Duncanville, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Duncanville.
The PVWatts model puts a generic roof array in Duncanville at 1,523 kWh a year for each kW of panels, using typical-year weather from a station 0.9 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 Duncanville climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 155, weakest 97: a ratio of 1.6.
How Duncanville comparesderived from the figures above
Where Duncanville sits.
Duncanville ranks 66th of 157 Texas places modeled here, at the 59th percentile. Its 1,523 kWh per kW is above the Texas median of 1,518. The strongest months are July, June, August and the weakest are December, February, November; output peaks in July and bottoms out in December. In all, 30.1% of the year arrives in June, July and August, more than the 29.4% of the median place.
Closest modeled neighbors
- DeSoto, 7 km southeast: 1,525 kWh per kW, 2 more than Duncanville.
- Cedar Hill, 9 km southwest: 1,506 kWh per kW, 17 less than Duncanville.
- Grand Prairie, 11 km northwest: 1,516 kWh per kW, 7 less than Duncanville.
- Glenn Heights, 12 km southeast: 1,526 kWh per kW, 3 more than Duncanville.
- Lancaster, 14 km southeast: 1,511 kWh per kW, 12 less than Duncanville.
- Dallas, 20 km northeast: 1,500 kWh per kW, 23 less than Duncanville.
- Arlington, 20 km west: 1,559 kWh per kW, 36 more than Duncanville.
- Midlothian, 21 km south: 1,520 kWh per kW, 3 less than Duncanville.
- Mansfield, 22 km southwest: 1,517 kWh per kW, 6 less than Duncanville.
Against Dallas
The nearest of the six largest modeled places is Dallas, 20 km to the northeast, at 1,500 kWh per kW. Duncanville models 23 kWh per kW (1.5%) above it. At 0.14 degrees of latitude apart, the two sit at almost the same sun angle, so geometry explains little. The weather station for Duncanville is 0.9 km from the modeled point, against 2.4 km for Dallas, so part of the gap can come from which station's typical year was used.
The second-nearest large place is Fort Worth, 44 km west, where the same model gives 1,535 kWh per kW, so Duncanville runs 12 below that figure. Against the Texas median place month by month, Duncanville runs at least 2% higher in May, June, September. It runs at least 2% lower in April, November.
Electricity in Dallas CountyEIA-861
Electricity prices nearby
EIA lists Oncor Electric Delivery and Texas-New Mexico Power in this county. Where Duncanville is on Oncor Electric Delivery and Texas-New Mexico Power's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Duncanville 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 1,523 kWh at $233 per kW a year, plain multiplication and not a savings estimate or an offer.
Also listed in the county
- Farmers Electric Coop, Inc: 11.95¢ per kWh, a bundled average, 88,221 residential customers across 12 counties.
- Trinity Valley Elec Coop Inc: 12.24¢ per kWh, a bundled average, 82,224 residential customers across 6 counties.
- City of Garland: 13.68¢ per kWh, a bundled average, 70,627 residential customers across 1 county.
- 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 Duncanville. 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 Duncanville 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 15.47¢ per kWh. At that rate the modeled output is worth $236 per kW a year as plain multiplication.
PVWatts v8station 699791
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 101.6 |
| February | 100.7 |
| March | 123.5 |
| April | 132.1 |
| May | 149.2 |
| June | 152.1 |
| July | 154.6 |
| August | 151.0 |
| September | 138.2 |
| October | 122.2 |
| November | 100.9 |
| December | 96.7 |
| Year | 1,523 |
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 32.65, -96.91 (Duncanville, population 39,203). Weather: typical-year data from station 699791, 0.9 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.