Santa Cruz · Argentina · 46.54° S · 68.93° W
Solar position in Las Heras
Sun position, daylight and the best solar panel angle for Las Heras — computed for 46.54° S, 68.93° W, 324 m above sea level.
The sun right now
Sun in Las Heras today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:28 | sun 18° below horizon |
| Nautical dawn | 05:12 | 12° below |
| Civil dawn | 05:51 | 6° below |
| Sunrise | 06:23 | 108° ESE |
| Golden hour ends | 07:04 | sun 6° up |
| Solar noon | 13:20 | 55.4° high |
| Golden hour starts | 19:35 | sun 6° up |
| Sunset | 20:16 | 251° WSW |
| Civil dusk | 20:49 | 6° below |
| Nautical dusk | 21:28 | 12° below |
| Astronomical dusk | 22:12 | 18° below |
| Day length | 13 h 53 min | |
Sun path diagram for Las Heras
Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.
- June solstice
- Equinox
- December solstice
- Today
On the June solstice the sun reaches 20.1° at solar noon in Las Heras; on the December solstice only 66.9°. Sunrise swings from 56° NE in June to 126° SE in December — a 71° arc along the horizon.
Sunrise, sunset and sun height by month
Values for the 21st of each month, local clock time including daylight saving time.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:11 | 13:46 | 21:21 | 15 h 10 min | 63.3° |
| February | 06:59 | 13:49 | 20:38 | 13 h 39 min | 53.8° |
| March | 07:39 | 13:42 | 19:45 | 12 h 06 min | 43.0° |
| April | 08:20 | 13:34 | 18:47 | 10 h 26 min | 31.5° |
| May | 08:58 | 13:32 | 18:05 | 9 h 08 min | 23.2° |
| June | 09:20 | 13:37 | 17:54 | 8 h 34 min | 20.1° |
| July | 09:09 | 13:42 | 18:15 | 9 h 07 min | 23.1° |
| August | 08:25 | 13:39 | 18:52 | 10 h 27 min | 31.5° |
| September | 07:26 | 13:29 | 19:31 | 12 h 05 min | 43.0° |
| October | 06:29 | 13:20 | 20:12 | 13 h 43 min | 54.3° |
| November | 05:45 | 13:21 | 20:58 | 15 h 12 min | 63.5° |
| December | 05:38 | 13:33 | 21:28 | 15 h 50 min | 66.9° |
A year of daylight in Las Heras
Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.
Best solar panel angle in Las Heras
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
40°collects the most energy over a year: 1643 kWh per kWp.
71°gives the most in the darkest month — the one an off-grid system is sized for.
- Yearly energy
- Worst-month energy
| Tilt | kWh/kWp per year | Share of best year | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1298 | 79% | 0.95 | 6.6× |
| 15° | 1504 | 92% | 1.60 | 4.0× |
| 30° | 1620 | 99% | 2.14 | 2.9× |
| 40° year-round best | 1643 | 100% | 2.42 | 2.5× |
| 45° | 1638 | 100% | 2.54 | 2.3× |
| 47° = latitude | 1633 | 99% | 2.58 | 2.2× |
| 60° | 1559 | 95% | 2.77 | 1.8× |
| 70° | 1456 | 89% | 2.82 | 1.6× |
| 71° off-grid best | 1443 | 88% | 2.82 | 1.6× |
| 90° | 1143 | 70% | 2.68 | 1.5× |
A fixed array in Las Heras produces the most over a year at 40°. The design month for an off-grid system is June: at 71° it makes 2.82 kWh per kWp a day, 16% more than at 40°, and costs 12% of the yearly total. Why steep panels win winter.
Off-grid solar in Las Heras at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 40° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 40° | Mean temp. |
|---|---|---|---|---|---|
| January | 7.55 | 5.05 | 4.27 | 5.97 | 16.8 °C |
| February | 6.25 | 5.37 | 4.55 | 5.68 | 16.3 °C |
| March | 4.55 | 5.28 | 4.54 | 4.99 | 12.9 °C |
| April | 2.92 | 4.75 | 4.16 | 4.06 | 8.5 °C |
| May | 1.70 | 3.65 | 3.25 | 2.91 | 4.4 °C |
| June | 1.23 | 3.14 | 2.82 | 2.42 | 1.4 °C |
| July snow | 1.46 | 3.53 | 3.19 | 2.75 | 0.5 °C |
| August | 2.34 | 4.21 | 3.77 | 3.55 | 2.7 °C |
| September | 3.77 | 4.92 | 4.35 | 4.57 | 5.9 °C |
| October | 5.57 | 5.32 | 4.64 | 5.51 | 9.1 °C |
| November | 6.92 | 5.00 | 4.30 | 5.80 | 12.5 °C |
| December | 7.60 | 4.81 | 4.08 | 5.86 | 15.4 °C |
| Year | 4.31 avg | 4.58 avg | 1456 kWh | 1643 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 420 Wp of panels at 70°, versus 490 Wp at 40°. The steep array is 14% smaller for the same winter. Size your own system.
Row spacing in Las Heras
Distance between rows of 2 m long panels (slope length) so that no row shades the next between 10:00 and 14:00 solar time on the winter solstice.
6.9 mrow pitch at 70°
5.8 mrow pitch at 40°
How Las Heras compares in Argentina
Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.
306thof 314 places in Argentina for sunshine, shared: 4.31 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Argentina: 1,643 against 1,639 kWh per kWp.
+1 h 21 mindaylight on the longest day, compared with Buenos Aires: 15 h 50 min against 14 h 29 min.
40°best year-round tilt here; across Argentina it runs from 21° in Tartagal to 44° in Río Gallegos.
Of the 314 places in Argentina, Belén gets the most sun (6.11 peak sun hours a day) and Ushuaia the least (2.59); Las Heras ranks joint 306th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.82 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 8 h 34 min, −1 h 16 min compared with Buenos Aires.
Solar forecast for Las Heras, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
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Questions about the sun in Las Heras
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Places near Las Heras
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A free, live card for Las Heras: where the sun is right now on today's path, a countdown to sunset or sunrise, the daylight change, the moon phase at night and the best panel angle.
Sun positions: NREL Solar Position Algorithm. Climate: NASA POWER monthly climatology (NASA Langley Research Center). Forecast: Deutscher Wetterdienst, ICON-EU (CC BY 4.0), processed. Places: GeoNames (CC BY 4.0). Time zones: IANA. Sources and licences.