Double Horn, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Double Horn.
The PVWatts model puts a generic roof array in Double Horn at 1,517 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 Double Horn climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 152, weakest 97: a ratio of 1.57.
How Double Horn comparesderived from the figures above
Where Double Horn sits.
Double Horn ranks 582nd of 1220 Texas places modeled here, at the 52nd percentile. Its 1,517 kWh per kW is above the Texas median of 1,515. The strongest months are August, July, June and the weakest are November, December, February; output peaks in August and bottoms out in November. In all, 29.5% of the year arrives in June, July and August, more than the 29.3% of the median place.
Closest modeled neighbors
- Marble Falls, 9 km northwest: 1,507 kWh per kW, 10 less than Double Horn.
- Meadowlakes, 10 km northwest: 1,533 kWh per kW, 16 more than Double Horn.
- Cottonwood Shores, 12 km northwest: 1,527 kWh per kW, 10 more than Double Horn.
- Horseshoe Bay, 16 km west: 1,546 kWh per kW, 29 more than Double Horn.
- Granite Shoals, 18 km northwest: 1,524 kWh per kW, 7 more than Double Horn.
- Round Mountain, 18 km southwest: 1,553 kWh per kW, 36 more than Double Horn.
- Briarcliff, 20 km southeast: 1,498 kWh per kW, 19 less than Double Horn.
- Highland Haven, 21 km northwest: 1,524 kWh per kW, 7 more than Double Horn.
- Sunrise Beach Village, 22 km northwest: 1,526 kWh per kW, 9 more than Double Horn.
Against Austin
The nearest of the six largest modeled places is Austin, 50 km to the southeast, at 1,483 kWh per kW. Double Horn models 34 kWh per kW (2.3%) above it. At 0.2 degrees of latitude apart, the two sit at almost the same sun angle, so geometry explains little. The two weather stations sit a similar distance from their points (1.1 km and 1.5 km), so station distance does little to explain the gap, and the weather record does the rest.
The second-nearest large place is San Antonio, 119 km south, where the same model gives 1,505 kWh per kW, so Double Horn runs 12 above that figure. Against the Texas median place month by month, Double Horn runs at least 2% higher in January, March, December. It runs at least 2% lower in May, November.
Modeled estimateruns in your browser
Size the array, see the kWh.
Scale the Double Horn 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 $234 per kW a year as plain multiplication.
PVWatts v8station 664509
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 106.3 |
| February | 99.2 |
| March | 132.2 |
| April | 138.5 |
| May | 137.5 |
| June | 145.3 |
| July | 150.1 |
| August | 151.7 |
| September | 135.1 |
| October | 125.7 |
| November | 96.7 |
| December | 98.9 |
| Year | 1,517 |
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 30.5, -98.22 (Double Horn, population 282). Weather: typical-year data from station 664509, 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.