Heilongjiang · China · 52.90° N · 122.77° E
Solar position in Tuqiang
Sun position, daylight and the best solar panel angle for Tuqiang — computed for 52.90° N, 122.77° E, 536 m above sea level.
The sun right now
Sun in Tuqiang today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:36 | sun 18° below horizon |
| Nautical dawn | 05:16 | 12° below |
| Civil dawn | 05:56 | 6° below |
| Sunrise | 06:32 | 109° ESE |
| Golden hour ends | 07:22 | sun 6° up |
| Solar noon | 11:32 | 25.1° high |
| Golden hour starts | 15:43 | sun 6° up |
| Sunset | 16:32 | 251° WSW |
| Civil dusk | 17:08 | 6° below |
| Nautical dusk | 17:48 | 12° below |
| Astronomical dusk | 18:28 | 18° below |
| Day length | 10 h 00 min | |
Sun path diagram for Tuqiang
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 60.5° at solar noon in Tuqiang; on the December solstice only 13.7°. Sunrise swings from 47° NE in June to 130° SE in December — a 83° 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 | 07:48 | 12:00 | 16:12 | 8 h 24 min | 17.2° |
| February | 06:54 | 12:02 | 17:11 | 10 h 17 min | 26.6° |
| March | 05:50 | 11:56 | 18:03 | 12 h 13 min | 37.3° |
| April | 04:38 | 11:47 | 18:58 | 14 h 20 min | 49.0° |
| May | 03:42 | 11:45 | 19:49 | 16 h 06 min | 57.3° |
| June | 03:23 | 11:50 | 20:18 | 16 h 55 min | 60.5° |
| July | 03:49 | 11:55 | 20:00 | 16 h 10 min | 57.6° |
| August | 04:39 | 11:51 | 19:03 | 14 h 24 min | 49.2° |
| September | 05:32 | 11:41 | 17:50 | 12 h 18 min | 37.8° |
| October | 06:25 | 11:33 | 16:41 | 10 h 16 min | 26.5° |
| November | 07:22 | 11:34 | 15:46 | 8 h 25 min | 17.3° |
| December | 07:59 | 11:46 | 15:34 | 7 h 35 min | 13.7° |
A year of daylight in Tuqiang
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 Tuqiang
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
51°collects the most energy over a year: 1533 kWh per kWp.
70°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1060 | 69% | 0.73 | 6.6× |
| 15° | 1288 | 84% | 1.51 | 3.4× |
| 30° | 1446 | 94% | 2.20 | 2.5× |
| 45° | 1525 | 99% | 2.76 | 2.1× |
| 51° year-round best | 1533 | 100% | 2.93 | 2.0× |
| 53° = latitude | 1532 | 100% | 2.99 | 1.9× |
| 60° | 1519 | 99% | 3.14 | 1.9× |
| 70° off-grid best | 1469 | 96% | 3.28 | 1.8× |
| 90° | 1267 | 83% | 3.29 | 2.3× |
A fixed array in Tuqiang produces the most over a year at 51°. The design month for an off-grid system is December: at 70° it makes 3.28 kWh per kWp a day, 12% more than at 51°, and costs 4% of the yearly total. Why steep panels win winter.
Off-grid solar in Tuqiang at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 51° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 51° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 1.28 | 3.78 | 3.76 | 3.40 | -27.2 °C |
| February snow | 2.35 | 5.26 | 5.17 | 4.87 | -23.3 °C |
| March snow | 3.89 | 6.15 | 5.82 | 5.78 | -13.1 °C |
| April snow | 5.14 | 5.58 | 5.05 | 5.51 | -1.1 °C |
| May | 5.23 | 4.20 | 3.65 | 4.37 | 8.2 °C |
| June | 5.93 | 4.27 | 3.60 | 4.46 | 16.2 °C |
| July | 5.21 | 3.93 | 3.27 | 3.99 | 18.9 °C |
| August | 4.49 | 4.05 | 3.42 | 3.97 | 16.1 °C |
| September | 3.50 | 4.30 | 3.76 | 4.03 | 8.4 °C |
| October snow | 2.28 | 4.32 | 3.94 | 3.79 | -2.2 °C |
| November snow | 1.39 | 3.84 | 3.67 | 3.37 | -15.7 °C |
| December snow | 0.97 | 3.31 | 3.28 | 2.93 | -25.7 °C |
| Year | 3.47 avg | 4.41 avg | 1469 kWh | 1533 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 360 Wp of panels at 70°, versus 400 Wp at 51°. The steep array is 10% smaller for the same winter. Size your own system.
Row spacing in Tuqiang
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.
10.8 mrow pitch at 70°
9.6 mrow pitch at 51°
How Tuqiang compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
1458thof 2,095 places in China for sunshine, shared: 3.48 peak sun hours a day on flat ground.
+21%solar energy a year compared with the average place in China: 1,533 against 1,262 kWh per kWp.
+2 h 44 mindaylight on the longest day, compared with Shanghai: 16 h 55 min against 14 h 11 min.
51°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); Tuqiang ranks joint 1458th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 3.27 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 7 h 35 min, −2 h 32 min compared with Shanghai.
Solar forecast for Tuqiang, 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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A free, live card for Tuqiang: 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.