Sun on a roof in Round Rock.

How Round Rock comparesderived from the figures above

Where Round Rock sits.

Round Rock ranks 68th of 157 Texas places modeled here, at the 57th percentile. Its 1,522 kWh per kW is above the Texas median of 1,518. The strongest months are August, July, May and the weakest are December, February, January; output peaks in August and bottoms out in December. In all, 29.4% of the year arrives in June, July and August, about the same than the 29.4% of the median place.

Closest modeled neighbors

• Pflugerville, 11 km southeast: 1,495 kWh per kW, 27 less than Round Rock.
• Hutto, 12 km east: 1,528 kWh per kW, 6 more than Round Rock.
• Cedar Park, 15 km west: 1,521 kWh per kW, 1 less than Round Rock.
• Georgetown, 16 km north: 1,518 kWh per kW, 4 less than Round Rock.
• Leander, 20 km west: 1,532 kWh per kW, 10 more than Round Rock.
• Manor, 22 km southeast: 1,483 kWh per kW, 39 less than Round Rock.
• Austin, 27 km south: 1,483 kWh per kW, 39 less than Round Rock.
• Harker Heights, 59 km north: 1,518 kWh per kW, 4 less than Round Rock.
• Belton, 60 km north: 1,519 kWh per kW, 3 less than Round Rock.

Against Austin

The nearest of the six largest modeled places is Austin, 27 km to the south, at 1,483 kWh per kW. Round Rock models 39 kWh per kW (2.6%) above it. At 0.23 degrees of latitude apart, the two sit at almost the same sun angle, so geometry explains little. The weather station for Round Rock is 0.0 km from the modeled point, against 1.5 km for Austin, so part of the gap can come from which station's typical year was used.

The second-nearest large place is San Antonio, 145 km southwest, where the same model gives 1,505 kWh per kW, so Round Rock runs 17 above that figure. Against the Texas median place month by month, Round Rock runs at least 2% higher in January, August. It runs at least 2% lower in June.

Electricity in Travis County, Williamson CountyEIA-861

Electricity prices nearby

EIA lists Oncor Electric Delivery in this county. Where Round Rock is on Oncor Electric Delivery's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Round Rock 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 1,522 kWh at $233 per kW a year, plain multiplication and not a savings estimate or an offer.

Also listed in the county

• Austin Energy: 13.14¢ per kWh, a bundled average, 522,446 residential customers across 2 counties.
• Pedernales Electric Coop, Inc: 12.75¢ per kWh, a bundled average, 420,753 residential customers across 24 counties.
• Bluebonnet Electric Coop, Inc: 11.59¢ per kWh, a bundled average, 119,030 residential customers across 14 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 Round Rock. 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 Round Rock 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 $235 per kW a year as plain multiplication.