Xinjiang · China · 37.08° N · 80.18° E
Solar position in Lop
Sun position, daylight and the best solar panel angle for Lop — computed for 37.08° N, 80.18° E, 1330 m above sea level.
The sun right now
Sun in Lop today
Saturday, 24 October 2026 · local time UTC+6
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:28 | sun 18° below horizon |
| Nautical dawn | 05:58 | 12° below |
| Civil dawn | 06:28 | 6° below |
| Sunrise | 06:55 | 104° ESE |
| Golden hour ends | 07:31 | sun 6° up |
| Solar noon | 12:23 | 41.2° high |
| Golden hour starts | 17:15 | sun 6° up |
| Sunset | 17:51 | 256° WSW |
| Civil dusk | 18:17 | 6° below |
| Nautical dusk | 18:48 | 12° below |
| Astronomical dusk | 19:18 | 18° below |
| Day length | 10 h 56 min | |
Sun path diagram for Lop
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 76.4° at solar noon in Lop; on the December solstice only 29.5°. Sunrise swings from 59° ENE in June to 119° ESE in December — a 60° 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 | 07:49 | 12:50 | 17:51 | 10 h 02 min | 33.1° |
| February | 07:21 | 12:53 | 18:25 | 11 h 04 min | 42.4° |
| March | 06:41 | 12:46 | 18:51 | 12 h 10 min | 53.2° |
| April | 05:57 | 12:38 | 19:19 | 13 h 22 min | 64.8° |
| May | 05:26 | 12:35 | 19:45 | 14 h 18 min | 73.1° |
| June | 05:19 | 12:41 | 20:02 | 14 h 43 min | 76.4° |
| July | 05:35 | 12:45 | 19:55 | 14 h 20 min | 73.4° |
| August | 06:00 | 12:42 | 19:23 | 13 h 23 min | 65.0° |
| September | 06:26 | 12:32 | 18:38 | 12 h 12 min | 53.6° |
| October | 06:52 | 12:23 | 17:55 | 11 h 03 min | 42.2° |
| November | 07:23 | 12:24 | 17:25 | 10 h 02 min | 33.0° |
| December | 07:48 | 12:37 | 17:25 | 9 h 37 min | 29.5° |
A year of daylight in Lop
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 Lop
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
37°collects the most energy over a year: 1809 kWh per kWp.
40°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 | January kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1508 | 83% | 2.43 | 2.5× |
| 15° | 1702 | 94% | 3.37 | 1.7× |
| 30° | 1799 | 99% | 4.13 | 1.3× |
| 37° year-round best = latitude | 1809 | 100% | 4.41 | 1.3× |
| 40° off-grid best | 1806 | 100% | 4.52 | 1.2× |
| 45° | 1793 | 99% | 4.67 | 1.3× |
| 60° | 1688 | 93% | 4.94 | 1.5× |
| 70° | 1566 | 87% | 4.98 | 1.7× |
| 90° | 1219 | 67% | 4.68 | 2.9× |
A fixed array in Lop produces the most over a year at 37°. The design month for an off-grid system is January: at 40° it makes 4.52 kWh per kWp a day, 2% more than at 37°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Lop at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 37° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 37° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.83 | 5.38 | 4.98 | 4.41 | -6.4 °C |
| February snow | 3.79 | 5.74 | 5.23 | 4.98 | -2.2 °C |
| March | 5.22 | 5.50 | 4.87 | 5.55 | 5.5 °C |
| April | 6.17 | 4.73 | 4.07 | 5.40 | 12.4 °C |
| May | 6.80 | 4.07 | 3.43 | 5.20 | 17.0 °C |
| June | 6.74 | 3.62 | 3.00 | 4.81 | 20.8 °C |
| July | 6.46 | 3.65 | 2.99 | 4.68 | 23.1 °C |
| August | 5.76 | 3.96 | 3.28 | 4.59 | 22.1 °C |
| September | 5.33 | 4.90 | 4.15 | 5.04 | 16.9 °C |
| October | 4.61 | 5.99 | 5.21 | 5.46 | 10.0 °C |
| November | 3.37 | 5.80 | 5.20 | 4.92 | 2.1 °C |
| December snow | 2.69 | 5.61 | 5.15 | 4.46 | -4.5 °C |
| Year | 4.99 avg | 4.91 avg | 1566 kWh | 1809 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 390 Wp of panels at 70°, versus 270 Wp at 37°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Lop
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.
4.5 mrow pitch at 70°
4.0 mrow pitch at 37°
How Lop compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
48thof 2,095 places in China for sunshine, shared: 4.99 peak sun hours a day on flat ground.
+43%solar energy a year compared with the average place in China: 1,809 against 1,262 kWh per kWp.
+32 mindaylight on the longest day, compared with Shanghai: 14 h 43 min against 14 h 11 min.
37°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); Lop ranks joint 48th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.99 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 9 h 37 min, −30 min compared with Shanghai.
Solar forecast for Lop, 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 Lop
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Places near Lop
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A free, live card for Lop: 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.