Solarposition.org

Gansu · China · 34.99° N · 106.21° E

Solar position in Zhangjiachuan

Sun position, daylight and the best solar panel angle for Zhangjiachuan — computed for 34.99° N, 106.21° E, 1671 m above sea level.

Sunrise today07:09104° ESE
Sunset today18:08256° WSW
Best panel angle32°year-round, facing south
Off-grid angle28°best for the darkest month

The sun right now

Azimuth180.0°
Elevation42.9°
At solar noon, 12:39Open on the sun map

Sun in Zhangjiachuan today

Sunday, 25 October 2026 · local time UTC+8

EventTimeDirection / height
Astronomical dawn05:44sun 18° below horizon
Nautical dawn06:1312° below
Civil dawn06:436° below
Sunrise07:09104° ESE
Golden hour ends07:44sun 6° up
Solar noon12:3942.9° high
Golden hour starts17:33sun 6° up
Sunset18:08256° WSW
Civil dusk18:346° below
Nautical dusk19:0412° below
Astronomical dusk19:3318° below
Day length10 h 59 min

Sun path diagram for Zhangjiachuan

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice67891011121314151617181920EquinoxDecember solstice91011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 78.5° at solar noon in Zhangjiachuan; on the December solstice only 31.6°. Sunrise swings from 60° ENE in June to 118° ESE in December — a 58° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January08:0013:0618:1210 h 12 min35.1°
February07:3413:0818:4311 h 08 min44.5°
March06:5813:0219:0712 h 09 min55.3°
April06:1612:5419:3213 h 16 min66.9°
May05:4712:5119:5614 h 08 min75.2°
June05:4112:5620:1214 h 31 min78.5°
July05:5613:0120:0614 h 10 min75.5°
August06:1912:5819:3613 h 17 min67.1°
September06:4212:4818:5412 h 12 min55.7°
October07:0512:3918:1311 h 07 min44.3°
November07:3512:4017:4610 h 12 min35.1°
December07:5812:5317:479 h 48 min31.6°

A year of daylight in Zhangjiachuan

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Zhangjiachuan

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

32°collects the most energy over a year: 1353 kWh per kWp.

28°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 32°Best worst-month 28°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearSeptember kWh/kWp/dayBest ÷ worst month
0°118888%2.812.2×
15°130596%3.031.6×
28° off-grid best1350100%3.081.4×
30°1352100%3.081.4×
32° year-round best1353100%3.081.4×
35° = latitude1352100%3.061.4×
45°132698%2.971.4×
60°123191%2.701.5×
70°113284%2.451.7×
90°87064%1.782.7×

A fixed array in Zhangjiachuan produces the most over a year at 32°. The design month for an off-grid system is September: at 28° it makes 3.08 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.

Off-grid solar in Zhangjiachuan at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 32° (year-round best).

012345January: 3.88 (70°)3.9JanFebruary: 3.62 (70°)3.6FebMarch: 3.57 (70°)3.6MarApril: 3.22 (70°)3.2AprMay: 2.72 (70°)2.7MayJune: 2.43 (70°)2.4JunJuly: 2.36 (70°)2.4JulAugust: 2.51 (70°)2.5AugSeptember: 2.45 (70°)2.4SepOctober: 2.89 (70°)2.9OctNovember: 3.48 (70°)3.5NovDecember: 4.12 (70°)4.1Dec32°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 32°Mean temp.
January snow2.554.223.883.42-4.4 °C
February snow3.143.993.623.63-1.1 °C
March4.174.023.574.194.2 °C
April5.063.723.224.4110.2 °C
May5.443.222.724.2615.0 °C
June5.452.942.434.0419.2 °C
July5.092.872.363.8121.1 °C
August4.543.042.513.6419.9 °C
September3.432.892.453.0814.8 °C
October3.013.322.893.169.1 °C
November2.643.893.483.342.6 °C
December snow2.444.504.123.51-3.2 °C
Year3.92 avg3.55 avg1132 kWh1353 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 500 Wp of panels at 70°, versus 380 Wp at 32°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Zhangjiachuan

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.

4.2 mrow pitch at 70°

3.7 mrow pitch at 32°

Row spacing calculator

How Zhangjiachuan compares in China

Against the other 2,094 places in China with climate data, for a fixed array at its best angle.

736thof 2,095 places in China for sunshine, shared: 3.92 peak sun hours a day on flat ground.

+7%solar energy a year compared with the average place in China: 1,353 against 1,262 kWh per kWp.

+20 mindaylight on the longest day, compared with Shanghai: 14 h 31 min against 14 h 11 min.

32°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); Zhangjiachuan ranks joint 736th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.36 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 9 h 48 min, −19 min compared with Shanghai.

The sunniest places in China

Solar forecast for Zhangjiachuan, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Zhangjiachuan

What is the best solar panel angle in Zhangjiachuan?
For a fixed array facing south, the best year-round tilt in Zhangjiachuan is 32°, worth about 1353 kWh per kWp a year. An off-grid system that has to get through September does better at about 28°.
What time is sunrise and sunset in Zhangjiachuan today?
On 25 October 2026 the sun rises at 07:09 and sets at 18:08 local time (UTC+8), giving 10 h 59 min of daylight. Solar noon is at 12:39.
How many peak sun hours does Zhangjiachuan get?
On a flat surface 3.9 hours a day averaged over the year, from 2.4 in December to 5.5 in June. Panels tilted at 70° receive 2.9 sun hours a day in July.
How high does the sun get in Zhangjiachuan?
At solar noon the sun stands 78.5° above the horizon on the June solstice and 31.6° on the December solstice.
Is Zhangjiachuan a good place for solar panels?
With 3.9 peak sun hours a day on flat ground, Zhangjiachuan ranks joint 736th of 2,095 places in China for sunshine. A 1 kWp array at the best angle (32°) makes about 1,353 kWh a year here, 7% more than the average place in China.

Places near Zhangjiachuan

All places in China

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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.