Solarposition.org

Dong Nai · Vietnam · 10.94° N · 106.82° E

Solar position in Biên Hòa

Sun position, daylight and the best solar panel angle for Biên Hòa — computed for 10.94° N, 106.82° E, 6 m above sea level.

Sunrise today05:42102° ESE
Sunset today17:30258° WSW
Best panel angle12°year-round, facing south
Off-grid angle5°best for the darkest month

The sun right now

Azimuth180.0°
Elevation67.0°
At solar noon, 11:36Open on the sun map

Sun in Biên Hòa today

Sunday, 25 October 2026 · local time UTC+7

EventTimeDirection / height
Astronomical dawn04:31sun 18° below horizon
Nautical dawn04:5612° below
Civil dawn05:216° below
Sunrise05:42102° ESE
Golden hour ends06:11sun 6° up
Solar noon11:3667.0° high
Golden hour starts17:02sun 6° up
Sunset17:30258° WSW
Civil dusk17:526° below
Nautical dusk18:1712° below
Astronomical dusk18:4118° below
Day length11 h 48 min

Sun path diagram for Biên Hòa

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 77.5° at solar noon in Biên Hòa; on the December solstice only 55.6°. 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
January06:1612:0317:5111 h 35 min59.2°
February06:1112:0618:0111 h 50 min68.5°
March05:5611:5918:0312 h 07 min79.3°
April05:3811:5118:0412 h 25 min89.1°
May05:2911:4918:0912 h 40 min80.8°
June05:3111:5418:1712 h 46 min77.5°
July05:3811:5918:1912 h 40 min80.5°
August05:4211:5518:0812 h 26 min88.8°
September05:4111:4517:4912 h 08 min79.8°
October05:4211:3717:3211 h 50 min68.4°
November05:5011:3817:2611 h 35 min59.2°
December06:0611:5017:3511 h 29 min55.6°

A year of daylight in Biên Hòa

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 Biên Hòa

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

12°collects the most energy over a year: 1536 kWh per kWp.

5°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 12°Best worst-month 5°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJuly kWh/kWp/dayBest ÷ worst month
0°151098%3.921.3×
5° off-grid best152799%3.851.3×
11° = latitude1536100%3.741.3×
12° year-round best1536100%3.711.3×
15°1535100%3.641.4×
30°147596%3.181.6×
45°133687%2.562.0×
60°112773%1.842.6×
70°96263%1.393.2×
90°65743%1.093.0×

A fixed array in Biên Hòa produces the most over a year at 12°. The design month for an off-grid system is July: at 5° it makes 3.85 kWh per kWp a day, 4% more than at 12°, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Biên Hòa at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 12° (year-round best).

0123456January: 4.13 (70°)4.1JanFebruary: 3.93 (70°)3.9FebMarch: 3.06 (70°)3.1MarApril: 2.08 (70°)2.1AprMay: 1.47 (70°)1.5MayJune: 1.30 (70°)1.3JunJuly: 1.39 (70°)1.4JulAugust: 1.70 (70°)1.7AugSeptember: 2.23 (70°)2.2SepOctober: 2.90 (70°)2.9OctNovember: 3.60 (70°)3.6NovDecember: 3.90 (70°)3.9Dec12°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 12°Mean temp.
January5.145.054.134.5026.1 °C
February5.904.833.934.9827.4 °C
March6.113.803.064.9129.0 °C
April6.062.622.084.6529.9 °C
May5.451.881.474.0729.0 °C
June5.051.671.303.7527.5 °C
July4.951.761.393.7126.8 °C
August4.922.131.703.7826.7 °C
September4.822.772.233.8326.7 °C
October4.913.572.904.0526.6 °C
November4.864.423.604.1826.4 °C
December4.744.773.904.1625.8 °C
Year5.24 avg3.26 avg962 kWh1536 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 12°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Biên Hòa

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 12°

Row spacing calculator

How Biên Hòa compares in Vietnam

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

28thof 307 places in Vietnam for sunshine, shared: 5.24 peak sun hours a day on flat ground.

+16%solar energy a year compared with the average place in Vietnam: 1,536 against 1,320 kWh per kWp.

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

12°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); Biên Hòa ranks joint 28th. 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 29 min, ±0 min compared with Ho Chi Minh City.

The sunniest places in Vietnam

Solar forecast for Biên Hòa, 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 Biên Hòa

What is the best solar panel angle in Biên Hòa?
For a fixed array facing south, the best year-round tilt in Biên Hòa is 12°, worth about 1536 kWh per kWp a year. An off-grid system that has to get through July does better at about 5°.
What time is sunrise and sunset in Biên Hòa today?
On 25 October 2026 the sun rises at 05:42 and sets at 17:30 local time (UTC+7), giving 11 h 48 min of daylight. Solar noon is at 11:36.
How many peak sun hours does Biên Hòa get?
On a flat surface 5.2 hours a day averaged over the year, from 4.7 in December to 6.1 in March. Panels tilted at 70° receive 1.7 sun hours a day in June.
How high does the sun get in Biên Hòa?
At solar noon the sun stands 77.5° above the horizon on the June solstice and 55.6° on the December solstice.
Is Biên Hòa a good place for solar panels?
With 5.2 peak sun hours a day on flat ground, Biên Hòa ranks joint 28th of 307 places in Vietnam for sunshine. A 1 kWp array at the best angle (12°) makes about 1,536 kWh a year here, 16% more than the average place in Vietnam.

Places near Biên Hòa

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.