Solarposition.org

Tuyen Quang · Vietnam · 22.48° N · 104.87° E

Solar position in Bắc Quang

Sun position, daylight and the best solar panel angle for Bắc Quang — computed for 22.48° N, 104.87° E, 70 m above sea level.

Sunrise today06:01103° ESE
Sunset today17:27257° WSW
Best panel angle17°year-round, facing south
Off-grid angle39°best for the darkest month

The sun right now

Azimuth180.0°
Elevation55.4°
At solar noon, 11:44Open on the sun map

Sun in Bắc Quang today

Sunday, 25 October 2026 · local time UTC+7

EventTimeDirection / height
Astronomical dawn04:45sun 18° below horizon
Nautical dawn05:1212° below
Civil dawn05:386° below
Sunrise06:01103° ESE
Golden hour ends06:31sun 6° up
Solar noon11:4455.4° high
Golden hour starts16:57sun 6° up
Sunset17:27257° WSW
Civil dusk17:506° below
Nautical dusk18:1612° below
Astronomical dusk18:4318° below
Day length11 h 27 min

Sun path diagram for Bắc Quang

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 89.0° at solar noon in Bắc Quang; on the December solstice only 44.1°. 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:4212:1117:4110 h 59 min47.6°
February06:2812:1418:0011 h 32 min57.0°
March06:0412:0718:1112 h 08 min67.8°
April05:3511:5918:2312 h 47 min79.4°
May05:1811:5718:3613 h 18 min87.7°
June05:1612:0218:4713 h 31 min89.0°
July05:2712:0618:4613 h 19 min88.0°
August05:3912:0318:2712 h 48 min79.6°
September05:4811:5317:5812 h 09 min68.2°
October05:5911:4517:3011 h 31 min56.8°
November06:1611:4617:1510 h 59 min47.6°
December06:3511:5817:2110 h 45 min44.1°

A year of daylight in Bắc Quang

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 Bắc Quang

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: 1107 kWh per kWp.

39°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 39°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJanuary kWh/kWp/dayBest ÷ worst month
0°107297%1.762.2×
15°1106100%1.991.9×
17° year-round best1107100%2.011.8×
22° = latitude1103100%2.061.7×
30°108598%2.111.6×
39° off-grid best104695%2.131.6×
45°101091%2.121.5×
60°88680%2.021.5×
70°78171%1.891.5×
90°55050%1.521.9×

A fixed array in Bắc Quang produces the most over a year at 17°. The design month for an off-grid system is January: at 39° it makes 2.13 kWh per kWp a day, 6% more than at 17°, and costs 5% of the yearly total. Why steep panels win winter.

Off-grid solar in Bắc Quang at 70°

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

01234January: 1.89 (70°)1.9JanFebruary: 2.12 (70°)2.1FebMarch: 2.01 (70°)2.0MarApril: 2.06 (70°)2.1AprMay: 1.94 (70°)1.9MayJune: 1.84 (70°)1.8JunJuly: 1.87 (70°)1.9JulAugust: 2.13 (70°)2.1AugSeptember: 2.47 (70°)2.5SepOctober: 2.35 (70°)2.3OctNovember: 2.74 (70°)2.7NovDecember: 2.26 (70°)2.3Dec17°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 17°Mean temp.
January2.172.231.892.0112.5 °C
February2.772.512.122.4815.3 °C
March3.202.432.012.7018.7 °C
April4.082.532.063.2822.4 °C
May4.752.411.943.6624.7 °C
June4.642.301.843.5225.8 °C
July4.632.341.873.5325.8 °C
August4.622.642.133.6225.5 °C
September4.323.022.473.5524.0 °C
October3.342.842.352.8921.0 °C
November3.063.262.742.8717.4 °C
December2.372.642.262.2613.0 °C
Year3.67 avg2.59 avg781 kWh1107 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 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 Bắc Quang

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°

2.6 mrow pitch at 17°

Row spacing calculator

How Bắc Quang compares in Vietnam

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

299thof 307 places in Vietnam for sunshine, shared: 3.67 peak sun hours a day on flat ground.

−16%solar energy a year compared with the average place in Vietnam: 1,107 against 1,320 kWh per kWp.

+45 mindaylight on the longest day, compared with Ho Chi Minh City: 13 h 31 min against 12 h 46 min.

17°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); Bắc Quang ranks joint 299th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.84 kWh a day here, against 1.53 kWh on average in Vietnam. The shortest day lasts 10 h 45 min, −44 min compared with Ho Chi Minh City.

The sunniest places in Vietnam

Solar forecast for Bắc Quang, 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 Bắc Quang

What is the best solar panel angle in Bắc Quang?
For a fixed array facing south, the best year-round tilt in Bắc Quang is 17°, worth about 1107 kWh per kWp a year. An off-grid system that has to get through January does better at about 39°.
What time is sunrise and sunset in Bắc Quang today?
On 25 October 2026 the sun rises at 06:01 and sets at 17:27 local time (UTC+7), giving 11 h 27 min of daylight. Solar noon is at 11:44.
How many peak sun hours does Bắc Quang get?
On a flat surface 3.7 hours a day averaged over the year, from 2.2 in January to 4.8 in May. Panels tilted at 70° receive 2.3 sun hours a day in June.
How high does the sun get in Bắc Quang?
At solar noon the sun stands 89.0° above the horizon on the June solstice and 44.1° on the December solstice.
Is Bắc Quang a good place for solar panels?
With 3.7 peak sun hours a day on flat ground, Bắc Quang ranks joint 299th of 307 places in Vietnam for sunshine. A 1 kWp array at the best angle (17°) makes about 1,107 kWh a year here, 16% less than the average place in Vietnam.

Places near Bắc Quang

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.