Solarposition.org

An Giang · Vietnam · 10.76° N · 105.27° E

Solar position in Ấp Long Thạnh

Sun position, daylight and the best solar panel angle for Ấp Long Thạnh — computed for 10.76° N, 105.27° E, 7 m above sea level.

Sunrise today05:48102° ESE
Sunset today17:37258° WSW
Best panel angle11°year-round, facing south
Off-grid angle3°best for the darkest month

The sun right now

Azimuth180.0°
Elevation67.2°
At solar noon, 11:42Open on the sun map

Sun in Ấp Long Thạnh today

Sunday, 25 October 2026 · local time UTC+7

EventTimeDirection / height
Astronomical dawn04:37sun 18° below horizon
Nautical dawn05:0212° below
Civil dawn05:276° below
Sunrise05:48102° ESE
Golden hour ends06:17sun 6° up
Solar noon11:4267.2° high
Golden hour starts17:08sun 6° up
Sunset17:37258° WSW
Civil dusk17:586° below
Nautical dusk18:2312° below
Astronomical dusk18:4818° below
Day length11 h 48 min

Sun path diagram for Ấp Long Thạnh

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 77.3° at solar noon in Ấp Long Thạnh; on the December solstice only 55.8°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 48° 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
January06:2212:1017:5811 h 36 min59.3°
February06:1712:1218:0711 h 51 min68.7°
March06:0212:0618:0912 h 07 min79.5°
April05:4511:5718:1012 h 25 min88.9°
May05:3511:5518:1512 h 39 min80.6°
June05:3712:0018:2312 h 45 min77.3°
July05:4512:0518:2512 h 40 min80.3°
August05:4912:0218:1412 h 25 min88.7°
September05:4811:5217:5512 h 08 min79.9°
October05:4811:4317:3811 h 50 min68.6°
November05:5611:4417:3211 h 36 min59.3°
December06:1111:5617:4111 h 30 min55.8°

A year of daylight in Ấp Long Thạnh

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 Ấp Long Thạnh

Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

11°collects the most energy over a year: 1505 kWh per kWp.

3°gives the most in the darkest month — the one an off-grid system is sized for.

20%30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 11°Best worst-month 3°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJuly kWh/kWp/dayBest ÷ worst month
0°148298%3.871.2×
3° off-grid best149399%3.831.2×
11° year-round best = latitude1505100%3.691.2×
15°1503100%3.601.3×
30°144396%3.151.5×
45°130687%2.541.8×
60°110273%1.842.4×
70°94163%1.393.0×
90°64843%1.102.9×

A fixed array in Ấp Long Thạnh produces the most over a year at 11°. The design month for an off-grid system is July: at 3° it makes 3.83 kWh per kWp a day, 4% more than at 11°, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Ấp Long Thạnh at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 11° (year-round best).

012345January: 3.95 (70°)3.9JanFebruary: 3.58 (70°)3.6FebMarch: 2.88 (70°)2.9MarApril: 2.05 (70°)2.1AprMay: 1.49 (70°)1.5MayJune: 1.31 (70°)1.3JunJuly: 1.39 (70°)1.4JulAugust: 1.70 (70°)1.7AugSeptember: 2.22 (70°)2.2SepOctober: 2.86 (70°)2.9OctNovember: 3.59 (70°)3.6NovDecember: 3.99 (70°)4.0Dec11°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 11°Mean temp.
January5.034.853.954.3326.8 °C
February5.544.433.584.6028.5 °C
March5.743.602.884.5830.2 °C
April5.812.602.054.4630.9 °C
May5.421.901.494.0729.4 °C
June5.111.681.313.8127.9 °C
July4.901.771.393.6927.3 °C
August4.912.131.703.7827.1 °C
September4.832.762.223.8327.0 °C
October4.863.532.863.9926.8 °C
November4.894.413.594.1726.6 °C
December4.844.883.994.2226.1 °C
Year5.15 avg3.20 avg941 kWh1505 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 900 Wp of panels at 70°, versus 320 Wp at 11°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Ấp Long Thạnh

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.

2.1 mrow pitch at 70°

2.3 mrow pitch at 11°

Row spacing calculator

How Ấp Long Thạnh compares in Vietnam

Against the other 306 places in Vietnam with climate data, for a fixed array at its best angle.

60thof 307 places in Vietnam for sunshine, shared: 5.15 peak sun hours a day on flat ground.

+14%solar energy a year compared with the average place in Vietnam: 1,505 against 1,320 kWh per kWp.

±0 mindaylight on the longest day, compared with Ho Chi Minh City: 12 h 45 min against 12 h 46 min.

11°best year-round tilt here; across Vietnam it runs from 9° in Vĩnh Châu to 21° in Dien Bien Phu.

Of the 307 places in Vietnam, Phú Quý gets the most sun (5.45 peak sun hours a day) and Thị Trấn Thất Khê and one other place the least (3.61); Ấp Long Thạnh ranks joint 60th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.31 kWh a day here, against 1.53 kWh on average in Vietnam. The shortest day lasts 11 h 30 min, ±0 min compared with Ho Chi Minh City.

The sunniest places in Vietnam

Solar forecast for Ấp Long Thạnh, 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 Ấp Long Thạnh

What is the best solar panel angle in Ấp Long Thạnh?
For a fixed array facing south, the best year-round tilt in Ấp Long Thạnh is 11°, worth about 1505 kWh per kWp a year. An off-grid system that has to get through July does better at about 3°.
What time is sunrise and sunset in Ấp Long Thạnh today?
On 25 October 2026 the sun rises at 05:48 and sets at 17:37 local time (UTC+7), giving 11 h 48 min of daylight. Solar noon is at 11:42.
How many peak sun hours does Ấp Long Thạnh get?
On a flat surface 5.2 hours a day averaged over the year, from 4.8 in September to 5.8 in April. Panels tilted at 70° receive 1.7 sun hours a day in June.
How high does the sun get in Ấp Long Thạnh?
At solar noon the sun stands 77.3° above the horizon on the June solstice and 55.8° on the December solstice.
Is Ấp Long Thạnh a good place for solar panels?
With 5.2 peak sun hours a day on flat ground, Ấp Long Thạnh ranks joint 60th of 307 places in Vietnam for sunshine. A 1 kWp array at the best angle (11°) makes about 1,505 kWh a year here, 14% more than the average place in Vietnam.

Places near Ấp Long Thạnh

All places in Vietnam

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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.