Mertzon, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Mertzon.
The PVWatts model puts a generic roof array in Mertzon at 1,654 kWh a year for each kW of panels, using typical-year weather from a station 1.1 km away. A modeled estimate for a standard setup, not a measurement of any roof.
A year on one roof.
Scroll from January to December: the noon sun over Mertzon climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 159, weakest 111: a ratio of 1.43.
How Mertzon comparesderived from the figures above
Where Mertzon sits.
Mertzon ranks 161st of 1220 Texas places modeled here, at the 87th percentile. Its 1,654 kWh per kW is above the Texas median of 1,515. The strongest months are April, July, May and the weakest are December, November, February; output peaks in April and bottoms out in December. In all, 28.1% of the year arrives in June, July and August, less than the 29.3% of the median place.
Closest modeled neighbors
- San Angelo, 40 km northeast: 1,652 kWh per kW, 2 less than Mertzon.
- Eldorado, 49 km southeast: 1,657 kWh per kW, 3 more than Mertzon.
- Big Lake, 60 km west: 1,721 kWh per kW, 67 more than Mertzon.
- Sterling City, 66 km north: 1,701 kWh per kW, 47 more than Mertzon.
- Miles, 71 km northeast: 1,635 kWh per kW, 19 less than Mertzon.
- Robert Lee, 78 km northeast: 1,662 kWh per kW, 8 more than Mertzon.
- Sonora, 79 km south: 1,623 kWh per kW, 31 less than Mertzon.
- Bronte, 86 km northeast: 1,649 kWh per kW, 5 less than Mertzon.
- Paint Rock, 89 km east: 1,653 kWh per kW, 1 less than Mertzon.
Against San Antonio
The nearest of the six largest modeled places is San Antonio, 298 km to the southeast, at 1,505 kWh per kW. Mertzon models 149 kWh per kW (9.9%) above it. Mertzon lies 1.8 degrees of latitude north of San Antonio, which on sun angle alone would point the other way, so clouds, haze and the weather station's record carry the difference. The weather station for Mertzon is 1.1 km from the modeled point, against 2.2 km for San Antonio, so part of the gap can come from which station's typical year was used.
The second-nearest large place is Austin, 312 km east, where the same model gives 1,483 kWh per kW, so Mertzon runs 171 above that figure. Against the Texas median place month by month, Mertzon runs at least 2% higher in January, February, March, April, May, June, July, October, November, December.
Electricity in Irion CountyEIA-861
Electricity prices nearby
EIA lists Oncor Electric Delivery and AEP Texas North in this county. Where Mertzon is on Oncor Electric Delivery and AEP Texas North's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Mertzon may instead be served by a co-op or utility listed below, which sets its own rates; check your bill. For scale only, the median 2025 average price across the 60 Texas retail providers on this site is 15.32¢ per kWh, which would put the modeled 1,654 kWh at $253 per kW a year, plain multiplication and not a savings estimate or an offer.
Also listed in the county
- Concho Valley Elec Coop Inc: 13.5¢ per kWh, a bundled average, 12,230 residential customers across 10 counties.
- Southwest Texas Elec Coop, Inc: 14.65¢ per kWh, a bundled average, 5,934 residential customers across 12 counties.
- Oncor Electric Delivery Company LLC: 5.64¢ per kWh, delivery charges only, before the retail energy price, 3,545,814 residential customers across 99 counties.
These utilities serve other parts of the county, which can include parts of Mertzon. They are the largest bundled providers, and the largest delivery-only one, whose EIA service territory lists the county. A county can list several, and which one serves a street depends on the address, so check your bill.
Modeled estimateruns in your browser
Size the array, see the kWh.
Scale the Mertzon model to another array size, take off extra losses for shade or dirt, and price the energy at any rate. It is arithmetic on the PVWatts output above, nothing more: not a quote, not a savings estimate and not advice.
Starting rate: the Texas residential average of 15.4¢ per kWh. At that rate the modeled output is worth $255 per kW a year as plain multiplication.
PVWatts v8station 593962
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 121.2 |
| February | 119.5 |
| March | 142.7 |
| April | 159.4 |
| May | 158.0 |
| June | 154.4 |
| July | 159.2 |
| August | 151.7 |
| September | 134.8 |
| October | 130.1 |
| November | 111.6 |
| December | 111.2 |
| Year | 1,654 |
Model assumptions
- System size
- 1 kWDC, results scale per kW
- Mount
- fixed roof mount
- Tilt
- 20°
- Azimuth
- 180°due south
- Modules
- standard
- System losses
- 14%
Location 31.26, -100.82 (Mertzon, population 762). Weather: typical-year data from station 593962, 1.1 km from that point.
Getting a measured number
A model cannot see your roof. Installers measure pitch, shade and the electrical panel on site. Quote marketplaces such as EnergySage, SolarReviews and WattBuy collect bids from local installers. Rate & Roof does not rank installers.
Next step
Payback, buyback.
The sliders above price the energy at one rate. The payback calculator adds the system cost and your buyback plan type, and shows every assumption. It is an estimate, not advice.
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Rates change. Get told.
One list, for Texas solar buyback plans. We write when a tracked rate changes and when new city data is published. Nothing else, and nothing until you confirm.