Gansu · China · 34.17° N · 105.54° E
Solar position in Kuanchuan
Sun position, daylight and the best solar panel angle for Kuanchuan — computed for 34.17° N, 105.54° E, 1698 m above sea level.
The sun right now
Sun in Kuanchuan today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:47 | sun 18° below horizon |
| Nautical dawn | 06:16 | 12° below |
| Civil dawn | 06:45 | 6° below |
| Sunrise | 07:11 | 104° ESE |
| Golden hour ends | 07:45 | sun 6° up |
| Solar noon | 12:41 | 43.8° high |
| Golden hour starts | 17:37 | sun 6° up |
| Sunset | 18:12 | 256° WSW |
| Civil dusk | 18:37 | 6° below |
| Nautical dusk | 19:07 | 12° below |
| Astronomical dusk | 19:36 | 18° below |
| Day length | 11 h 01 min | |
Sun path diagram for Kuanchuan
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 79.3° at solar noon in Kuanchuan; on the December solstice only 32.4°. Sunrise swings from 61° ENE in June to 118° 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 | 08:01 | 13:09 | 18:16 | 10 h 15 min | 36.0° |
| February | 07:36 | 13:11 | 18:46 | 11 h 10 min | 45.3° |
| March | 07:00 | 13:05 | 19:09 | 12 h 09 min | 56.1° |
| April | 06:19 | 12:56 | 19:33 | 13 h 14 min | 67.7° |
| May | 05:52 | 12:54 | 19:56 | 14 h 05 min | 76.0° |
| June | 05:46 | 12:59 | 20:12 | 14 h 26 min | 79.3° |
| July | 06:00 | 13:04 | 20:07 | 14 h 06 min | 76.3° |
| August | 06:23 | 13:00 | 19:38 | 13 h 15 min | 67.9° |
| September | 06:44 | 12:50 | 18:56 | 12 h 12 min | 56.5° |
| October | 07:07 | 12:42 | 18:16 | 11 h 09 min | 45.2° |
| November | 07:35 | 12:43 | 17:51 | 10 h 15 min | 35.9° |
| December | 07:59 | 12:55 | 17:51 | 9 h 52 min | 32.4° |
A year of daylight in Kuanchuan
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 Kuanchuan
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
31°collects the most energy over a year: 1277 kWh per kWp.
34°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 | October kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1138 | 89% | 2.28 | 2.2× |
| 15° | 1240 | 97% | 2.60 | 1.7× |
| 30° | 1277 | 100% | 2.78 | 1.5× |
| 31° year-round best | 1277 | 100% | 2.79 | 1.5× |
| 34° off-grid best = latitude | 1275 | 100% | 2.81 | 1.5× |
| 45° | 1245 | 98% | 2.81 | 1.5× |
| 60° | 1149 | 90% | 2.68 | 1.5× |
| 70° | 1053 | 82% | 2.51 | 1.7× |
| 90° | 802 | 63% | 2.00 | 2.5× |
A fixed array in Kuanchuan produces the most over a year at 31°. The design month for an off-grid system is October: at 34° it makes 2.81 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Kuanchuan at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 31° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 31° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.52 | 4.09 | 3.74 | 3.29 | -2.7 °C |
| February snow | 3.01 | 3.72 | 3.35 | 3.38 | 0.3 °C |
| March | 3.96 | 3.73 | 3.29 | 3.90 | 5.5 °C |
| April | 4.88 | 3.54 | 3.05 | 4.21 | 11.3 °C |
| May | 5.22 | 3.08 | 2.59 | 4.08 | 15.7 °C |
| June | 5.18 | 2.80 | 2.30 | 3.84 | 19.8 °C |
| July | 5.01 | 2.80 | 2.29 | 3.74 | 21.7 °C |
| August | 4.51 | 2.98 | 2.46 | 3.60 | 20.6 °C |
| September | 3.21 | 2.64 | 2.22 | 2.82 | 15.7 °C |
| October | 2.76 | 2.91 | 2.51 | 2.79 | 10.1 °C |
| November | 2.50 | 3.52 | 3.13 | 3.04 | 3.9 °C |
| December snow | 2.37 | 4.06 | 3.70 | 3.26 | -1.7 °C |
| Year | 3.76 avg | 3.32 avg | 1053 kWh | 1277 kWh |
Sizing example. To run a 1 kWh-per-day load through September on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 530 Wp of panels at 70°, versus 420 Wp at 31°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Kuanchuan
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°
3.6 mrow pitch at 31°
How Kuanchuan compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
1071stof 2,095 places in China for sunshine, shared: 3.76 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in China: 1,277 against 1,262 kWh per kWp.
+15 mindaylight on the longest day, compared with Shanghai: 14 h 26 min against 14 h 11 min.
31°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); Kuanchuan ranks joint 1071st. In its darkest month, September, 1 kWp of off-grid panels at 70° makes 2.22 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 9 h 52 min, −15 min compared with Shanghai.
Solar forecast for Kuanchuan, 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 Kuanchuan
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A free, live card for Kuanchuan: 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.