Solarposition.org

Taiwan · Taiwan · 25.08° N · 121.59° E

Solar position in Neihu

Sun position, daylight and the best solar panel angle for Neihu — computed for 25.08° N, 121.59° E, 18 m above sea level.

Sunrise today05:56103° ESE
Sunset today17:18257° WSW
Best panel angle17°year-round, facing south
Off-grid angle43°best for the darkest month

The sun right now

Azimuth180.0°
Elevation52.9°
At solar noon, 11:37Open on the sun map

Sun in Neihu today

Sunday, 25 October 2026 · local time UTC+8

EventTimeDirection / height
Astronomical dawn04:40sun 18° below horizon
Nautical dawn05:0612° below
Civil dawn05:336° below
Sunrise05:56103° ESE
Golden hour ends06:28sun 6° up
Solar noon11:3752.9° high
Golden hour starts16:47sun 6° up
Sunset17:18257° WSW
Civil dusk17:416° below
Nautical dusk18:0812° below
Astronomical dusk18:3518° below
Day length11 h 21 min

Sun path diagram for Neihu

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice6789101112131415161718EquinoxDecember solstice7891011121314151617Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 88.4° at solar noon in Neihu; on the December solstice only 41.5°. Sunrise swings from 64° ENE in June to 116° ESE in December — a 52° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:3912:0417:2910 h 50 min45.0°
February06:2312:0717:5111 h 27 min54.4°
March05:5712:0118:0512 h 08 min65.1°
April05:2611:5218:1812 h 52 min76.8°
May05:0611:5018:3313 h 27 min85.1°
June05:0411:5518:4613 h 42 min88.4°
July05:1512:0018:4413 h 29 min85.4°
August05:2911:5618:2312 h 54 min77.0°
September05:4111:4617:5112 h 10 min65.6°
October05:5411:3817:2111 h 27 min54.3°
November06:1411:3917:0410 h 50 min45.0°
December06:3411:5117:0810 h 35 min41.5°

A year of daylight in Neihu

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Neihu

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: 1133 kWh per kWp.

43°gives the most in the darkest month — the one an off-grid system is sized for.

40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 17°Best worst-month 43°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearDecember kWh/kWp/dayBest ÷ worst month
0°109396%1.682.8×
15°1132100%1.972.3×
17° year-round best1133100%2.002.3×
25° = latitude112599%2.102.1×
30°111298%2.151.9×
43° off-grid best104792%2.221.7×
45°103391%2.221.6×
60°90280%2.161.4×
70°79170%2.051.5×
90°54348%1.701.9×

A fixed array in Neihu produces the most over a year at 17°. The design month for an off-grid system is December: at 43° it makes 2.22 kWh per kWp a day, 11% more than at 17°, and costs 8% of the yearly total. Why steep panels win winter.

Off-grid solar in Neihu at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 17° (year-round best).

012345January: 2.02 (70°)2.0JanFebruary: 1.98 (70°)2.0FebMarch: 2.05 (70°)2.0MarApril: 1.95 (70°)1.9AprMay: 1.83 (70°)1.8MayJune: 1.85 (70°)1.8JunJuly: 2.11 (70°)2.1JulAugust: 2.43 (70°)2.4AugSeptember: 2.68 (70°)2.7SepOctober: 2.71 (70°)2.7OctNovember: 2.30 (70°)2.3NovDecember: 2.05 (70°)2.1Dec17°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 17°Mean temp.
January2.182.402.022.0416.2 °C
February2.512.371.982.2516.8 °C
March3.122.462.052.6718.3 °C
April3.692.381.953.0021.3 °C
May4.262.281.833.3124.2 °C
June4.932.311.853.7426.3 °C
July6.022.652.114.5527.6 °C
August5.473.032.434.3027.6 °C
September4.553.312.683.7726.3 °C
October3.603.302.713.1823.7 °C
November2.592.792.302.3821.2 °C
December2.122.462.052.0017.8 °C
Year3.76 avg2.65 avg791 kWh1133 kWh

Sizing example. To run a 1 kWh-per-day load through May on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 640 Wp of panels at 70°, versus 590 Wp at 17°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Neihu

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.

3.1 mrow pitch at 70°

2.7 mrow pitch at 17°

Row spacing calculator

How Neihu compares in Taiwan

Against the other 66 places in Taiwan with climate data, for a fixed array at its best angle.

64thof 67 places in Taiwan for sunshine, shared: 3.76 peak sun hours a day on flat ground.

−10%solar energy a year compared with the average place in Taiwan: 1,133 against 1,256 kWh per kWp.

±0 mindaylight on the longest day, compared with Taipei: 13 h 42 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.

Of the 67 places in Taiwan, Donggang and one other place get the most sun (4.59 peak sun hours a day) and Sanzhi the least (3.74); Neihu ranks joint 64th. In its darkest month, May, 1 kWp of off-grid panels at 70° makes 1.83 kWh a day here, against 1.85 kWh on average in Taiwan. The shortest day lasts 10 h 35 min, ±0 min compared with Taipei.

The sunniest places in Taiwan

Solar forecast for Neihu, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Neihu

What is the best solar panel angle in Neihu?
For a fixed array facing south, the best year-round tilt in Neihu is 17°, worth about 1133 kWh per kWp a year. An off-grid system that has to get through December does better at about 43°.
What time is sunrise and sunset in Neihu today?
On 25 October 2026 the sun rises at 05:56 and sets at 17:18 local time (UTC+8), giving 11 h 21 min of daylight. Solar noon is at 11:37.
How many peak sun hours does Neihu get?
On a flat surface 3.8 hours a day averaged over the year, from 2.1 in December to 6.0 in July. Panels tilted at 70° receive 2.3 sun hours a day in May.
How high does the sun get in Neihu?
At solar noon the sun stands 88.4° above the horizon on the June solstice and 41.5° on the December solstice.
Is Neihu a good place for solar panels?
With 3.8 peak sun hours a day on flat ground, Neihu ranks joint 64th of 67 places in Taiwan for sunshine. A 1 kWp array at the best angle (17°) makes about 1,133 kWh a year here, 10% less than the average place in Taiwan.

Places near Neihu

All places in Taiwan

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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.