Hentiy · Mongolia · 47.32° N · 110.66° E
Solar position in Undurkhaan
Sun position, daylight and the best solar panel angle for Undurkhaan — computed for 47.32° N, 110.66° E, 1030 m above sea level.
The sun right now
Sun in Undurkhaan today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:27 | sun 18° below horizon |
| Nautical dawn | 06:02 | 12° below |
| Civil dawn | 06:38 | 6° below |
| Sunrise | 07:09 | 107° ESE |
| Golden hour ends | 07:53 | sun 6° up |
| Solar noon | 12:21 | 30.6° high |
| Golden hour starts | 16:49 | sun 6° up |
| Sunset | 17:32 | 253° WSW |
| Civil dusk | 18:03 | 6° below |
| Nautical dusk | 18:39 | 12° below |
| Astronomical dusk | 19:15 | 18° below |
| Day length | 10 h 23 min | |
Sun path diagram for Undurkhaan
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 66.1° at solar noon in Undurkhaan; on the December solstice only 19.3°. Sunrise swings from 53° NE in June to 125° SE in December — a 72° 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 | 08:15 | 12:48 | 17:22 | 9 h 06 min | 22.8° |
| February | 07:32 | 12:51 | 18:09 | 10 h 37 min | 32.1° |
| March | 06:39 | 12:44 | 18:50 | 12 h 12 min | 42.9° |
| April | 05:38 | 12:36 | 19:34 | 13 h 55 min | 54.5° |
| May | 04:54 | 12:34 | 20:14 | 15 h 19 min | 62.9° |
| June | 04:40 | 12:39 | 20:37 | 15 h 57 min | 66.1° |
| July | 05:02 | 12:43 | 20:24 | 15 h 23 min | 63.2° |
| August | 05:41 | 12:40 | 19:39 | 13 h 58 min | 54.8° |
| September | 06:22 | 12:30 | 18:38 | 12 h 16 min | 43.4° |
| October | 07:03 | 12:21 | 17:39 | 10 h 36 min | 32.0° |
| November | 07:49 | 12:22 | 16:56 | 9 h 06 min | 22.8° |
| December | 08:21 | 12:35 | 16:49 | 8 h 28 min | 19.3° |
A year of daylight in Undurkhaan
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 Undurkhaan
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
46°collects the most energy over a year: 1797 kWh per kWp.
61°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1327 | 74% | 1.26 | 4.4× |
| 15° | 1577 | 88% | 2.17 | 2.7× |
| 30° | 1737 | 97% | 2.96 | 2.0× |
| 45° | 1797 | 100% | 3.57 | 1.7× |
| 46° year-round best | 1797 | 100% | 3.60 | 1.7× |
| 47° = latitude | 1797 | 100% | 3.63 | 1.7× |
| 60° | 1755 | 98% | 3.96 | 1.6× |
| 61° off-grid best | 1748 | 97% | 3.98 | 1.6× |
| 70° | 1671 | 93% | 4.09 | 1.8× |
| 90° | 1387 | 77% | 4.01 | 2.4× |
A fixed array in Undurkhaan produces the most over a year at 46°. The design month for an off-grid system is December: at 61° it makes 3.98 kWh per kWp a day, 10% more than at 46°, and costs 3% of the yearly total. Why steep panels win winter.
Off-grid solar in Undurkhaan at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 46° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 46° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.96 | 4.93 | 4.77 | 4.25 | -18.7 °C |
| February snow | 3.12 | 6.16 | 5.88 | 5.51 | -15.2 °C |
| March snow | 4.56 | 6.70 | 6.17 | 6.17 | -5.8 °C |
| April | 5.78 | 5.41 | 4.82 | 5.70 | 3.2 °C |
| May | 6.65 | 4.82 | 4.17 | 5.40 | 10.7 °C |
| June | 6.56 | 4.27 | 3.58 | 4.82 | 17.8 °C |
| July | 6.23 | 4.23 | 3.51 | 4.66 | 20.5 °C |
| August | 5.67 | 4.70 | 3.96 | 4.88 | 18.0 °C |
| September | 4.65 | 5.34 | 4.63 | 5.12 | 10.7 °C |
| October | 3.29 | 5.37 | 4.84 | 4.85 | 1.1 °C |
| November snow | 2.05 | 4.97 | 4.65 | 4.20 | -9.0 °C |
| December snow | 1.52 | 4.25 | 4.09 | 3.60 | -17.0 °C |
| Year | 4.34 avg | 5.09 avg | 1671 kWh | 1797 kWh |
Sizing example. To run a 1 kWh-per-day load through July on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 340 Wp of panels at 70°, versus 330 Wp at 46°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Undurkhaan
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.
7.2 mrow pitch at 70°
6.4 mrow pitch at 46°
How Undurkhaan compares in Mongolia
Against the other 23 places in Mongolia with climate data, for a fixed array at its best angle.
9thof 24 places in Mongolia for sunshine: 4.34 peak sun hours a day on flat ground.
+2%solar energy a year compared with the average place in Mongolia: 1,797 against 1,757 kWh per kWp.
−5 mindaylight on the longest day, compared with Ulan Bator: 15 h 57 min against 16 h 02 min.
46°best year-round tilt here; across Mongolia it runs from 43° in Ulaangom to 48° in Mörön.
Of the 24 places in Mongolia, Bogd gets the most sun (4.71 peak sun hours a day) and Sühbaatar the least (3.82); Undurkhaan ranks 9th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 3.52 kWh a day here, against 3.47 kWh on average in Mongolia. The shortest day lasts 8 h 28 min, +5 min compared with Ulan Bator.
Solar forecast for Undurkhaan, 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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A free, live card for Undurkhaan: 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.