Mount Calm, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Mount Calm.
The PVWatts model puts a generic roof array in Mount Calm at 1,522 kWh a year for each kW of panels, using typical-year weather from a station 2.2 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 Mount Calm climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 154, weakest 98: a ratio of 1.57.
How Mount Calm comparesderived from the figures above
Where Mount Calm sits.
Mount Calm ranks 536th of 1220 Texas places modeled here, at the 56th percentile. Its 1,522 kWh per kW is above the Texas median of 1,515. The strongest months are July, June, August and the weakest are February, December, January; output peaks in July and bottoms out in February. In all, 30.1% of the year arrives in June, July and August, more than the 29.3% of the median place.
Closest modeled neighbors
- Penelope, 11 km northwest: 1,511 kWh per kW, 11 less than Mount Calm.
- Hubbard, 13 km northeast: 1,518 kWh per kW, 4 less than Mount Calm.
- Leroy, 14 km west: 1,509 kWh per kW, 13 less than Mount Calm.
- Malone, 18 km north: 1,506 kWh per kW, 16 less than Mount Calm.
- West, 20 km west: 1,513 kWh per kW, 9 less than Mount Calm.
- Dawson, 22 km northeast: 1,507 kWh per kW, 15 less than Mount Calm.
- Coolidge, 22 km east: 1,502 kWh per kW, 20 less than Mount Calm.
- Ross, 22 km west: 1,503 kWh per kW, 19 less than Mount Calm.
- Abbott, 23 km northwest: 1,533 kWh per kW, 11 more than Mount Calm.
Against Dallas
The nearest of the six largest modeled places is Dallas, 115 km to the north, at 1,500 kWh per kW. Mount Calm models 22 kWh per kW (1.5%) above it. Mount Calm lies 1.03 degrees of latitude south of Dallas, and the sun stands higher in the sky the further south you go, which matches its higher modeled output. The two weather stations sit a similar distance from their points (2.2 km and 2.4 km), so station distance does little to explain the gap, and the weather record does the rest.
The second-nearest large place is Fort Worth, 122 km north, where the same model gives 1,535 kWh per kW, so Mount Calm runs 13 below that figure. Against the Texas median place month by month, Mount Calm runs at least 2% higher in April, June, December. It runs at least 2% lower in February, May, November.
Electricity in Hill CountyEIA-861
Electricity prices nearby
EIA lists Oncor Electric Delivery and Texas-New Mexico Power in this county. Where Mount Calm 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 Mount Calm 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
- HILCO Electric Cooperative, Inc.: 14.82¢ per kWh, a bundled average, 27,850 residential customers across 5 counties.
- Navasota Valley Elec Coop, Inc: 16.26¢ per kWh, a bundled average, 19,861 residential customers across 9 counties.
- Navarro County Elec Coop, Inc: 12.92¢ per kWh, a bundled average, 19,029 residential customers across 5 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 Mount Calm. 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 Mount Calm 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 $234 per kW a year as plain multiplication.
PVWatts v8station 700915
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 102.8 |
| February | 97.9 |
| March | 123.8 |
| April | 139.7 |
| May | 137.3 |
| June | 153.2 |
| July | 153.6 |
| August | 151.9 |
| September | 131.4 |
| October | 126.0 |
| November | 104.6 |
| December | 100.3 |
| Year | 1,522 |
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 31.76, -96.88 (Mount Calm, population 319). Weather: typical-year data from station 700915, 2.2 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.