Johnson City, TXLocal --:--Sun now --Daylight today --
Sun on a roof in Johnson City.
The PVWatts model puts a generic roof array in Johnson City at 1,530 kWh a year for each kW of panels, using typical-year weather from a station 2.4 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 Johnson City climbs and falls, and the modeled output follows it.
kWh per kW DC, modeled by PVWatts. Best month 156, weakest 100: a ratio of 1.56.
How Johnson City comparesderived from the figures above
Where Johnson City sits.
Johnson City ranks 475th of 1220 Texas places modeled here, at the 61st percentile. Its 1,530 kWh per kW is above the Texas median of 1,515. The strongest months are August, July, June and the weakest are November, December, January; output peaks in August and bottoms out in November. In all, 29.6% of the year arrives in June, July and August, more than the 29.3% of the median place.
Closest modeled neighbors
- Round Mountain, 14 km north: 1,553 kWh per kW, 23 more than Johnson City.
- Blanco, 19 km south: 1,536 kWh per kW, 6 more than Johnson City.
- Horseshoe Bay, 30 km north: 1,546 kWh per kW, 16 more than Johnson City.
- Double Horn, 31 km northeast: 1,517 kWh per kW, 13 less than Johnson City.
- Dripping Springs, 32 km east: 1,511 kWh per kW, 19 less than Johnson City.
- Cottonwood Shores, 33 km north: 1,527 kWh per kW, 3 less than Johnson City.
- Meadowlakes, 34 km north: 1,533 kWh per kW, 3 more than Johnson City.
- Marble Falls, 35 km north: 1,507 kWh per kW, 23 less than Johnson City.
- Sunrise Beach Village, 36 km north: 1,526 kWh per kW, 4 less than Johnson City.
Against Austin
The nearest of the six largest modeled places is Austin, 63 km to the east, at 1,483 kWh per kW. Johnson City models 47 kWh per kW (3.2%) above it. At 0.03 degrees of latitude apart, the two sit at almost the same sun angle, so geometry explains little. The two weather stations sit a similar distance from their points (2.4 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, 91 km south, where the same model gives 1,505 kWh per kW, so Johnson City runs 25 above that figure. Against the Texas median place month by month, Johnson City runs at least 2% higher in January, February, April, August, December. It runs at least 2% lower in November.
Electricity in Blanco CountyEIA-861
Electricity prices nearby
Providers listed in the county
- Pedernales Electric Coop, Inc: 12.75¢ per kWh, a bundled average, 420,753 residential customers across 24 counties.
- Central Texas Elec Coop, Inc: 12.17¢ per kWh, a bundled average, 40,305 residential customers across 11 counties.
They are the largest bundled providers 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. Priced at the first provider's average, the modeled 1,530 kWh would come to $195 per kW a year, plain multiplication and not a savings estimate.
Modeled estimateruns in your browser
Size the array, see the kWh.
Scale the Johnson City 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 $236 per kW a year as plain multiplication.
PVWatts v8station 659297
Month by month, per kW.
| Month | kWh per kW |
|---|---|
| January | 106.2 |
| February | 106.4 |
| March | 124.0 |
| April | 139.0 |
| May | 140.4 |
| June | 146.0 |
| July | 150.7 |
| August | 155.8 |
| September | 134.9 |
| October | 126.3 |
| November | 99.9 |
| December | 100.4 |
| Year | 1,530 |
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 30.27, -98.41 (Johnson City, population 2,092). Weather: typical-year data from station 659297, 2.4 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.