Taiwan · Taiwan · 22.00° N · 120.74° E
Solar position in Hengchun
Sun position, daylight and the best solar panel angle for Hengchun — computed for 22.00° N, 120.74° E, 25 m above sea level.
The sun right now
Sun in Hengchun today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:42 | sun 18° below horizon |
| Nautical dawn | 05:08 | 12° below |
| Civil dawn | 05:34 | 6° below |
| Sunrise | 05:57 | 103° ESE |
| Golden hour ends | 06:27 | sun 6° up |
| Solar noon | 11:41 | 55.9° high |
| Golden hour starts | 16:54 | sun 6° up |
| Sunset | 17:24 | 257° WSW |
| Civil dusk | 17:47 | 6° below |
| Nautical dusk | 18:13 | 12° below |
| Astronomical dusk | 18:39 | 18° below |
| Day length | 11 h 28 min | |
Sun path diagram for Hengchun
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 88.6° at solar noon in Hengchun; on the December solstice only 44.6°. 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 | 06:38 | 12:08 | 17:38 | 11 h 01 min | 48.1° |
| February | 06:24 | 12:10 | 17:57 | 11 h 33 min | 57.4° |
| March | 06:00 | 12:04 | 18:08 | 12 h 08 min | 68.2° |
| April | 05:32 | 11:55 | 18:19 | 12 h 46 min | 79.8° |
| May | 05:15 | 11:53 | 18:31 | 13 h 16 min | 88.2° |
| June | 05:14 | 11:58 | 18:43 | 13 h 29 min | 88.6° |
| July | 05:24 | 12:03 | 18:41 | 13 h 17 min | 88.5° |
| August | 05:36 | 12:00 | 18:23 | 12 h 47 min | 80.1° |
| September | 05:45 | 11:50 | 17:54 | 12 h 09 min | 68.7° |
| October | 05:55 | 11:41 | 17:27 | 11 h 32 min | 57.3° |
| November | 06:12 | 11:42 | 17:12 | 11 h 01 min | 48.1° |
| December | 06:31 | 11:54 | 17:18 | 10 h 47 min | 44.6° |
A year of daylight in Hengchun
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 Hengchun
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
17°collects the most energy over a year: 1373 kWh per kWp.
44°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° | 1324 | 96% | 2.34 | 2.0× |
| 15° | 1373 | 100% | 2.74 | 1.6× |
| 17° year-round best | 1373 | 100% | 2.78 | 1.6× |
| 22° = latitude | 1369 | 100% | 2.88 | 1.5× |
| 30° | 1346 | 98% | 2.99 | 1.3× |
| 44° off-grid best | 1255 | 91% | 3.06 | 1.3× |
| 45° | 1247 | 91% | 3.06 | 1.3× |
| 60° | 1082 | 79% | 2.97 | 1.5× |
| 70° | 943 | 69% | 2.82 | 1.8× |
| 90° | 646 | 47% | 2.30 | 2.4× |
A fixed array in Hengchun produces the most over a year at 17°. The design month for an off-grid system is December: at 44° it makes 3.06 kWh per kWp a day, 10% more than at 17°, and costs 9% of the yearly total. Why steep panels win winter.
Off-grid solar in Hengchun at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 17° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 17° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.23 | 3.56 | 2.95 | 3.01 | 21.9 °C |
| February | 3.91 | 3.72 | 3.08 | 3.51 | 22.4 °C |
| March | 4.45 | 3.41 | 2.80 | 3.77 | 23.4 °C |
| April | 5.09 | 3.01 | 2.44 | 4.07 | 25.4 °C |
| May | 5.45 | 2.50 | 1.99 | 4.14 | 27.3 °C |
| June | 5.77 | 2.25 | 1.78 | 4.26 | 28.4 °C |
| July | 5.89 | 2.38 | 1.88 | 4.38 | 28.8 °C |
| August | 5.19 | 2.73 | 2.18 | 4.01 | 28.6 °C |
| September | 4.97 | 3.42 | 2.75 | 4.05 | 28.1 °C |
| October | 4.48 | 3.98 | 3.23 | 3.90 | 26.8 °C |
| November | 3.57 | 3.83 | 3.14 | 3.27 | 25.3 °C |
| December | 2.97 | 3.41 | 2.82 | 2.78 | 22.9 °C |
| Year | 4.58 avg | 3.18 avg | 943 kWh | 1373 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 660 Wp of panels at 70°, versus 420 Wp at 17°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Hengchun
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.
2.8 mrow pitch at 70°
2.6 mrow pitch at 17°
How Hengchun compares in Taiwan
Against the other 66 places in Taiwan with climate data, for a fixed array at its best angle.
1stof 67 places in Taiwan for sunshine, shared: 4.58 peak sun hours a day on flat ground.
+9%solar energy a year compared with the average place in Taiwan: 1,373 against 1,256 kWh per kWp.
−13 mindaylight on the longest day, compared with Taipei: 13 h 29 min against 13 h 42 min.
17°best year-round tilt here; across Taiwan it runs from 17° in Keelung to 21° in Chiayi City.
Hengchun shares the top spot for sunshine among the 67 places in Taiwan (4.58 peak sun hours a day); the least sunny is Sanzhi with 3.74. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.78 kWh a day here, against 1.85 kWh on average in Taiwan. The shortest day lasts 10 h 47 min, +13 min compared with Taipei.
Solar forecast for Hengchun, 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 Hengchun
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Places near Hengchun
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A free, live card for Hengchun: 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.