Solar panels in Las Cruces: what they cost and what they make
A typical Las Cruces home needs 11 solar panels. They would make about 8,395 kWh a year and cost $12k to $17k before incentives. At today's electricity prices they pay for themselves in about 10.8 yrs.
See panels on your own Las Cruces roof
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What solar costs in Las Cruces
At $3.00 a watt, the median price cash buyers pay nationally, a 4.6 kW system costs about $13,800. Quotes in Las Cruces will usually fall between $11,500 and $17,250. Complex roofs, main-panel upgrades and financing push prices up.
The 30% federal tax credit no longer applies to systems homeowners buy. This estimate includes no state or utility incentives; check with your utility before you buy.
The number that decides whether solar pays in Las Cruces is what your utility pays for the power you send back. Under full payback is about 10.8 yrs. Under net billing it is about 18.1 yrs, because only the ~41% of solar a typical home uses as it is made saves the full retail price.
Cash purchase, prices rising 2.5% a year, panels losing 0.5% a year, $25/kW a year for upkeep. No federal credit for homeowner-owned systems.
Every way to pay for a 4.6 kW system in Las Cruces
Change any number →| Way to pay | Day one | Monthly payment | Monthly net, year 1 | Ahead after 25 years |
|---|---|---|---|---|
| Pay cash Full price on install day | $13,800 | $0 | +$96 | $24k |
| Credit-union loan 8% APR, 20 years, no dealer fee | $0 | $115 | −$20 | $9,900 |
| “1.99%” solar loan 1.99% APR, 25 years, 25% dealer fee | $0 | $73 | +$23 | $16k |
| Lease $90/mo, +2.9%/yr | $0 | $90 | +$15 | $1,600 |
| Power purchase (PPA) 12.8¢/kWh, +2.9%/yr | $0 | $90 | +$16 | $4,300 |
Under net metering, at 15.1¢/kWh rising 2.5% a year. The “1.99%” loan’s $3,450 dealer fee is included in its payments. Lease and PPA prices are typical offers, not quotes.
How much sunshine Las Cruces gets
kWh per kW, 25° southMay is the best month for solar in Las Cruces, and Dec the weakest: a Dec day makes 72% of a May day. A 6 kW system would make about 759 kWh in Dec and 1,055 kWh in May.
On June 21 the sun rises at 6:00 am and sets at 8:17 pm, 14 hours 16 minutes of daylight. On December 21 it is up from 7:04 am to 5:06 pm, just 10 hours 1 minutes.
Peak sun hours in Las Cruces, month by month
| Month | Flat ground | Panels at 33° | kWh per kW |
|---|---|---|---|
| Jan | 3.6 | 5.9 | 136 |
| Feb | 4.6 | 6.5 | 138 |
| Mar | 6.0 | 7.2 | 170 |
| Apr | 7.3 | 7.5 | 175 |
| May | 8.0 | 7.3 | 176 |
| Jun | 8.1 | 6.9 | 160 |
| Jul | 7.2 | 6.3 | 151 |
| Aug | 6.7 | 6.5 | 151 |
| Sep | 5.9 | 6.7 | 148 |
| Oct | 5.0 | 6.8 | 153 |
| Nov | 3.9 | 6.1 | 134 |
| Dec | 3.3 | 5.5 | 127 |
| Year | 5.8 | 6.6 | 1,817 |
A peak sun hour is one hour of sunlight at 1,000 W per m². Why sites disagree.
The best angle and direction for panels in Las Cruces
| Roof faces (6/12 pitch) | Output vs south | kWh per kW |
|---|---|---|
| South | 100% | 1,817 |
| Southeast | 96% | 1,744 |
| Southwest | 95% | 1,726 |
| East | 84% | 1,526 |
| West | 83% | 1,508 |
| North | 61% | 1,108 |
Face panels south and tilt them 33° for the most energy over a year. East and west roofs keep about 84% of that. A north-facing roof keeps 61%, which is rarely worth the money. Try other angles.
Where the sun goes over Las Cruces
The noon sun is lower in winter, which is why the best winter tilt (58°) is steeper than the best summer tilt (3°).
Las Cruces's homes
Las Cruces has 47,517 households. 55.9% own their home, and 23,491 of those owners live in single-family houses, the kind of home that usually gets rooftop solar.
The median home here was built in 1991. Many roofs that age are due for replacement. Replace the roof first, then add solar: taking panels off and putting them back later costs thousands.
32.8% of homes heat with electricity and 63.7% with gas. If you switch to a heat pump or an electric car, plan for more panels or leave room on the roof.
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates.
If the power goes out in Las Cruces
Solar panels alone shut off in a blackout. Add a battery and they keep going. One Tesla Powerwall 3 (13.5 kWh) running a fridge, freezer, furnace fan, lights, Wi-Fi, TV and microwave (6.9 kWh a day):
Change the appliances, the battery and the weather in the battery calculator.
Questions people ask about solar in Las Cruces
How much do solar panels cost in Las Cruces?
A 4.6 kW system — enough for the average New Mexico home — costs about $11,500 to $17,250 before incentives, based on $2.50–$3.75 per watt. The 30% federal credit no longer applies to systems homeowners buy.
How many solar panels does a house in Las Cruces need?
About 11 panels of 420 watts for a home using 654 kWh a month, the New Mexico average. Each kilowatt of panels here makes about 1,817 kWh a year on a south-facing roof.
Is solar worth it in Las Cruces?
Over 25 years, solar power here costs about 8.5¢ per kWh, against 15.1¢ from the grid today. Payback is about 10.8 yrs if your utility credits exported power at the full retail rate, and 18.1 yrs if it pays about 30% of retail.
How many peak sun hours does Las Cruces get?
6.6 a day on panels tilted to 33°, and 5.8 on flat ground. The best month is Apr; the weakest is Dec.
What is the best angle for solar panels in Las Cruces?
33° for the most energy over a year, facing south. 58° is best in winter and 3° in summer. On a normal pitched roof, anything within 15° of 33° gives you about 95% of the maximum.
How long would a home battery last in a Las Cruces power outage?
A Tesla Powerwall 3 running a fridge, freezer, furnace fan, lights, Wi-Fi, TV and microwave (6.9 kWh a day) lasts about 43 hours with no sun. With 7 kW of solar to recharge it, it gets through a three-day outage even in overcast January.
Solar near Las Cruces
| City | Miles | kWh per kW | Sun hours |
|---|---|---|---|
| El Paso, TX | 39 | 1,838 | 6.6 |
| Albuquerque, NM | 192 | 1,823 | 6.5 |
| Rio Rancho, NM | 204 | 1,820 | 6.5 |
| Santa Fe, NM | 235 | 1,803 | 6.4 |
| Tucson, AZ | 239 | 1,821 | 6.6 |
Cities with the same sunshine as Las Cruces
These far-away cities get almost exactly as much solar energy per panel.
- Las Vegas, NV 1,827 kWh per kW
- Indio, CA 1,825 kWh per kW
- San Bernardino, CA 1,798 kWh per kW
Snow: NASA records about 3 cm of snow on the ground here in an average January. Covered panels make little until it slides off, and these figures (like PVWatts') don't subtract that.
Sources: NASA POWER 2001–2020 monthly climatology (grid cell 33 km from Las Cruces's Census point), our PV model (within 1.6% of NLR PVWatts® on average), U.S. EIA prices and use, U.S. Census 2025 population estimates and ACS 2020–2024. Estimates for an average home, not a site survey. How we calculate.