East Aimak · Mongolia · 48.07° N · 114.53° E
Solar position in Choibalsan
Sun position, daylight and the best solar panel angle for Choibalsan — computed for 48.07° N, 114.53° E, 741 m above sea level.
The sun right now
Sun in Choibalsan today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:11 | sun 18° below horizon |
| Nautical dawn | 05:47 | 12° below |
| Civil dawn | 06:23 | 6° below |
| Sunrise | 06:55 | 107° ESE |
| Golden hour ends | 07:39 | sun 6° up |
| Solar noon | 12:05 | 29.9° high |
| Golden hour starts | 16:31 | sun 6° up |
| Sunset | 17:15 | 253° WSW |
| Civil dusk | 17:47 | 6° below |
| Nautical dusk | 18:23 | 12° below |
| Astronomical dusk | 18:59 | 18° below |
| Day length | 10 h 20 min | |
Sun path diagram for Choibalsan
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 65.4° at solar noon in Choibalsan; on the December solstice only 18.5°. Sunrise swings from 52° NE in June to 125° SE in December — a 73° 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 | 08:02 | 12:33 | 17:03 | 9 h 01 min | 22.1° |
| February | 07:18 | 12:35 | 17:53 | 10 h 34 min | 31.4° |
| March | 06:23 | 12:29 | 18:35 | 12 h 12 min | 42.2° |
| April | 05:21 | 12:20 | 19:20 | 13 h 58 min | 53.8° |
| May | 04:36 | 12:18 | 20:01 | 15 h 25 min | 62.1° |
| June | 04:21 | 12:23 | 20:25 | 16 h 04 min | 65.4° |
| July | 04:43 | 12:28 | 20:12 | 15 h 28 min | 62.4° |
| August | 05:24 | 12:24 | 19:25 | 14 h 01 min | 54.1° |
| September | 06:06 | 12:14 | 18:22 | 12 h 16 min | 42.7° |
| October | 06:49 | 12:06 | 17:22 | 10 h 33 min | 31.3° |
| November | 07:36 | 12:07 | 16:38 | 9 h 01 min | 22.1° |
| December | 08:08 | 12:19 | 16:30 | 8 h 22 min | 18.5° |
A year of daylight in Choibalsan
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 Choibalsan
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
47°collects the most energy over a year: 1758 kWh per kWp.
64°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° | 1286 | 73% | 1.15 | 4.7× |
| 15° | 1534 | 87% | 2.03 | 2.8× |
| 30° | 1694 | 96% | 2.79 | 2.0× |
| 45° | 1757 | 100% | 3.38 | 1.8× |
| 47° year-round best | 1758 | 100% | 3.45 | 1.8× |
| 48° = latitude | 1757 | 100% | 3.48 | 1.8× |
| 60° | 1720 | 98% | 3.77 | 1.7× |
| 64° off-grid best | 1693 | 96% | 3.83 | 1.6× |
| 70° | 1641 | 93% | 3.90 | 1.8× |
| 90° | 1367 | 78% | 3.84 | 2.4× |
A fixed array in Choibalsan produces the most over a year at 47°. The design month for an off-grid system is December: at 64° it makes 3.83 kWh per kWp a day, 11% more than at 47°, and costs 4% of the yearly total. Why steep panels win winter.
Off-grid solar in Choibalsan at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 47° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 47° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.88 | 4.73 | 4.58 | 4.10 | -19.3 °C |
| February snow | 3.13 | 6.16 | 5.88 | 5.52 | -15.5 °C |
| March snow | 4.53 | 6.72 | 6.19 | 6.19 | -5.8 °C |
| April | 5.61 | 5.33 | 4.74 | 5.55 | 3.9 °C |
| May | 6.42 | 4.74 | 4.08 | 5.20 | 11.9 °C |
| June | 6.54 | 4.31 | 3.59 | 4.78 | 19.2 °C |
| July | 6.14 | 4.24 | 3.50 | 4.57 | 21.9 °C |
| August | 5.56 | 4.69 | 3.92 | 4.78 | 19.4 °C |
| September | 4.55 | 5.31 | 4.58 | 5.04 | 11.9 °C |
| October | 3.13 | 5.20 | 4.67 | 4.68 | 1.8 °C |
| November snow | 1.93 | 4.74 | 4.42 | 4.01 | -8.5 °C |
| December snow | 1.40 | 4.05 | 3.90 | 3.45 | -17.1 °C |
| Year | 4.24 avg | 5.01 avg | 1641 kWh | 1758 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 340 Wp at 47°. The steep array is 2% smaller for the same winter. Size your own system.
Row spacing in Choibalsan
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.
7.5 mrow pitch at 70°
6.7 mrow pitch at 47°
How Choibalsan compares in Mongolia
Against the other 23 places in Mongolia with climate data, for a fixed array at its best angle.
13thof 24 places in Mongolia for sunshine, shared: 4.24 peak sun hours a day on flat ground.
±0%solar energy a year compared with the average place in Mongolia: 1,758 against 1,757 kWh per kWp.
+2 mindaylight on the longest day, compared with Ulan Bator: 16 h 04 min against 16 h 02 min.
47°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); Choibalsan ranks joint 13th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 3.50 kWh a day here, against 3.47 kWh on average in Mongolia. The shortest day lasts 8 h 22 min, −1 min compared with Ulan Bator.
Solar forecast for Choibalsan, 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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Places near Choibalsan
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A free, live card for Choibalsan: 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.