Solarposition.org

Rio Negro · Argentina · 39.03° S · 67.58° W

Solar position in General Roca

Sun position, daylight and the best solar panel angle for General Roca — computed for 39.03° S, 67.58° W, 237 m above sea level.

Sunrise today06:31106° ESE
Sunset today19:58254° WSW
Best panel angle33°year-round, facing north
Off-grid angle64°best for the darkest month

The sun right now

Azimuth180.0°
Elevation62.9°
At solar noon, 13:14Open on the sun map

Sun in General Roca today

Saturday, 24 October 2026 · local time UTC−3

EventTimeDirection / height
Astronomical dawn04:53sun 18° below horizon
Nautical dawn05:2912° below
Civil dawn06:036° below
Sunrise06:31106° ESE
Golden hour ends07:07sun 6° up
Solar noon13:1462.9° high
Golden hour starts19:22sun 6° up
Sunset19:58254° WSW
Civil dusk20:266° below
Nautical dusk21:0012° below
Astronomical dusk21:3618° below
Day length13 h 28 min

Sun path diagram for General Roca

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice9101112131415161718EquinoxDecember solstice7891011121314151617181920Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 27.6° at solar noon in General Roca; on the December solstice only 74.4°. Sunrise swings from 60° ENE in June to 122° ESE in December — a 62° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:2813:4120:5414 h 25 min70.8°
February07:0413:4320:2213 h 17 min61.4°
March07:3413:3719:3912 h 06 min50.6°
April08:0413:2818:5310 h 49 min39.0°
May08:3113:2618:219 h 50 min30.7°
June08:4913:3218:149 h 25 min27.6°
July08:4213:3618:319 h 49 min30.6°
August08:0813:3318:5810 h 50 min39.0°
September07:2113:2319:2612 h 05 min50.5°
October06:3513:1519:5513 h 20 min61.8°
November06:0213:1620:3014 h 27 min71.0°
December06:0113:2820:5514 h 55 min74.4°

A year of daylight in General Roca

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in General Roca

Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

33°collects the most energy over a year: 1764 kWh per kWp.

64°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 33°Best worst-month 64°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJune kWh/kWp/dayBest ÷ worst month
0°150785%1.534.5×
15°168696%2.203.1×
30°1762100%2.742.3×
33° year-round best1764100%2.822.2×
39° = latitude1757100%2.972.0×
45°173298%3.091.8×
60°160091%3.251.6×
64° off-grid best154888%3.261.5×
70°145983%3.241.5×
90°107561%2.952.1×

A fixed array in General Roca produces the most over a year at 33°. The design month for an off-grid system is June: at 64° it makes 3.26 kWh per kWp a day, 15% more than at 33°, and costs 12% of the yearly total. Why steep panels win winter.

Off-grid solar in General Roca at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 33° (year-round best).

02468January: 3.77 (70°)3.8JanFebruary: 4.33 (70°)4.3FebMarch: 4.75 (70°)4.7MarApril: 4.54 (70°)4.5AprMay: 3.55 (70°)3.6MayJune: 3.24 (70°)3.2JunJuly: 3.58 (70°)3.6JulAugust: 4.03 (70°)4.0AugSeptember: 4.48 (70°)4.5SepOctober: 4.25 (70°)4.2OctNovember: 3.90 (70°)3.9NovDecember: 3.59 (70°)3.6Dec33°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 33°Mean temp.
January8.374.603.776.2224.3 °C
February7.165.254.336.0423.0 °C
March5.575.674.755.5319.5 °C
April3.795.304.544.5314.1 °C
May2.374.073.553.249.3 °C
June1.913.673.242.826.0 °C
July2.184.033.583.175.2 °C
August3.094.584.033.907.3 °C
September4.565.174.484.9210.7 °C
October6.024.974.255.5114.5 °C
November7.644.653.906.0418.9 °C
December8.484.353.596.1722.3 °C
Year5.09 avg4.69 avg1459 kWh1764 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 360 Wp of panels at 70°, versus 420 Wp at 33°. The steep array is 13% smaller for the same winter. Size your own system.

Row spacing in General Roca

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.

4.8 mrow pitch at 70°

4.1 mrow pitch at 33°

Row spacing calculator

How General Roca compares in Argentina

Against the other 313 places in Argentina with climate data, for a fixed array at its best angle.

54thof 314 places in Argentina for sunshine: 5.09 peak sun hours a day on flat ground.

+8%solar energy a year compared with the average place in Argentina: 1,764 against 1,639 kWh per kWp.

+26 mindaylight on the longest day, compared with Buenos Aires: 14 h 55 min against 14 h 29 min.

33°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); General Roca ranks 54th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 3.24 kWh a day here, against 2.68 kWh on average in Argentina. The shortest day lasts 9 h 25 min, −25 min compared with Buenos Aires.

The sunniest places in Argentina

Solar forecast for General Roca, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in General Roca

What is the best solar panel angle in General Roca?
For a fixed array facing north, the best year-round tilt in General Roca is 33°, worth about 1764 kWh per kWp a year. An off-grid system that has to get through June does better at about 64°.
What time is sunrise and sunset in General Roca today?
On 24 October 2026 the sun rises at 06:31 and sets at 19:58 local time (UTC−3), giving 13 h 28 min of daylight. Solar noon is at 13:14.
How many peak sun hours does General Roca get?
On a flat surface 5.1 hours a day averaged over the year, from 1.9 in June to 8.5 in December. Panels tilted at 70° receive 3.7 sun hours a day in June.
How high does the sun get in General Roca?
At solar noon the sun stands 27.6° above the horizon on the June solstice and 74.4° on the December solstice.
Is General Roca a good place for solar panels?
With 5.1 peak sun hours a day on flat ground, General Roca ranks 54th of 314 places in Argentina for sunshine. A 1 kWp array at the best angle (33°) makes about 1,764 kWh a year here, 8% more than the average place in Argentina.

Places near General Roca

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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.