Solarposition.org

Chongqing · China · 30.64° N · 107.85° E

Solar position in Panlong

Sun position, daylight and the best solar panel angle for Panlong — computed for 30.64° N, 107.85° E, 737 m above sea level.

Sunrise today06:57103° ESE
Sunset today18:07256° WSW
Best panel angle20°year-round, facing south
Off-grid angle48°best for the darkest month

The sun right now

Azimuth180.0°
Elevation47.3°
At solar noon, 12:32Open on the sun map

Sun in Panlong today

Sunday, 25 October 2026 · local time UTC+8

EventTimeDirection / height
Astronomical dawn05:36sun 18° below horizon
Nautical dawn06:0412° below
Civil dawn06:336° below
Sunrise06:57103° ESE
Golden hour ends07:30sun 6° up
Solar noon12:3247.3° high
Golden hour starts17:34sun 6° up
Sunset18:07256° WSW
Civil dusk18:316° below
Nautical dusk19:0012° below
Astronomical dusk19:2818° below
Day length11 h 10 min

Sun path diagram for Panlong

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 solstice678910111213141516171819EquinoxDecember solstice891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 82.8° at solar noon in Panlong; on the December solstice only 35.9°. 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
January07:4512:5918:1410 h 29 min39.5°
February07:2313:0218:4011 h 17 min48.8°
March06:5112:5519:0012 h 09 min59.6°
April06:1512:4719:2013 h 05 min71.2°
May05:5012:4519:3913 h 49 min79.6°
June05:4612:5019:5414 h 08 min82.8°
July05:5912:5519:5013 h 51 min79.8°
August06:1812:5119:2413 h 06 min71.5°
September06:3612:4118:4612 h 11 min60.1°
October06:5412:3318:1111 h 16 min48.7°
November07:1912:3417:4810 h 29 min39.5°
December07:4112:4617:5110 h 10 min35.9°

A year of daylight in Panlong

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 Panlong

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

20°collects the most energy over a year: 954 kWh per kWp.

48°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 20°Best worst-month 48°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°90995%1.203.3×
15°951100%1.422.7×
20° year-round best954100%1.482.6×
30°94499%1.562.4×
31° = latitude94199%1.572.4×
45°88993%1.632.1×
48° off-grid best87291%1.632.0×
60°79083%1.601.8×
70°70474%1.541.6×
90°50153%1.301.5×

A fixed array in Panlong produces the most over a year at 20°. The design month for an off-grid system is December: at 48° it makes 1.63 kWh per kWp a day, 11% more than at 20°, and costs 9% of the yearly total. Why steep panels win winter.

Off-grid solar in Panlong at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 20° (year-round best).

012345January: 1.61 (70°)1.6JanFebruary: 1.63 (70°)1.6FebMarch: 2.16 (70°)2.2MarApril: 2.20 (70°)2.2AprMay: 1.86 (70°)1.9MayJune: 1.79 (70°)1.8JunJuly: 2.15 (70°)2.2JulAugust: 2.44 (70°)2.4AugSeptember: 2.17 (70°)2.2SepOctober: 1.83 (70°)1.8OctNovember: 1.74 (70°)1.7NovDecember: 1.54 (70°)1.5Dec20°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 20°Mean temp.
January1.621.851.611.604.2 °C
February1.961.891.631.826.9 °C
March2.982.532.162.6711.6 °C
April3.782.632.203.1816.6 °C
May3.862.281.863.0620.4 °C
June4.102.221.793.1423.7 °C
July4.972.682.153.8226.2 °C
August4.813.022.443.8425.7 °C
September3.372.642.172.8621.7 °C
October2.302.201.832.0916.5 °C
November1.802.041.741.7511.1 °C
December1.471.771.541.485.5 °C
Year3.09 avg2.31 avg704 kWh954 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 770 Wp of panels at 70°, versus 800 Wp at 20°. The steep array is 4% smaller for the same winter. Size your own system.

Row spacing in Panlong

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.

3.6 mrow pitch at 70°

2.9 mrow pitch at 20°

Row spacing calculator

How Panlong compares in China

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

1711thof 2,095 places in China for sunshine, shared: 3.09 peak sun hours a day on flat ground.

−24%solar energy a year compared with the average place in China: 954 against 1,262 kWh per kWp.

−3 mindaylight on the longest day, compared with Shanghai: 14 h 08 min against 14 h 11 min.

20°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); Panlong ranks joint 1711th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.54 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 10 h 10 min, +3 min compared with Shanghai.

The sunniest places in China

Solar forecast for Panlong, 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 Panlong

What is the best solar panel angle in Panlong?
For a fixed array facing south, the best year-round tilt in Panlong is 20°, worth about 954 kWh per kWp a year. An off-grid system that has to get through December does better at about 48°.
What time is sunrise and sunset in Panlong today?
On 25 October 2026 the sun rises at 06:57 and sets at 18:07 local time (UTC+8), giving 11 h 10 min of daylight. Solar noon is at 12:32.
How many peak sun hours does Panlong get?
On a flat surface 3.1 hours a day averaged over the year, from 1.5 in December to 5.0 in July. Panels tilted at 70° receive 1.8 sun hours a day in December.
How high does the sun get in Panlong?
At solar noon the sun stands 82.8° above the horizon on the June solstice and 35.9° on the December solstice.
Is Panlong a good place for solar panels?
With 3.1 peak sun hours a day on flat ground, Panlong ranks joint 1711th of 2,095 places in China for sunshine. A 1 kWp array at the best angle (20°) makes about 954 kWh a year here, 24% less than the average place in China.

Places near Panlong

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.