Santiago Metropolitan · Chile · 33.73° S · 70.74° W
Solar position in Buin
Sun position, daylight and the best solar panel angle for Buin — computed for 33.73° S, 70.74° W, 483 m above sea level.
The sun right now
Sun in Buin today
Saturday, 24 October 2026 · local time UTC−3
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:22 | sun 18° below horizon |
| Nautical dawn | 05:54 | 12° below |
| Civil dawn | 06:24 | 6° below |
| Sunrise | 06:50 | 105° ESE |
| Golden hour ends | 07:24 | sun 6° up |
| Solar noon | 13:27 | 68.2° high |
| Golden hour starts | 19:30 | sun 6° up |
| Sunset | 20:03 | 255° WSW |
| Civil dusk | 20:29 | 6° below |
| Nautical dusk | 21:00 | 12° below |
| Astronomical dusk | 21:33 | 18° below |
| Day length | 13 h 13 min | |
Sun path diagram for Buin
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 32.9° at solar noon in Buin; on the December solstice only 79.7°. Sunrise swings from 62° ENE in June to 119° ESE in December — a 57° 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 | 06:54 | 13:54 | 20:54 | 14 h 00 min | 76.1° |
| February | 07:24 | 13:56 | 20:28 | 13 h 04 min | 66.7° |
| March | 07:47 | 13:49 | 19:52 | 12 h 06 min | 55.8° |
| April | 07:10 | 12:41 | 18:12 | 11 h 03 min | 44.3° |
| May | 07:32 | 12:39 | 17:46 | 10 h 14 min | 36.0° |
| June | 07:47 | 12:44 | 17:42 | 9 h 55 min | 32.9° |
| July | 07:42 | 12:49 | 17:56 | 10 h 14 min | 35.9° |
| August | 07:14 | 12:46 | 18:17 | 11 h 03 min | 44.3° |
| September | 07:33 | 13:36 | 19:38 | 12 h 05 min | 55.8° |
| October | 06:54 | 13:27 | 20:01 | 13 h 07 min | 67.1° |
| November | 06:28 | 13:28 | 20:29 | 14 h 02 min | 76.3° |
| December | 06:29 | 13:41 | 20:53 | 14 h 24 min | 79.7° |
A year of daylight in Buin
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 Buin
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
27°collects the most energy over a year: 1753 kWh per kWp.
58°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° | 1590 | 91% | 1.73 | 4.0× |
| 15° | 1721 | 98% | 2.28 | 3.0× |
| 27° year-round best | 1753 | 100% | 2.63 | 2.5× |
| 30° | 1751 | 100% | 2.70 | 2.4× |
| 34° = latitude | 1741 | 99% | 2.78 | 2.2× |
| 45° | 1677 | 96% | 2.94 | 2.0× |
| 58° off-grid best | 1534 | 87% | 3.01 | 1.8× |
| 60° | 1506 | 86% | 3.01 | 1.8× |
| 70° | 1343 | 77% | 2.95 | 1.6× |
| 90° | 937 | 53% | 2.59 | 2.6× |
A fixed array in Buin produces the most over a year at 27°. The design month for an off-grid system is June: at 58° it makes 3.01 kWh per kWp a day, 15% more than at 27°, and costs 13% of the yearly total. Why steep panels win winter.
Off-grid solar in Buin at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 27° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 27° | Mean temp. |
|---|---|---|---|---|---|
| January | 8.58 | 4.07 | 3.39 | 6.45 | 20.4 °C |
| February | 7.70 | 4.97 | 4.16 | 6.40 | 19.7 °C |
| March | 6.27 | 5.72 | 4.81 | 5.93 | 18.2 °C |
| April | 4.34 | 5.40 | 4.62 | 4.73 | 14.8 °C |
| May | 2.79 | 4.05 | 3.50 | 3.27 | 11.5 °C |
| June | 2.13 | 3.37 | 2.95 | 2.63 | 8.5 °C |
| July | 2.36 | 3.56 | 3.12 | 2.84 | 7.7 °C |
| August | 3.13 | 3.95 | 3.45 | 3.46 | 8.9 °C |
| September | 4.46 | 4.40 | 3.82 | 4.43 | 10.8 °C |
| October | 5.91 | 4.39 | 3.76 | 5.24 | 13.2 °C |
| November | 7.60 | 4.09 | 3.45 | 6.03 | 16.3 °C |
| December | 8.57 | 3.79 | 3.17 | 6.35 | 18.8 °C |
| Year | 5.31 avg | 4.31 avg | 1343 kWh | 1753 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 400 Wp of panels at 70°, versus 450 Wp at 27°. The steep array is 11% smaller for the same winter. Size your own system.
Row spacing in Buin
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.
4.0 mrow pitch at 70°
3.4 mrow pitch at 27°
How Buin compares in Chile
Against the other 138 places in Chile with climate data, for a fixed array at its best angle.
31stof 139 places in Chile for sunshine, shared: 5.31 peak sun hours a day on flat ground.
+5%solar energy a year compared with the average place in Chile: 1,753 against 1,668 kWh per kWp.
+1 mindaylight on the longest day, compared with Santiago: 14 h 24 min against 14 h 23 min.
27°best year-round tilt here; across Chile it runs from 16° in Arica to 43° in Punta Arenas.
Of the 139 places in Chile, Calama gets the most sun (7.19 peak sun hours a day) and Puerto Natales the least (2.73); Buin ranks joint 31st. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 2.95 kWh a day here, against 2.61 kWh on average in Chile. The shortest day lasts 9 h 55 min, −1 min compared with Santiago.
Solar forecast for Buin, 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 Buin
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Places near Buin
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A free, live card for Buin: 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.