Hebei · China · 40.00° N · 119.75° E
Solar position in Shanhaiguan
Sun position, daylight and the best solar panel angle for Shanhaiguan — computed for 40.00° N, 119.75° E, 4 m above sea level.
The sun right now
Sun in Shanhaiguan today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:50 | sun 18° below horizon |
| Nautical dawn | 05:22 | 12° below |
| Civil dawn | 05:54 | 6° below |
| Sunrise | 06:21 | 105° ESE |
| Golden hour ends | 06:59 | sun 6° up |
| Solar noon | 11:44 | 37.9° high |
| Golden hour starts | 16:30 | sun 6° up |
| Sunset | 17:07 | 255° WSW |
| Civil dusk | 17:35 | 6° below |
| Nautical dusk | 18:07 | 12° below |
| Astronomical dusk | 18:38 | 18° below |
| Day length | 10 h 46 min | |
Sun path diagram for Shanhaiguan
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 73.4° at solar noon in Shanhaiguan; on the December solstice only 26.6°. Sunrise swings from 58° ENE in June to 120° ESE in December — a 63° 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 | 07:18 | 12:12 | 17:06 | 9 h 48 min | 30.1° |
| February | 06:46 | 12:14 | 17:43 | 10 h 57 min | 39.4° |
| March | 06:03 | 12:08 | 18:13 | 12 h 10 min | 50.2° |
| April | 05:15 | 11:59 | 18:45 | 13 h 30 min | 61.9° |
| May | 04:41 | 11:57 | 19:14 | 14 h 33 min | 70.2° |
| June | 04:32 | 12:02 | 19:33 | 15 h 01 min | 73.4° |
| July | 04:49 | 12:07 | 19:25 | 14 h 36 min | 70.5° |
| August | 05:17 | 12:04 | 18:49 | 13 h 32 min | 62.1° |
| September | 05:47 | 11:53 | 18:00 | 12 h 13 min | 50.7° |
| October | 06:17 | 11:45 | 17:13 | 10 h 56 min | 39.3° |
| November | 06:52 | 11:46 | 16:40 | 9 h 48 min | 30.1° |
| December | 07:19 | 11:58 | 16:38 | 9 h 20 min | 26.6° |
A year of daylight in Shanhaiguan
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 Shanhaiguan
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
40°collects the most energy over a year: 1510 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 | November kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1223 | 81% | 2.02 | 2.7× |
| 15° | 1397 | 93% | 2.76 | 1.9× |
| 30° | 1493 | 99% | 3.33 | 1.5× |
| 40° year-round best off-grid best = latitude | 1510 | 100% | 3.59 | 1.4× |
| 45° | 1504 | 100% | 3.68 | 1.4× |
| 60° | 1431 | 95% | 3.81 | 1.6× |
| 70° | 1339 | 89% | 3.75 | 1.9× |
| 90° | 1065 | 71% | 3.34 | 2.8× |
A fixed array in Shanhaiguan produces the most over a year at 40°. The design month for an off-grid system is November: at 40° it makes 3.59 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Shanhaiguan at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 40° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 40° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.44 | 5.01 | 4.61 | 4.10 | -4.9 °C |
| February snow | 3.23 | 5.13 | 4.69 | 4.46 | -2.6 °C |
| March | 4.49 | 4.97 | 4.45 | 4.97 | 2.6 °C |
| April | 5.27 | 4.28 | 3.72 | 4.74 | 9.3 °C |
| May | 5.88 | 3.80 | 3.20 | 4.57 | 16.2 °C |
| June | 5.37 | 3.22 | 2.65 | 3.89 | 21.2 °C |
| July | 4.93 | 3.10 | 2.51 | 3.60 | 24.5 °C |
| August | 4.82 | 3.54 | 2.89 | 3.85 | 24.2 °C |
| September | 4.38 | 4.21 | 3.52 | 4.15 | 19.9 °C |
| October | 3.37 | 4.37 | 3.76 | 3.95 | 12.9 °C |
| November | 2.45 | 4.22 | 3.75 | 3.59 | 4.4 °C |
| December snow | 2.14 | 4.74 | 4.33 | 3.78 | -2.6 °C |
| Year | 4.07 avg | 4.21 avg | 1339 kWh | 1510 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 470 Wp of panels at 70°, versus 330 Wp at 40°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Shanhaiguan
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.
5.0 mrow pitch at 70°
4.5 mrow pitch at 40°
How Shanhaiguan compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
449thof 2,095 places in China for sunshine, shared: 4.07 peak sun hours a day on flat ground.
+20%solar energy a year compared with the average place in China: 1,510 against 1,262 kWh per kWp.
+50 mindaylight on the longest day, compared with Shanghai: 15 h 01 min against 14 h 11 min.
40°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); Shanhaiguan ranks joint 449th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.51 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 9 h 20 min, −47 min compared with Shanghai.
Solar forecast for Shanhaiguan, 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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Places near Shanhaiguan
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A free, live card for Shanhaiguan: 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.