Port Arthur, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Port Arthur.
The PVWatts model puts a generic roof array in Port Arthur at 1,428 kWh a year for each kW of panels, using typical-year weather from a station 1.5 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 Port Arthur climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 139, weakest 87: a ratio of 1.59.
How Port Arthur comparesderived from the figures above
Where Port Arthur sits.
Port Arthur ranks 146th of 157 Texas places modeled here, at the 8th percentile. Its 1,428 kWh per kW is below the Texas median of 1,518. The strongest months are May, June, July and the weakest are December, February, January; output peaks in May and bottoms out in December. In all, 28.5% of the year arrives in June, July and August, less than the 29.4% of the median place.
Closest modeled neighbors
- Beaumont, 32 km northwest: 1,401 kWh per kW, 27 less than Port Arthur.
- Baytown, 105 km west: 1,416 kWh per kW, 12 less than Port Arthur.
- Texas City, 110 km southwest: 1,464 kWh per kW, 36 more than Port Arthur.
- La Porte, 115 km west: 1,461 kWh per kW, 33 more than Port Arthur.
- Deer Park, 121 km west: 1,467 kWh per kW, 39 more than Port Arthur.
- La Marque, 122 km southwest: 1,460 kWh per kW, 32 more than Port Arthur.
- Dickinson, 124 km southwest: 1,457 kWh per kW, 29 more than Port Arthur.
- Pasadena, 125 km west: 1,479 kWh per kW, 51 more than Port Arthur.
- League City, 126 km west: 1,440 kWh per kW, 12 more than Port Arthur.
Against Houston
The nearest of the six largest modeled places is Houston, 145 km to the west, at 1,422 kWh per kW. Port Arthur models 6 kWh per kW (0.4%) 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 Houston's.
The second-nearest large place is Austin, 374 km west, where the same model gives 1,483 kWh per kW, so Port Arthur runs 55 below that figure. It runs at least 2% lower in January, February, April, May, June, July, August, September, October, November, December.
Electricity in Jefferson County, Orange CountyEIA-861
Electricity prices nearby
Providers listed in the county
- Entergy Texas Inc.: 13.89¢ per kWh, a bundled average, 469,094 residential customers across 27 counties.
- Jasper-Newton Elec Coop, Inc: 14.1¢ per kWh, a bundled average, 21,316 residential customers across 5 counties.
They are the largest bundled providers 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. Priced at the first provider's average, the modeled 1,428 kWh would come to $198 per kW a year, plain multiplication and not a savings estimate.
Modeled estimateruns in your browser
Size the array, see the kWh.
Scale the Port Arthur 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 $221 per kW a year as plain multiplication.
PVWatts v8station 764490
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 98.0 |
| February | 91.7 |
| March | 125.9 |
| April | 125.6 |
| May | 138.7 |
| June | 136.6 |
| July | 135.8 |
| August | 134.7 |
| September | 131.4 |
| October | 119.6 |
| November | 102.3 |
| December | 87.3 |
| Year | 1,428 |
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 29.9, -93.89 (Port Arthur, population 55,799). Weather: typical-year data from station 764490, 1.5 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.