Gia Lai · Vietnam · 13.40° N · 108.44° E
Solar position in A Yun Pa
Sun position, daylight and the best solar panel angle for A Yun Pa — computed for 13.40° N, 108.44° E, 165 m above sea level.
The sun right now
Sun in A Yun Pa today
Sunday, 25 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:26 | sun 18° below horizon |
| Nautical dawn | 04:51 | 12° below |
| Civil dawn | 05:16 | 6° below |
| Sunrise | 05:38 | 102° ESE |
| Golden hour ends | 06:07 | sun 6° up |
| Solar noon | 11:30 | 64.5° high |
| Golden hour starts | 16:53 | sun 6° up |
| Sunset | 17:22 | 258° WSW |
| Civil dusk | 17:43 | 6° below |
| Nautical dusk | 18:08 | 12° below |
| Astronomical dusk | 18:33 | 18° below |
| Day length | 11 h 44 min | |
Sun path diagram for A Yun Pa
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 80.0° at solar noon in A Yun Pa; on the December solstice only 53.2°. 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.
| Month | Sunrise | Solar noon | Sunset | Day length | Noon elevation |
|---|---|---|---|---|---|
| January | 06:13 | 11:57 | 17:41 | 11 h 28 min | 56.7° |
| February | 06:06 | 11:59 | 17:53 | 11 h 47 min | 66.0° |
| March | 05:50 | 11:53 | 17:57 | 12 h 07 min | 76.8° |
| April | 05:30 | 11:45 | 18:00 | 12 h 30 min | 88.5° |
| May | 05:19 | 11:42 | 18:06 | 12 h 48 min | 83.2° |
| June | 05:20 | 11:48 | 18:15 | 12 h 55 min | 80.0° |
| July | 05:28 | 11:52 | 18:16 | 12 h 48 min | 82.9° |
| August | 05:34 | 11:49 | 18:04 | 12 h 30 min | 88.7° |
| September | 05:35 | 11:39 | 17:43 | 12 h 08 min | 77.3° |
| October | 05:37 | 11:30 | 17:23 | 11 h 46 min | 65.9° |
| November | 05:48 | 11:31 | 17:15 | 11 h 28 min | 56.7° |
| December | 06:04 | 11:44 | 17:24 | 11 h 20 min | 53.2° |
A year of daylight in A Yun Pa
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 A Yun Pa
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: 1434 kWh per kWp.
25°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° | 1410 | 98% | 2.88 | 1.6× |
| 12° year-round best | 1434 | 100% | 3.19 | 1.5× |
| 13° = latitude | 1434 | 100% | 3.21 | 1.5× |
| 15° | 1432 | 100% | 3.25 | 1.4× |
| 25° off-grid best | 1404 | 98% | 3.40 | 1.4× |
| 30° | 1377 | 96% | 3.44 | 1.5× |
| 45° | 1247 | 87% | 3.45 | 1.7× |
| 60° | 1054 | 74% | 3.25 | 2.2× |
| 70° | 900 | 63% | 3.03 | 2.7× |
| 90° | 612 | 43% | 2.35 | 2.6× |
A fixed array in A Yun Pa produces the most over a year at 12°. The design month for an off-grid system is December: at 25° it makes 3.40 kWh per kWp a day, 7% more than at 12°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in A Yun Pa at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 12° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 12° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.26 | 4.29 | 3.56 | 3.80 | 21.8 °C |
| February | 5.27 | 4.49 | 3.71 | 4.55 | 23.0 °C |
| March | 5.67 | 3.73 | 3.05 | 4.66 | 25.2 °C |
| April | 5.97 | 2.77 | 2.22 | 4.66 | 27.3 °C |
| May | 5.70 | 2.04 | 1.61 | 4.30 | 27.9 °C |
| June | 5.22 | 1.78 | 1.39 | 3.90 | 27.4 °C |
| July | 4.98 | 1.85 | 1.46 | 3.75 | 26.9 °C |
| August | 4.71 | 2.16 | 1.72 | 3.64 | 26.7 °C |
| September | 4.73 | 2.83 | 2.29 | 3.79 | 26.1 °C |
| October | 4.37 | 3.30 | 2.69 | 3.63 | 25.0 °C |
| November | 3.84 | 3.56 | 2.93 | 3.33 | 23.9 °C |
| December | 3.61 | 3.65 | 3.03 | 3.19 | 22.3 °C |
| Year | 4.86 avg | 3.03 avg | 900 kWh | 1434 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 850 Wp of panels at 70°, versus 370 Wp at 12°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in A Yun Pa
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.
2.3 mrow pitch at 70°
2.3 mrow pitch at 12°
How A Yun Pa compares in Vietnam
Against the other 306 places in Vietnam with climate data, for a fixed array at its best angle.
135thof 307 places in Vietnam for sunshine: 4.86 peak sun hours a day on flat ground.
+9%solar energy a year compared with the average place in Vietnam: 1,434 against 1,320 kWh per kWp.
+9 mindaylight on the longest day, compared with Ho Chi Minh City: 12 h 55 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); A Yun Pa ranks 135th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.40 kWh a day here, against 1.53 kWh on average in Vietnam. The shortest day lasts 11 h 20 min, −9 min compared with Ho Chi Minh City.
Solar forecast for A Yun Pa, 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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A free, live card for A Yun Pa: 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.