A typical New Mexico solar system is 7.04 kW and costs about $19,078 before incentives, at $2.71 per watt, the 10th lowest price of 51. It is the median size New Mexico homeowners installed in 2025, and the sun here is among the strongest in the country.
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7.04 kW of panels at $2.71 a watt: how New Mexico ends up with a $19,100 ticket
The average New Mexico home uses about 654 kWh a month and pays roughly $97, among the lowest bills in the nation. The typical system is 7.04 kW, the median size New Mexico homeowners installed in 2025 (Berkeley Lab, 3,212 systems). At $2.71 per watt, the 10th lowest price of 51, that comes to about $19,100.
The typical New Mexico system, from size to price
The 7.04 kW size is what New Mexico homeowners typically installed in 2025, not a size matched to the average bill. Your own bills and roof set your size.
$2.71 a watt from 3 kW to 10 kW: New Mexico gross prices
Hold every quote against $2.71 per watt. Each price below is gross, before incentives. For the picture beyond New Mexico, start with our solar panel costs across the country.
Each size multiplied by New Mexico’s $2.71 per watt. Solar only. Real quotes vary by roof, equipment and installer.
An extra 50¢ a watt is a four-figure overchargeOn a 7.04 kW system, 50¢ a watt above $2.71 adds about $3,520. Modest bill savings take years to claw that back, so ask for a reason behind any quote far above the benchmark.
Dearer per watt than Arizona and Texas, stronger per panel
Arizona and Texas install cheaper per watt. But New Mexico’s production factor, 1,824 kWh per kW a year, beats Arizona’s 1,789 and Texas’s 1,624. And unlike Arizona, New Mexico still credits exports at the full retail rate.
Cheap hardware is only half the equation. What the meter does with your surplus is the other half, and that is where New Mexico quietly wins the region.
Full retail inside the month, your utility’s rule for the surplus
Under 17.9.570.14 NMAC, regulated New Mexico utilities net meter systems up to 10 kW at full retail inside the month. The typical 7.04 kW system sits below that ceiling. What varies is the month’s net surplus.
Power netted within the month
Up to what you use in the month, each kWh you send out offsets one you buy, at the full retail rate.
A month’s net surplus
The rule lets each utility either pay it at an energy rate below full retail, or carry it forward as 1-to-1 kWh credits.
PNM serves about 56% of the state’s homes. Southwestern Public Service and El Paso Electric serve around 11% each. Their elections differ.
Size at or slightly below your usageUnlike states that settle once a year, a New Mexico system faces its meter every month. Sizing at or slightly below your usage keeps more of your production at full value. Oversizing hands the surplus to whichever rule your utility elected.
Get your utility’s surplus rule in writingBefore signing anything, ask the installer to state in writing how your utility handles monthly surplus. It decides whether summer overproduction is banked or discounted.
$1,874 a year against $19,078: payback on PNM
The typical 7.04 kW system makes about 12,839 kWh a year. On PNM every kWh is netted in the month or carried as a kWh credit, so each is worth PNM’s price after its monthly charges, 14.59¢: about $1,874 in year one, for a simple payback before incentives of about 10.2 years. No federal residential credit, upkeep or price rises are in the math.
On El Paso Electric and Xcel Energy, month-end surplus earns less than retail, so homes there can take longer; we print no payback for them yet. The dollars are smaller than in high-rate states, and so is the money at risk.
Rerun it with the rate on your own billThe chain runs on PNM’s 16.91¢ EIA average price, less its $11.93 customer charge and $0.77 Rider 60 a month. PNM serves over half of New Mexico homes; use the rate on your own bill.
The 30% federal credit is gone for systems you ownThe 25D credit is $0 for host-owned systems whose installation is completed after December 31, 2025. Leases and PPAs are legal in New Mexico and can still carry the separate 48E credit through the third-party owner, so compare both routes.
