Sun on a roof in Richardson.

How Richardson comparesderived from the figures above

Where Richardson sits.

Richardson ranks 40th of 157 Texas places modeled here, at the 75th percentile. Its 1,540 kWh per kW is above the Texas median of 1,518. The strongest months are July, August, June and the weakest are December, February, January; output peaks in July and bottoms out in December. In all, 30.0% of the year arrives in June, July and August, more than the 29.4% of the median place.

Closest modeled neighbors

• Plano, 10 km northwest: 1,527 kWh per kW, 13 less than Richardson.
• Garland, 10 km southeast: 1,522 kWh per kW, 18 less than Richardson.
• Murphy, 11 km northeast: 1,506 kWh per kW, 34 less than Richardson.
• Sachse, 12 km east: 1,507 kWh per kW, 33 less than Richardson.
• University Park, 16 km southwest: 1,512 kWh per kW, 28 less than Richardson.
• Rowlett, 16 km east: 1,517 kWh per kW, 23 less than Richardson.
• Allen, 16 km north: 1,530 kWh per kW, 10 less than Richardson.
• Farmers Branch, 16 km west: 1,503 kWh per kW, 37 less than Richardson.
• Carrollton, 18 km west: 1,564 kWh per kW, 24 more than Richardson.

Against Dallas

The nearest of the six largest modeled places is Dallas, 21 km to the south, at 1,500 kWh per kW. Richardson models 40 kWh per kW (2.7%) above it. At 0.18 degrees of latitude apart, the two sit at almost the same sun angle, so geometry explains little. The weather station for Richardson is 0.9 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, 63 km west, where the same model gives 1,535 kWh per kW, so Richardson runs 5 above that figure. Against the Texas median place month by month, Richardson runs at least 2% higher in January, June, July, September, December.

Electricity in Dallas County, Collin CountyEIA-861

Electricity prices nearby

EIA lists Oncor Electric Delivery and Texas-New Mexico Power in this county. Where Richardson is on Oncor Electric Delivery and Texas-New Mexico Power's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Richardson 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 1,540 kWh at $236 per kW a year, plain multiplication and not a savings estimate or an offer.

Also listed in the county

• Denton County Elec Coop, Inc: 13.18¢ per kWh, a bundled average, 310,805 residential customers across 6 counties.
• Grayson-Collin Elec Coop, Inc: 17.04¢ per kWh, a bundled average, 97,950 residential customers across 4 counties.
• Farmers Electric Coop, Inc: 11.95¢ per kWh, a bundled average, 88,221 residential customers across 12 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 Richardson. 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 Richardson 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 $238 per kW a year as plain multiplication.