Selma, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Selma.
The PVWatts model puts a generic roof array in Selma at 1,524 kWh a year for each kW of panels, using typical-year weather from a station 2.9 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 Selma climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 151, weakest 99: a ratio of 1.53.
How Selma comparesderived from the figures above
Where Selma sits.
Selma ranks 520th of 1220 Texas places modeled here, at the 57th percentile. Its 1,524 kWh per kW is above the Texas median of 1,515. The strongest months are August, July, June and the weakest are December, January, February; output peaks in August and bottoms out in December. In all, 29.1% of the year arrives in June, July and August, less than the 29.3% of the median place.
Closest modeled neighbors
- Live Oak, 4 km southwest: 1,514 kWh per kW, 10 less than Selma.
- Universal City, 5 km south: 1,516 kWh per kW, 8 less than Selma.
- Garden Ridge, 6 km northeast: 1,502 kWh per kW, 22 less than Selma.
- Schertz, 8 km southeast: 1,502 kWh per kW, 22 less than Selma.
- Converse, 9 km south: 1,511 kWh per kW, 13 less than Selma.
- Cibolo, 10 km east: 1,496 kWh per kW, 28 less than Selma.
- Windcrest, 11 km southwest: 1,510 kWh per kW, 14 less than Selma.
- Santa Clara, 15 km east: 1,508 kWh per kW, 16 less than Selma.
- Kirby, 16 km southwest: 1,495 kWh per kW, 29 less than Selma.
Against San Antonio
The nearest of the six largest modeled places is San Antonio, 24 km to the southwest, at 1,505 kWh per kW. Selma models 19 kWh per kW (1.3%) above it. At 0.13 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 (2.9 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, 96 km northeast, where the same model gives 1,483 kWh per kW, so Selma runs 41 above that figure. Against the Texas median place month by month, Selma runs at least 2% higher in January, February, March, November, December. It runs at least 2% lower in April, May, June.
Electricity in Bexar County, Comal County, Guadalupe CountyEIA-861
Electricity prices nearby
EIA lists AEP Texas Central in this county. Where Selma is on AEP Texas Central's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Selma 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 1,524 kWh at $233 per kW a year, plain multiplication and not a savings estimate or an offer.
Also listed in the county
- City of San Antonio: 12.4¢ per kWh, a bundled average, 888,946 residential customers across 8 counties.
- Pedernales Electric Coop, Inc: 12.75¢ per kWh, a bundled average, 420,753 residential customers across 24 counties.
- Bluebonnet Electric Coop, Inc: 11.59¢ per kWh, a bundled average, 119,030 residential customers across 14 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 Selma. 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 Selma 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 $235 per kW a year as plain multiplication.
PVWatts v8station 662625
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 105.3 |
| February | 107.9 |
| March | 132.2 |
| April | 132.2 |
| May | 138.0 |
| June | 142.1 |
| July | 150.4 |
| August | 151.0 |
| September | 132.9 |
| October | 123.3 |
| November | 110.0 |
| December | 99.0 |
| Year | 1,524 |
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 29.59, -98.32 (Selma, population 11,900). Weather: typical-year data from station 662625, 2.9 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.