La Marque, TXLocal --:--Sun now --Daylight today --
Sun on a roof in La Marque.
The PVWatts model puts a generic roof array in La Marque at 1,460 kWh a year for each kW of panels, using typical-year weather from a station 1.0 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 La Marque climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 144, weakest 87: a ratio of 1.65.
How La Marque comparesderived from the figures above
Where La Marque sits.
La Marque ranks 979th of 1220 Texas places modeled here, at the 20th percentile. Its 1,460 kWh per kW is below the Texas median of 1,515. The strongest months are May, July, June and the weakest are December, February, January; output peaks in May and bottoms out in December. In all, 28.9% of the year arrives in June, July and August, less than the 29.3% of the median place.
Closest modeled neighbors
- Bayou Vista, 7 km southeast: 1,502 kWh per kW, 42 more than La Marque.
- Hitchcock, 10 km south: 1,501 kWh per kW, 41 more than La Marque.
- Santa Fe, 11 km west: 1,458 kWh per kW, 2 less than La Marque.
- Tiki Island, 11 km southeast: 1,490 kWh per kW, 30 more than La Marque.
- Dickinson, 11 km northwest: 1,457 kWh per kW, 3 less than La Marque.
- Texas City, 12 km northeast: 1,464 kWh per kW, 4 more than La Marque.
- League City, 18 km northwest: 1,440 kWh per kW, 20 less than La Marque.
- Kemah, 18 km north: 1,450 kWh per kW, 10 less than La Marque.
- Clear Lake Shores, 19 km north: 1,450 kWh per kW, 10 less than La Marque.
Against Houston
The nearest of the six largest modeled places is Houston, 61 km to the northwest, at 1,422 kWh per kW. La Marque models 38 kWh per kW (2.7%) above it. La Marque lies 0.42 degrees of latitude south of Houston, and the sun stands higher in the sky the further south you go, which matches its higher modeled output. The weather station for La Marque is 1.0 km from the modeled point, against 2.4 km for Houston, so part of the gap can come from which station's typical year was used.
The second-nearest large place is Austin, 286 km west, where the same model gives 1,483 kWh per kW, so La Marque runs 23 below that figure. Against the Texas median place month by month, La Marque runs at least 2% higher in November. It runs at least 2% lower in January, February, April, June, July, August, September, December.
Electricity in Galveston CountyEIA-861
Electricity prices nearby
EIA lists CenterPoint Energy Houston Electric and Texas-New Mexico Power in this county. Where La Marque is on CenterPoint Energy Houston Electric and Texas-New Mexico Power's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of La Marque 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 1,460 kWh at $224 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.
- 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 La Marque. 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 La Marque 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 $225 per kW a year as plain multiplication.
PVWatts v8station 742862
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 100.1 |
| February | 94.6 |
| March | 124.8 |
| April | 126.0 |
| May | 144.3 |
| June | 141.7 |
| July | 144.3 |
| August | 136.2 |
| September | 123.9 |
| October | 124.7 |
| November | 112.3 |
| December | 87.3 |
| Year | 1,460 |
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 29.37, -94.99 (La Marque, population 20,194). Weather: typical-year data from station 742862, 1.0 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.