Old River-Winfree, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Old River-Winfree.
The PVWatts model puts a generic roof array in Old River-Winfree at 1,449 kWh a year for each kW of panels, using typical-year weather from a station 2.4 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 Old River-Winfree climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 142, weakest 92: a ratio of 1.53.
How Old River-Winfree comparesderived from the figures above
Where Old River-Winfree sits.
Old River-Winfree ranks 1036th of 1220 Texas places modeled here, at the 15th percentile. Its 1,449 kWh per kW is below the Texas median of 1,515. The strongest months are June, May, July and the weakest are December, February, January; output peaks in June and bottoms out in December. In all, 28.3% of the year arrives in June, July and August, less than the 29.3% of the median place.
Closest modeled neighbors
- Mont Belvieu, 4 km southwest: 1,451 kWh per kW, 2 more than Old River-Winfree.
- Cove, 7 km south: 1,462 kWh per kW, 13 more than Old River-Winfree.
- Beach City, 15 km south: 1,482 kWh per kW, 33 more than Old River-Winfree.
- Baytown, 18 km southwest: 1,416 kWh per kW, 33 less than Old River-Winfree.
- Anahuac, 18 km southeast: 1,449 kWh per kW, 0 the same as Old River-Winfree.
- Dayton, 19 km northwest: 1,427 kWh per kW, 22 less than Old River-Winfree.
- Liberty, 19 km north: 1,401 kWh per kW, 48 less than Old River-Winfree.
- Ames, 22 km northeast: 1,415 kWh per kW, 34 less than Old River-Winfree.
- Kenefick, 26 km north: 1,455 kWh per kW, 6 more than Old River-Winfree.
Against Houston
The nearest of the six largest modeled places is Houston, 55 km to the west, at 1,422 kWh per kW. Old River-Winfree models 27 kWh per kW (1.9%) above it. At 0.08 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 (2.4 km and 2.4 km), so station distance does little to explain the gap, and the weather record does the rest.
The second-nearest large place is Austin, 285 km west, where the same model gives 1,483 kWh per kW, so Old River-Winfree runs 34 below that figure. It runs at least 2% lower in January, February, April, May, June, July, August, September, December.
Electricity in Liberty County, Chambers CountyEIA-861
Electricity prices nearby
EIA lists CenterPoint Energy Houston Electric in this county. Where Old River-Winfree is on CenterPoint Energy Houston Electric's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Old River-Winfree 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 1,449 kWh at $222 per kW a year, plain multiplication and not a savings estimate or an offer.
Also listed in the county
- Entergy Texas Inc.: 13.89¢ per kWh, a bundled average, 469,094 residential customers across 27 counties.
- Sam Houston Electric Coop Inc: 14.18¢ per kWh, a bundled average, 88,424 residential customers across 10 counties.
- CenterPoint Energy: 5.41¢ per kWh, delivery charges only, before the retail energy price, 2,529,039 residential customers across 12 counties.
These utilities serve other parts of the county, which can include parts of Old River-Winfree. 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 Old River-Winfree 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 $223 per kW a year as plain multiplication.
PVWatts v8station 746407
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 98.5 |
| February | 94.4 |
| March | 126.2 |
| April | 132.2 |
| May | 139.0 |
| June | 141.5 |
| July | 136.8 |
| August | 132.1 |
| September | 123.4 |
| October | 124.7 |
| November | 107.5 |
| December | 92.4 |
| Year | 1,449 |
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 29.87, -94.83 (Old River-Winfree, population 1,383). Weather: typical-year data from station 746407, 2.4 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.