Karnes City, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Karnes City.
The PVWatts model puts a generic roof array in Karnes City at 1,509 kWh a year for each kW of panels, using typical-year weather from a station 0.0 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 Karnes City climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 155, weakest 94: a ratio of 1.64.
How Karnes City comparesderived from the figures above
Where Karnes City sits.
Karnes City ranks 664th of 1220 Texas places modeled here, at the 46th percentile. Its 1,509 kWh per kW is below the Texas median of 1,515. The strongest months are July, August, June and the weakest are February, December, January; output peaks in July and bottoms out in February. In all, 29.6% of the year arrives in June, July and August, more than the 29.3% of the median place.
Closest modeled neighbors
- Kenedy, 10 km southeast: 1,505 kWh per kW, 4 less than Karnes City.
- Falls City, 15 km northwest: 1,513 kWh per kW, 4 more than Karnes City.
- Runge, 18 km east: 1,505 kWh per kW, 4 less than Karnes City.
- Poth, 27 km northwest: 1,485 kWh per kW, 24 less than Karnes City.
- Nordheim, 28 km east: 1,510 kWh per kW, 1 more than Karnes City.
- Floresville, 39 km northwest: 1,492 kWh per kW, 17 less than Karnes City.
- Yorktown, 39 km east: 1,500 kWh per kW, 9 less than Karnes City.
- Stockdale, 39 km north: 1,505 kWh per kW, 4 less than Karnes City.
- Nixon, 44 km north: 1,494 kWh per kW, 15 less than Karnes City.
Against San Antonio
The nearest of the six largest modeled places is San Antonio, 87 km to the northwest, at 1,505 kWh per kW. Karnes City models 4 kWh per kW (0.3%) above it. The two figures are within 1 percent, which is about the size of the difference you get from two neighboring weather stations alone, so this page's result is effectively the same as San Antonio's.
The second-nearest large place is Austin, 157 km north, where the same model gives 1,483 kWh per kW, so Karnes City runs 26 above that figure. Against the Texas median place month by month, Karnes City runs at least 2% higher in January, October. It runs at least 2% lower in February, March, April, May, September.
Electricity in Karnes CountyEIA-861
Electricity prices nearby
EIA lists AEP Texas Central in this county. Where Karnes City is on AEP Texas Central's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Karnes City 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 1,509 kWh at $231 per kW a year, plain multiplication and not a savings estimate or an offer.
Also listed in the county
- Guadalupe Valley Elec Coop Inc: 11.83¢ per kWh, a bundled average, 95,358 residential customers across 13 counties.
- City of Floresville: 12.23¢ per kWh, a bundled average, 16,149 residential customers across 2 counties.
- Karnes Electric Coop Inc: 10.25¢ per kWh, a bundled average, 13,599 residential customers across 12 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 Karnes City. 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 Karnes City 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 $232 per kW a year as plain multiplication.
PVWatts v8station 673634
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 108.1 |
| February | 94.1 |
| March | 122.0 |
| April | 126.1 |
| May | 140.0 |
| June | 143.5 |
| July | 154.7 |
| August | 148.1 |
| September | 130.0 |
| October | 136.6 |
| November | 108.2 |
| December | 97.3 |
| Year | 1,509 |
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 28.89, -97.9 (Karnes City, population 3,620). Weather: typical-year data from station 673634, 0.0 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.