Rate & Roof

Terrell, TXLocal --:--Sun now --Daylight today --

Sun on a roof in Terrell.

The PVWatts model puts a generic roof array in Terrell at 1,479 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 Terrell climbs and falls, and the modeled output follows it.

Sun elevation through the day over Terrell The sun's path at latitude 32.73, computed from solar geometry. The upper dotted arc is the June solstice and the lower one the December solstice; the solid arc is the month being shown.
MonthAll 12 monthsNoon sun-Daylight-Modeled output per kW1,479 kWh

kWh per kW DC, modeled by PVWatts. Best month 154, weakest 94: a ratio of 1.65.

How Terrell comparesderived from the figures above

Where Terrell sits.

Terrell ranks 121st of 157 Texas places modeled here, at the 24th percentile. Its 1,479 kWh per kW is below the Texas median of 1,518. The strongest months are July, June, August and the weakest are December, January, February; output peaks in July and bottoms out in December. In all, 30.5% of the year arrives in June, July and August, more than the 29.4% of the median place.

Closest modeled neighbors

  • Forney, 14 km west: 1,514 kWh per kW, 35 more than Terrell.
  • Rockwall, 25 km northwest: 1,524 kWh per kW, 45 more than Terrell.
  • Seagoville, 25 km west: 1,508 kWh per kW, 29 more than Terrell.
  • Fate, 26 km north: 1,497 kWh per kW, 18 more than Terrell.
  • Mesquite, 26 km west: 1,488 kWh per kW, 9 more than Terrell.
  • Royse City, 28 km north: 1,479 kWh per kW, 0 the same as Terrell.
  • Balch Springs, 30 km west: 1,505 kWh per kW, 26 more than Terrell.
  • Rowlett, 31 km northwest: 1,517 kWh per kW, 38 more than Terrell.
  • Garland, 37 km northwest: 1,522 kWh per kW, 43 more than Terrell.

Against Dallas

The nearest of the six largest modeled places is Dallas, 44 km to the west, at 1,500 kWh per kW. Terrell models 21 kWh per kW (1.4%) below it. At 0.06 degrees of latitude apart, the two sit at almost the same sun angle, so geometry explains little. The weather station for Terrell is 0.0 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, 98 km west, where the same model gives 1,535 kWh per kW, so Terrell runs 56 below that figure. Against the Texas median place month by month, Terrell runs at least 2% higher in June. It runs at least 2% lower in January, February, April, May, August, September, October, November, December.

Electricity in Kaufman CountyEIA-861

Electricity prices nearby

EIA lists Oncor Electric Delivery in this county. Where Terrell is on Oncor Electric Delivery's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Terrell 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 1,479 kWh at $227 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.
  • 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 Terrell. 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 Terrell 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 $229 per kW a year as plain multiplication.

Modeled estimate

Modeled output, kWh a year

8,874 kWh/yr

About - kWh in an average month. Priced at the chosen rate that energy comes to - a year, by multiplication only.

Assumes the same tilt, direction and equipment as the model below. Real output depends on the roof, shade, equipment and weather.

PVWatts v8station 713757

Month by month, per kW.

Modeled AC output in Terrell, Texas, kWh per kW DC, typical weather year
MonthkWh per kW
January96.3
February97.3
March124.8
April128.1
May139.2
June150.4
July154.0
August146.5
September129.4
October118.5
November101.0
December93.6
Year1,479

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 32.73, -96.3 (Terrell, population 22,977). Weather: typical-year data from station 713757, 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.

Texas electricity prices and providers

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.

Email updatesdouble opt-in

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.

Read this first

  • A model estimate for a generic system at this point, not a measurement and not a promise of output.
  • Shading, roof pitch, equipment and local rates will differ.
  • All prices on this site are in cents per kWh unless marked otherwise. Bills are US dollars per month.

Credits and notices

The credits and notices that each data source requires are printed word for word with that source in the Sources list below.