Sun on a roof in Bertram.

How Bertram comparesderived from the figures above

Where Bertram sits.

Bertram ranks 389th of 1220 Texas places modeled here, at the 68th percentile. Its 1,544 kWh per kW is above the Texas median of 1,515. The strongest months are August, July, June and the weakest are December, February, January; output peaks in August and bottoms out in December. In all, 29.1% of the year arrives in June, July and August, less than the 29.3% of the median place.

Closest modeled neighbors

• Liberty Hill, 17 km southeast: 1,527 kWh per kW, 17 less than Bertram.
• Burnet, 17 km west: 1,540 kWh per kW, 4 less than Bertram.
• Leander, 27 km southeast: 1,532 kWh per kW, 12 less than Bertram.
• Florence, 28 km northeast: 1,516 kWh per kW, 28 less than Bertram.
• Marble Falls, 29 km southwest: 1,507 kWh per kW, 37 less than Bertram.
• Meadowlakes, 30 km southwest: 1,533 kWh per kW, 11 less than Bertram.
• Double Horn, 31 km southwest: 1,517 kWh per kW, 27 less than Bertram.
• Jonestown, 31 km southeast: 1,492 kWh per kW, 52 less than Bertram.
• Cottonwood Shores, 33 km southwest: 1,527 kWh per kW, 17 less than Bertram.

Against Austin

The nearest of the six largest modeled places is Austin, 57 km to the southeast, at 1,483 kWh per kW. Bertram models 61 kWh per kW (4.1%) above it. Bertram lies 0.44 degrees of latitude north of Austin, which on sun angle alone would point the other way, so clouds, haze and the weather station's record carry the difference. The two weather stations sit a similar distance from their points (1.1 km and 1.5 km), so station distance does little to explain the gap, and the weather record does the rest.

The second-nearest large place is San Antonio, 149 km south, where the same model gives 1,505 kWh per kW, so Bertram runs 39 above that figure. Against the Texas median place month by month, Bertram runs at least 2% higher in January, February, March, April, August, November.

Electricity in Burnet CountyEIA-861

Electricity prices nearby

EIA lists Oncor Electric Delivery in this county. Where Bertram is on Oncor Electric Delivery's lines, homes buy energy from a retail electricity provider and the price depends on the plan. Parts of Bertram 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 1,544 kWh at $237 per kW a year, plain multiplication and not a savings estimate or an offer.

Also listed in the county

• Pedernales Electric Coop, Inc: 12.75¢ per kWh, a bundled average, 420,753 residential customers across 24 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 Bertram. 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 Bertram 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 $238 per kW a year as plain multiplication.