Yunnan · China · 25.04° N · 100.51° E
Solar position in Nanjian
Sun position, daylight and the best solar panel angle for Nanjian — computed for 25.04° N, 100.51° E, 1401 m above sea level.
The sun right now
Sun in Nanjian today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 06:04 | sun 18° below horizon |
| Nautical dawn | 06:31 | 12° below |
| Civil dawn | 06:57 | 6° below |
| Sunrise | 07:21 | 103° ESE |
| Golden hour ends | 07:52 | sun 6° up |
| Solar noon | 13:01 | 52.9° high |
| Golden hour starts | 18:11 | sun 6° up |
| Sunset | 18:42 | 257° WSW |
| Civil dusk | 19:05 | 6° below |
| Nautical dusk | 19:32 | 12° below |
| Astronomical dusk | 19:59 | 18° below |
| Day length | 11 h 21 min | |
Sun path diagram for Nanjian
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 88.4° at solar noon in Nanjian; on the December solstice only 41.5°. Sunrise swings from 64° ENE in June to 116° ESE in December — a 52° 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 | 08:04 | 13:29 | 18:54 | 10 h 50 min | 45.1° |
| February | 07:47 | 13:31 | 19:15 | 11 h 27 min | 54.4° |
| March | 07:21 | 13:25 | 19:29 | 12 h 08 min | 65.2° |
| April | 06:50 | 13:16 | 19:43 | 12 h 53 min | 76.8° |
| May | 06:31 | 13:14 | 19:58 | 13 h 27 min | 85.1° |
| June | 06:28 | 13:19 | 20:10 | 13 h 42 min | 88.4° |
| July | 06:40 | 13:24 | 20:08 | 13 h 28 min | 85.4° |
| August | 06:54 | 13:21 | 19:47 | 12 h 53 min | 77.1° |
| September | 07:06 | 13:11 | 19:15 | 12 h 10 min | 65.7° |
| October | 07:19 | 13:02 | 18:45 | 11 h 27 min | 54.3° |
| November | 07:38 | 13:03 | 18:28 | 10 h 50 min | 45.1° |
| December | 07:58 | 13:15 | 18:33 | 10 h 35 min | 41.5° |
A year of daylight in Nanjian
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 Nanjian
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
28°collects the most energy over a year: 1526 kWh per kWp.
8°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 | July kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1375 | 90% | 3.40 | 1.4× |
| 8° off-grid best | 1447 | 95% | 3.38 | 1.4× |
| 15° | 1492 | 98% | 3.33 | 1.5× |
| 25° = latitude | 1524 | 100% | 3.19 | 1.7× |
| 28° year-round best | 1526 | 100% | 3.14 | 1.7× |
| 30° | 1525 | 100% | 3.10 | 1.7× |
| 45° | 1475 | 97% | 2.74 | 2.0× |
| 60° | 1344 | 88% | 2.27 | 2.4× |
| 70° | 1217 | 80% | 1.92 | 2.7× |
| 90° | 897 | 59% | 1.26 | 3.5× |
A fixed array in Nanjian produces the most over a year at 28°. The design month for an off-grid system is July: at 8° it makes 3.38 kWh per kWp a day, 8% more than at 28°, and costs 5% of the yearly total. Why steep panels win winter.
Off-grid solar in Nanjian at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 28° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 28° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.25 | 5.98 | 5.24 | 5.08 | 8.0 °C |
| February | 5.04 | 5.62 | 4.89 | 5.34 | 10.4 °C |
| March | 5.41 | 4.47 | 3.83 | 4.96 | 13.8 °C |
| April | 5.52 | 3.39 | 2.85 | 4.47 | 17.0 °C |
| May | 5.38 | 2.71 | 2.24 | 4.02 | 19.3 °C |
| June | 4.82 | 2.47 | 2.02 | 3.52 | 20.7 °C |
| July | 4.23 | 2.34 | 1.92 | 3.14 | 20.3 °C |
| August | 4.43 | 2.68 | 2.21 | 3.42 | 20.1 °C |
| September | 4.14 | 2.99 | 2.49 | 3.43 | 18.7 °C |
| October | 3.91 | 3.59 | 3.05 | 3.65 | 15.9 °C |
| November | 4.13 | 5.22 | 4.51 | 4.60 | 12.0 °C |
| December | 3.83 | 5.55 | 4.86 | 4.62 | 8.8 °C |
| Year | 4.59 avg | 3.91 avg | 1217 kWh | 1526 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 620 Wp of panels at 70°, versus 380 Wp at 28°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Nanjian
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.
3.1 mrow pitch at 70°
3.0 mrow pitch at 28°
How Nanjian compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
197thof 2,095 places in China for sunshine, shared: 4.59 peak sun hours a day on flat ground.
+21%solar energy a year compared with the average place in China: 1,526 against 1,262 kWh per kWp.
−29 mindaylight on the longest day, compared with Shanghai: 13 h 42 min against 14 h 11 min.
28°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); Nanjian ranks joint 197th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 1.92 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 10 h 35 min, +28 min compared with Shanghai.
Solar forecast for Nanjian, 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 Nanjian
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Places near Nanjian
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A free, live card for Nanjian: 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.