Dennis, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Dennis.
The PVWatts model puts a generic roof array in Dennis at 1,554 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 Dennis climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 152, weakest 94: a ratio of 1.63.
How Dennis comparesderived from the figures above
Where Dennis sits.
Dennis ranks 332nd of 1220 Texas places modeled here, at the 73rd percentile. Its 1,554 kWh per kW is above the Texas median of 1,515. The strongest months are June, May, August and the weakest are December, February, January; output peaks in June and bottoms out in December. In all, 28.8% of the year arrives in June, July and August, less than the 29.3% of the median place.
Closest modeled neighbors
- Lipan, 14 km southwest: 1,571 kWh per kW, 17 more than Dennis.
- Millsap, 17 km northwest: 1,556 kWh per kW, 2 more than Dennis.
- Cool, 22 km north: 1,555 kWh per kW, 1 more than Dennis.
- Stockton Bend, 22 km southeast: 1,567 kWh per kW, 13 more than Dennis.
- Weatherford, 22 km northeast: 1,563 kWh per kW, 9 more than Dennis.
- Tolar, 25 km south: 1,574 kWh per kW, 20 more than Dennis.
- Granbury, 25 km southeast: 1,571 kWh per kW, 17 more than Dennis.
- Mineral Wells, 27 km northwest: 1,551 kWh per kW, 3 less than Dennis.
- Annetta, 27 km east: 1,546 kWh per kW, 8 less than Dennis.
Against Fort Worth
The nearest of the six largest modeled places is Fort Worth, 58 km to the east, at 1,535 kWh per kW. Dennis models 19 kWh per kW (1.2%) above it. At 0.17 degrees of latitude apart, the two sit at almost the same sun angle, so geometry explains little. The weather station for Dennis is 0.0 km from the modeled point, against 1.5 km for Fort Worth, so part of the gap can come from which station's typical year was used.
The second-nearest large place is Dallas, 111 km east, where the same model gives 1,500 kWh per kW, so Dennis runs 54 above that figure. Against the Texas median place month by month, Dennis runs at least 2% higher in January, February, March, April, May, June, September, November. It runs at least 2% lower in July, December.
Modeled estimateruns in your browser
Size the array, see the kWh.
Scale the Dennis 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 $239 per kW a year as plain multiplication.
PVWatts v8station 672467
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 111.0 |
| February | 106.9 |
| March | 129.4 |
| April | 138.6 |
| May | 149.5 |
| June | 152.5 |
| July | 147.2 |
| August | 148.5 |
| September | 137.9 |
| October | 127.0 |
| November | 112.3 |
| December | 93.5 |
| Year | 1,554 |
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 32.61, -97.94 (Dennis, population 843). Weather: typical-year data from station 672467, 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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