Guangdong · China · 23.46° N · 116.77° E
Solar position in Chenghua
Sun position, daylight and the best solar panel angle for Chenghua — computed for 23.46° N, 116.77° E, 13 m above sea level.
The sun right now
Sun in Chenghua today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:58 | sun 18° below horizon |
| Nautical dawn | 05:24 | 12° below |
| Civil dawn | 05:51 | 6° below |
| Sunrise | 06:14 | 103° ESE |
| Golden hour ends | 06:45 | sun 6° up |
| Solar noon | 11:56 | 54.5° high |
| Golden hour starts | 17:08 | sun 6° up |
| Sunset | 17:39 | 257° WSW |
| Civil dusk | 18:02 | 6° below |
| Nautical dusk | 18:28 | 12° below |
| Astronomical dusk | 18:55 | 18° below |
| Day length | 11 h 25 min | |
Sun path diagram for Chenghua
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 90.0° at solar noon in Chenghua; on the December solstice only 43.1°. Sunrise swings from 64° ENE in June to 115° ESE in December — a 51° 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 | 06:56 | 12:24 | 17:52 | 10 h 56 min | 46.6° |
| February | 06:41 | 12:26 | 18:11 | 11 h 30 min | 56.0° |
| March | 06:16 | 12:20 | 18:24 | 12 h 08 min | 66.8° |
| April | 05:47 | 12:11 | 18:36 | 12 h 49 min | 78.4° |
| May | 05:28 | 12:09 | 18:50 | 13 h 21 min | 86.7° |
| June | 05:27 | 12:14 | 19:02 | 13 h 35 min | 90.0° |
| July | 05:38 | 12:19 | 19:00 | 13 h 22 min | 87.0° |
| August | 05:50 | 12:16 | 18:41 | 12 h 50 min | 78.7° |
| September | 06:01 | 12:06 | 18:10 | 12 h 10 min | 67.3° |
| October | 06:12 | 11:57 | 17:42 | 11 h 30 min | 55.9° |
| November | 06:30 | 11:58 | 17:26 | 10 h 56 min | 46.7° |
| December | 06:50 | 12:10 | 17:31 | 10 h 41 min | 43.1° |
A year of daylight in Chenghua
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 Chenghua
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
21°collects the most energy over a year: 1275 kWh per kWp.
26°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 | February kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1209 | 95% | 2.64 | 1.8× |
| 15° | 1270 | 100% | 2.92 | 1.5× |
| 21° year-round best | 1275 | 100% | 2.99 | 1.4× |
| 23° = latitude | 1274 | 100% | 3.01 | 1.4× |
| 26° off-grid best | 1271 | 100% | 3.03 | 1.3× |
| 30° | 1262 | 99% | 3.05 | 1.3× |
| 45° | 1185 | 93% | 3.01 | 1.4× |
| 60° | 1047 | 82% | 2.81 | 1.7× |
| 70° | 925 | 73% | 2.60 | 1.9× |
| 90° | 651 | 51% | 1.99 | 2.6× |
A fixed array in Chenghua produces the most over a year at 21°. The design month for an off-grid system is February: at 26° it makes 3.03 kWh per kWp a day, 1% more than at 21°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Chenghua at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 21° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 21° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.10 | 3.62 | 3.09 | 3.11 | 14.6 °C |
| February | 3.24 | 3.07 | 2.60 | 2.99 | 15.9 °C |
| March | 3.52 | 2.74 | 2.28 | 3.04 | 18.3 °C |
| April | 3.97 | 2.48 | 2.03 | 3.19 | 21.7 °C |
| May | 4.43 | 2.26 | 1.81 | 3.36 | 24.9 °C |
| June | 4.73 | 2.15 | 1.71 | 3.48 | 26.9 °C |
| July | 5.63 | 2.45 | 1.95 | 4.14 | 27.8 °C |
| August | 5.20 | 2.82 | 2.26 | 4.01 | 27.7 °C |
| September | 4.83 | 3.42 | 2.77 | 3.98 | 26.7 °C |
| October | 4.38 | 4.01 | 3.30 | 3.95 | 23.8 °C |
| November | 3.51 | 3.96 | 3.31 | 3.42 | 20.5 °C |
| December | 3.11 | 3.90 | 3.32 | 3.20 | 16.1 °C |
| Year | 4.15 avg | 3.07 avg | 925 kWh | 1275 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 690 Wp of panels at 70°, versus 390 Wp at 21°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Chenghua
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.
2.9 mrow pitch at 70°
2.7 mrow pitch at 21°
How Chenghua compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
393rdof 2,095 places in China for sunshine, shared: 4.14 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in China: 1,275 against 1,262 kWh per kWp.
−36 mindaylight on the longest day, compared with Shanghai: 13 h 35 min against 14 h 11 min.
21°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); Chenghua ranks joint 393rd. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.71 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 10 h 41 min, +34 min compared with Shanghai.
Solar forecast for Chenghua, 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 Chenghua
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Places near Chenghua
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A free, live card for Chenghua: 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.