La Grulla, TXLocal --:--Sun now --Daylight today --
Sun on a roof in La Grulla.
The PVWatts model puts a generic roof array in La Grulla at 1,579 kWh a year for each kW of panels, using typical-year weather from a station 2.4 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 La Grulla climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 158, weakest 106: a ratio of 1.49.
How La Grulla comparesderived from the figures above
Where La Grulla sits.
La Grulla ranks 257th of 1220 Texas places modeled here, at the 79th percentile. Its 1,579 kWh per kW is above the Texas median of 1,515. The strongest months are August, July, June and the weakest are January, December, November; output peaks in August and bottoms out in January. In all, 28.9% of the year arrives in June, July and August, less than the 29.3% of the median place.
Closest modeled neighbors
- Sullivan City, 9 km east: 1,588 kWh per kW, 9 more than La Grulla.
- La Joya, 17 km east: 1,577 kWh per kW, 2 less than La Grulla.
- Rio Grande City, 21 km northwest: 1,589 kWh per kW, 10 more than La Grulla.
- Penitas, 21 km east: 1,582 kWh per kW, 3 more than La Grulla.
- Palmview, 27 km east: 1,591 kWh per kW, 12 more than La Grulla.
- Mission, 33 km east: 1,598 kWh per kW, 19 more than La Grulla.
- Alton, 34 km east: 1,570 kWh per kW, 9 less than La Grulla.
- Escobares, 35 km northwest: 1,627 kWh per kW, 48 more than La Grulla.
- Palmhurst, 35 km east: 1,571 kWh per kW, 8 less than La Grulla.
Against San Antonio
The nearest of the six largest modeled places is San Antonio, 355 km to the north, at 1,505 kWh per kW. La Grulla models 74 kWh per kW (4.9%) above it. La Grulla lies 3.19 degrees of latitude south of San Antonio, and the sun stands higher in the sky the further south you go, which matches its higher modeled output. The two weather stations sit a similar distance from their points (2.4 km and 2.2 km), so station distance does little to explain the gap, and the weather record does the rest.
The second-nearest large place is Austin, 457 km north, where the same model gives 1,483 kWh per kW, so La Grulla runs 96 above that figure. Against the Texas median place month by month, La Grulla runs at least 2% higher in January, February, March, April, August, October, November, December.
Electricity in Starr CountyEIA-861
Electricity prices nearby
EIA lists AEP Texas Central in this county. Where La Grulla is on AEP Texas Central's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of La Grulla 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 1,579 kWh at $242 per kW a year, plain multiplication and not a savings estimate or an offer.
Also listed in the county
- Magic Valley Electric Coop Inc: 10.51¢ per kWh, a bundled average, 129,596 residential customers across 6 counties.
- Medina Electric Coop, Inc: 12.54¢ per kWh, a bundled average, 30,778 residential customers across 17 counties.
- AEP Texas Central Company: 5.91¢ per kWh, delivery charges only, before the retail energy price, 793,896 residential customers across 44 counties.
These utilities serve other parts of the county, which can include parts of La Grulla. 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 La Grulla 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 $243 per kW a year as plain multiplication.
PVWatts v8station 652813
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 105.9 |
| February | 119.3 |
| March | 128.8 |
| April | 140.1 |
| May | 141.0 |
| June | 146.8 |
| July | 152.3 |
| August | 158.0 |
| September | 133.9 |
| October | 129.7 |
| November | 115.0 |
| December | 108.2 |
| Year | 1,579 |
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 26.27, -98.65 (La Grulla, population 1,237). Weather: typical-year data from station 652813, 2.4 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.
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