Solarposition.org

Chongqing · China · 29.74° N · 105.98° E

Solar position in Yongxi

Sun position, daylight and the best solar panel angle for Yongxi — computed for 29.74° N, 105.98° E, 274 m above sea level.

Sunrise today07:04103° ESE
Sunset today18:15256° WSW
Best panel angle19°year-round, facing south
Off-grid angle45°best for the darkest month

The sun right now

Azimuth180.0°
Elevation48.2°
At solar noon, 12:40Open on the sun map

Sun in Yongxi today

Sunday, 25 October 2026 · local time UTC+8

EventTimeDirection / height
Astronomical dawn05:44sun 18° below horizon
Nautical dawn06:1112° below
Civil dawn06:396° below
Sunrise07:04103° ESE
Golden hour ends07:36sun 6° up
Solar noon12:4048.2° high
Golden hour starts17:43sun 6° up
Sunset18:15256° WSW
Civil dusk18:406° below
Nautical dusk19:0812° below
Astronomical dusk19:3518° below
Day length11 h 12 min

Sun path diagram for Yongxi

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 solstice78910111213141516171819EquinoxDecember solstice891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 83.7° at solar noon in Yongxi; on the December solstice only 36.8°. Sunrise swings from 62° ENE in June to 117° ESE in December — a 55° 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
January07:5013:0718:2310 h 33 min40.4°
February07:3013:0918:4911 h 19 min49.7°
March06:5913:0319:0712 h 09 min60.5°
April06:2312:5419:2613 h 03 min72.1°
May06:0012:5219:4513 h 45 min80.4°
June05:5612:5719:5914 h 03 min83.7°
July06:0813:0219:5513 h 47 min80.7°
August06:2712:5919:3113 h 04 min72.4°
September06:4312:4918:5412 h 11 min61.0°
October07:0112:4018:1911 h 18 min49.6°
November07:2512:4117:5810 h 33 min40.4°
December07:4612:5318:0110 h 14 min36.8°

A year of daylight in Yongxi

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 Yongxi

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

19°collects the most energy over a year: 926 kWh per kWp.

45°gives the most in the darkest month — the one an off-grid system is sized for.

50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 19°Best worst-month 45°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°88996%1.133.4×
15°924100%1.302.9×
19° year-round best926100%1.342.8×
30° = latitude91399%1.412.5×
45° off-grid best85592%1.452.2×
60°75782%1.421.9×
70°67173%1.351.7×
90°47451%1.131.5×

A fixed array in Yongxi produces the most over a year at 19°. The design month for an off-grid system is December: at 45° it makes 1.45 kWh per kWp a day, 8% more than at 19°, and costs 8% of the yearly total. Why steep panels win winter.

Off-grid solar in Yongxi at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 19° (year-round best).

012345January: 1.48 (70°)1.5JanFebruary: 1.74 (70°)1.7FebMarch: 2.13 (70°)2.1MarApril: 2.17 (70°)2.2AprMay: 1.88 (70°)1.9MayJune: 1.68 (70°)1.7JunJuly: 2.09 (70°)2.1JulAugust: 2.35 (70°)2.3AugSeptember: 2.03 (70°)2.0SepOctober: 1.60 (70°)1.6OctNovember: 1.57 (70°)1.6NovDecember: 1.35 (70°)1.4Dec19°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 19°Mean temp.
January1.581.721.481.516.0 °C
February2.122.031.741.958.9 °C
March3.002.512.132.6513.9 °C
April3.812.622.173.1618.9 °C
May3.992.321.883.1422.5 °C
June3.902.101.682.9825.3 °C
July4.922.632.093.7628.0 °C
August4.692.932.353.7127.6 °C
September3.222.492.032.6923.5 °C
October2.121.941.601.8618.3 °C
November1.731.861.571.6212.9 °C
December1.391.581.351.347.3 °C
Year3.05 avg2.23 avg671 kWh926 kWh

Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 870 Wp of panels at 70°, versus 880 Wp at 19°. The steep array is 1% smaller for the same winter. Size your own system.

Row spacing in Yongxi

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.

3.5 mrow pitch at 70°

2.9 mrow pitch at 19°

Row spacing calculator

How Yongxi compares in China

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

1806thof 2,095 places in China for sunshine, shared: 3.05 peak sun hours a day on flat ground.

−27%solar energy a year compared with the average place in China: 926 against 1,262 kWh per kWp.

−7 mindaylight on the longest day, compared with Shanghai: 14 h 03 min against 14 h 11 min.

19°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); Yongxi ranks joint 1806th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.35 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 10 h 14 min, +7 min compared with Shanghai.

The sunniest places in China

Solar forecast for Yongxi, 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 Yongxi

What is the best solar panel angle in Yongxi?
For a fixed array facing south, the best year-round tilt in Yongxi is 19°, worth about 926 kWh per kWp a year. An off-grid system that has to get through December does better at about 45°.
What time is sunrise and sunset in Yongxi today?
On 25 October 2026 the sun rises at 07:04 and sets at 18:15 local time (UTC+8), giving 11 h 12 min of daylight. Solar noon is at 12:40.
How many peak sun hours does Yongxi get?
On a flat surface 3.0 hours a day averaged over the year, from 1.4 in December to 4.9 in July. Panels tilted at 70° receive 1.6 sun hours a day in December.
How high does the sun get in Yongxi?
At solar noon the sun stands 83.7° above the horizon on the June solstice and 36.8° on the December solstice.
Is Yongxi a good place for solar panels?
With 3.0 peak sun hours a day on flat ground, Yongxi ranks joint 1806th of 2,095 places in China for sunshine. A 1 kWp array at the best angle (19°) makes about 926 kWh a year here, 27% less than the average place in China.

Places near Yongxi

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.