Four New Mexico buyers a small system still does not suit
A low ticket does not make solar right for every home. Think twice if one of these fits:
- Your bill is about $60. If your usage runs well under the state average, the fixed costs of any install spread across too few kilowatt-hours. Payback stretches past the point of sense.
- You are on a municipal utility or co-op and have not checked its terms. The NMAC rule covers PRC-regulated utilities. Farmington’s municipal utility and the state’s co-ops set their own terms, which can differ sharply. Verify before trusting any payback.
- Your quote is far above $2.71 per watt, with no reason given. On a small system, an extra 50¢ a watt is a four-figure overcharge.
- You may move within a decade. A payback of about 10.2 years needs either a decade in the home or a sale that prices the system in.
Ask what your utility does with extra power
The right number for your house depends on your bills and your utility’s surplus rule. Enter your ZIP code to request quotes, then check each one against both.
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Where to read next on New Mexico solar
Frequently asked questions
How much do solar panels cost in New Mexico in 2026?
About $2.71 per watt installed, the 10th lowest of 51 (EcoGen Solar Cost Index, September 2026 Edition). The typical system is 7.04 kW, the median size New Mexico homeowners installed in 2025, around $19,078 before incentives.
Does New Mexico have net metering?
Yes. Regulated utilities net meter systems up to 10 kW at full retail inside the month under 17.9.570.14 NMAC. The surplus is credited by your utility’s rule: PNM carries it forward as kWh credits that never expire, while El Paso Electric and Xcel Energy pay an energy rate below retail, so confirm your utility’s approach in writing.
What is the solar payback period in New Mexico?
About 10.2 years on PNM, the largest utility, simple payback before incentives, with every kWh the 7.04 kW system makes valued at PNM’s price after its monthly charges. On El Paso Electric or Xcel Energy, where month-end surplus earns less, it can take longer. New Mexico’s refundable 10% state tax credit (up to $6,000, after state certification and while the yearly cap lasts) lowers the cost if you qualify.
Is there still a federal solar tax credit in New Mexico?
Not for systems you own: the 25D residential credit is $0 for host-owned systems whose installation is completed after December 31, 2025. Leases and PPAs are legal in New Mexico and can still carry the separate 48E credit through the third-party owner, so compare both routes.
Is New Mexico good for solar compared to Arizona?
New Mexico installs cost slightly more per watt than Arizona’s, but New Mexico produces more per kW (1,824 vs 1,789 kWh per kW per year) and still nets exports at full retail inside the month, which Arizona does not. For the value of each panel over its life, New Mexico is the stronger deal.
How we calculate these costs
Cost figures use New Mexico’s entry in the EcoGen Solar Cost Index (September 2026 Edition): $2.71 per watt. The 7.04 kW typical size is Berkeley Lab’s 2025 median for New Mexico single-family installs (3,212 systems). Payback is our per-utility figure for PNM: the typical cost divided by the year-one value of every kWh the system makes (1,824 kWh per kW a year) at PNM’s EIA price less its monthly charges, with no federal residential credit for host-owned systems, no upkeep and no rate growth.
Sources (6)
- New Mexico Public Regulation Commission (PRC), Rule 17.9.570.14 NMAC, net metering (accessed June 11, 2026): srca.nm.gov
- U.S. Energy Information Administration, Electric Power Monthly, residential price by state, 12-month average August 2025 to July 2026: eia.gov
- U.S. Energy Information Administration, Form EIA-861, 2024: residential customers of PNM, Southwestern Public Service and El Paso Electric (accessed June 10, 2026): eia.gov
- U.S. Census Bureau, American Community Survey, 2024 (accessed June 11, 2026): census.gov
- IRS, One, Big, Beautiful Bill Provisions: Public Law 119-21 and the end of Section 25D (accessed August 15, 2026): irs.gov
- DSIRE, Third-Party Solar PV Power Purchase Agreement Policies, May 2026 (accessed August 15, 2026): ncsolarcen-prod.s3.amazonaws.com
