Qinghai · China · 38.39° N · 90.16° E
Solar position in Mangnai Zhen
Sun position, daylight and the best solar panel angle for Mangnai Zhen — computed for 38.39° N, 90.16° E, 3000 m above sea level.
The sun right now
Sun in Mangnai Zhen today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:49 | sun 18° below horizon |
| Nautical dawn | 07:19 | 12° below |
| Civil dawn | 07:50 | 6° below |
| Sunrise | 08:18 | 105° ESE |
| Golden hour ends | 08:54 | sun 6° up |
| Solar noon | 13:43 | 39.5° high |
| Golden hour starts | 18:31 | sun 6° up |
| Sunset | 19:08 | 255° WSW |
| Civil dusk | 19:35 | 6° below |
| Nautical dusk | 20:06 | 12° below |
| Astronomical dusk | 20:37 | 18° below |
| Day length | 10 h 50 min | |
Sun path diagram for Mangnai Zhen
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 75.1° at solar noon in Mangnai Zhen; on the December solstice only 28.2°. Sunrise swings from 59° ENE in June to 120° ESE in December — a 61° 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 | 09:12 | 14:10 | 19:08 | 9 h 56 min | 31.7° |
| February | 08:42 | 14:13 | 19:43 | 11 h 01 min | 41.1° |
| March | 08:01 | 14:06 | 20:11 | 12 h 10 min | 51.9° |
| April | 07:15 | 13:58 | 20:41 | 13 h 25 min | 63.5° |
| May | 06:43 | 13:56 | 21:08 | 14 h 25 min | 71.8° |
| June | 06:35 | 14:01 | 21:26 | 14 h 51 min | 75.1° |
| July | 06:52 | 14:05 | 21:19 | 14 h 27 min | 72.1° |
| August | 07:18 | 14:02 | 20:45 | 13 h 27 min | 63.7° |
| September | 07:45 | 13:52 | 19:58 | 12 h 13 min | 52.3° |
| October | 08:13 | 13:43 | 19:13 | 11 h 00 min | 40.9° |
| November | 08:46 | 13:45 | 18:43 | 9 h 56 min | 31.7° |
| December | 09:12 | 13:57 | 18:41 | 9 h 29 min | 28.2° |
A year of daylight in Mangnai Zhen
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 Mangnai Zhen
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
38°collects the most energy over a year: 1895 kWh per kWp.
46°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° | 1581 | 83% | 2.20 | 2.7× |
| 15° | 1780 | 94% | 3.16 | 1.9× |
| 30° | 1882 | 99% | 3.96 | 1.5× |
| 38° year-round best = latitude | 1895 | 100% | 4.30 | 1.3× |
| 45° | 1882 | 99% | 4.53 | 1.3× |
| 46° off-grid best | 1878 | 99% | 4.56 | 1.3× |
| 60° | 1782 | 94% | 4.86 | 1.5× |
| 70° | 1664 | 88% | 4.92 | 1.7× |
| 90° | 1324 | 70% | 4.69 | 2.7× |
A fixed array in Mangnai Zhen produces the most over a year at 38°. The design month for an off-grid system is December: at 46° it makes 4.56 kWh per kWp a day, 6% more than at 38°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Mangnai Zhen at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 38° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 38° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.77 | 5.19 | 4.90 | 4.37 | -11.7 °C |
| February snow | 3.73 | 5.59 | 5.22 | 4.98 | -8.6 °C |
| March snow | 5.10 | 6.07 | 5.55 | 5.76 | -3.4 °C |
| April | 6.31 | 4.91 | 4.40 | 5.75 | 2.2 °C |
| May | 7.00 | 4.30 | 3.78 | 5.57 | 6.2 °C |
| June | 6.90 | 3.81 | 3.28 | 5.11 | 10.6 °C |
| July | 6.60 | 3.79 | 3.23 | 4.94 | 13.1 °C |
| August | 6.32 | 4.39 | 3.77 | 5.23 | 12.5 °C |
| September | 5.60 | 5.27 | 4.63 | 5.55 | 7.5 °C |
| October | 4.57 | 6.07 | 5.46 | 5.69 | 1.0 °C |
| November snow | 3.25 | 6.09 | 5.60 | 5.04 | -5.2 °C |
| December snow | 2.56 | 5.24 | 4.92 | 4.30 | -10.2 °C |
| Year | 5.06 avg | 5.06 avg | 1664 kWh | 1895 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 360 Wp of panels at 70°, versus 270 Wp at 38°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Mangnai Zhen
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.
4.7 mrow pitch at 70°
4.2 mrow pitch at 38°
How Mangnai Zhen compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
29thof 2,095 places in China for sunshine, shared: 5.06 peak sun hours a day on flat ground.
+50%solar energy a year compared with the average place in China: 1,894 against 1,262 kWh per kWp.
+40 mindaylight on the longest day, compared with Shanghai: 14 h 51 min against 14 h 11 min.
38°best year-round tilt here; across China it runs from 14° in Haikou to 52° in Xilinji.
Of the 2,095 places in China, Nyêmo gets the most sun (5.75 peak sun hours a day) and Baima and 11 other places the least (2.91); Mangnai Zhen ranks joint 29th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 3.24 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 9 h 29 min, −38 min compared with Shanghai.
Solar forecast for Mangnai Zhen, 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 Mangnai Zhen: 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.