-by-state price tables, because the only verified figures available are national, and inventing state numbers would be dishonest. What can be said with confidence is what drives the variation:
- Labor rates. Installer labor is a major cost component, and prevailing wages differ across regions — higher in dense coastal markets, lower elsewhere.
- Permitting complexity. Some jurisdictions have streamlined, low-cost solar permitting; others require multiple inspections, structural engineering stamps, or lengthy interconnection studies. Permitting friction lands in your quote.
- Roof type and condition. A simple asphalt-shingle roof with good orientation is cheapest to build on. Tile, metal, or steep-slope roofs, older roofs needing reinforcement, and shaded or complex roof geometries all add cost.
- Local competition. Markets with many active installers tend to compress margins toward the MSP benchmark; markets with one or two dominant players tend to sit closer to — or above — MMP.
Net effect: two identical 8 kW systems can cost meaningfully different amounts in different places. The benchmark tells you the neighborhood; quotes tell you your address.
Your 5-minute estimate-your-cost worksheet
Before calling installers, spend five minutes producing your own estimate so you can smell an outlier quote.
- Find your annual kWh usage. Pull 12 months of electricity bills (or log into your utility account) and add up total kilowatt-hours. Energy.gov's planning guidance is explicit: review your bills month by month to establish your electricity needs. This is the single most important number in the whole exercise.
- Size the system with PVWatts. Go to the official PVWatts Calculator (pvwatts.nlr.gov — note the newer NLR address), enter your address and roof assumptions, and size a system that covers a large share of your annual kWh. The calculator uses National Solar Radiation Database data to estimate production.
- Multiply by the benchmark range. Take your system size in watts and multiply by $2.78–$2.95/W (PV-only) or $4.33–$4.59/W (with a 13.5 kWh battery). That range is your estimate of gross cost — remember, it's labeled as an estimate, because it's built on a national benchmark.
- Subtract verified state incentives. Search your ZIP code in the DSIRE database for state, utility, and local incentives. Some are verified large — California's SGIP equity budget offers $1,100/kWh of battery storage and $3,100/kW of solar for eligible customers; New York's NY-Sun and Illinois's Illinois Shines SREC program are active — but amounts and availability are region-specific, so confirm before subtracting.
- Get three quotes — and demand the anatomy. Per the Energy.gov guide (mirrored at the state-program resource library), every bid should state: maximum generating capacity (W/kW), estimated annual energy production (kWh), total installed cost including hardware, installation, interconnection, permitting, sales tax, and warranty, plus $/watt and estimated $/kWh as comparison metrics. Three quotes against your worksheet estimate is how you find the fair price.
The 2026 tax-credit caveat
Through 2025, most cost guides subtracted the 30% federal credit as a matter of course. That credit — Section 25D — is not available for systems placed in service after December 31, 2025, and its companion 25C credit ended the same day, both terminated by Public Law 119-21 (signed July 4, 2025). Read our full guide, "Is the Solar Tax Credit Still Available in 2026?", for the timing rules (completion date, not signature date, is what counts) and what state programs remain. The practical effect: the benchmark above is the full pre-incentive picture. Don't mentally apply a 30% discount that no longer exists.
Avoiding the expensive mistakes
Two warnings matter more in 2026 than ever. First, per the Treasury's Consumer Solar Awareness guide, "free solar" claims, pressure tactics, fake government affiliation, excessive fees, and large upfront deposits are scam red flags — compare installers on itemized work and materials, warranties, and the Treasury's quote-comparison checklist, and know where to complain (FTC, CFPB, your state consumer agency) if something goes wrong. Second, if an installer pitches a lease or PPA as the way to keep a federal credit alive: the 2025 law changed the commercial-credit rules too, and the IRS's 48E page is not yet updated — the rules are still being finalized. Get any claimed savings in writing. And note that on leases and PPAs, annual payment escalators above roughly 3% per year are a red flag, with the best offers at 1% or less or fixed payments.
Verified: 2026-10-11 — NLR Q1 2025 national benchmark figures (PV-only 8 kWdc MSP $2.78/Wdc, MMP $2.95/Wdc; PV+ESS 8 kWdc + 13.5 kWh MSP $4.33/Wdc, MMP $4.59/Wdc), MSP/MMP definitions; PVWatts URL (pvwatts.nlr.gov); DSIRE URL; 25D/25C 2025 termination; Energy.gov quote anatomy list; Treasury scam red flags; lease/PPA escalator guidance. All linked sources opened and confirmed resolving on 2026-10-11.
This article was drafted with AI assistance and reviewed by the site editor.