Quang Ngai · Vietnam · 14.81° N · 108.96° E
Solar position in Đức Phổ
Sun position, daylight and the best solar panel angle for Đức Phổ — computed for 14.81° N, 108.96° E, 17 m above sea level.
The sun right now
Sun in Đức Phổ today
Sunday, 25 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:25 | sun 18° below horizon |
| Nautical dawn | 04:50 | 12° below |
| Civil dawn | 05:15 | 6° below |
| Sunrise | 05:37 | 102° ESE |
| Golden hour ends | 06:06 | sun 6° up |
| Solar noon | 11:28 | 63.1° high |
| Golden hour starts | 16:49 | sun 6° up |
| Sunset | 17:18 | 258° WSW |
| Civil dusk | 17:40 | 6° below |
| Nautical dusk | 18:05 | 12° below |
| Astronomical dusk | 18:30 | 18° below |
| Day length | 11 h 41 min | |
Sun path diagram for Đức Phổ
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 81.4° at solar noon in Đức Phổ; on the December solstice only 51.8°. Sunrise swings from 65° ENE in June to 114° ESE in December — a 49° 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 | 11:55 | 17:37 | 11 h 24 min | 55.3° |
| February | 06:05 | 11:57 | 17:50 | 11 h 44 min | 64.6° |
| March | 05:47 | 11:51 | 17:55 | 12 h 07 min | 75.4° |
| April | 05:26 | 11:42 | 17:59 | 12 h 32 min | 87.0° |
| May | 05:14 | 11:40 | 18:06 | 12 h 52 min | 84.6° |
| June | 05:15 | 11:45 | 18:16 | 13 h 00 min | 81.4° |
| July | 05:24 | 11:50 | 18:16 | 12 h 53 min | 84.3° |
| August | 05:30 | 11:47 | 18:03 | 12 h 33 min | 87.3° |
| September | 05:33 | 11:37 | 17:41 | 12 h 08 min | 75.9° |
| October | 05:36 | 11:28 | 17:20 | 11 h 44 min | 64.5° |
| November | 05:48 | 11:29 | 17:11 | 11 h 23 min | 55.3° |
| December | 06:04 | 11:42 | 17:19 | 11 h 15 min | 51.8° |
A year of daylight in Đức Phổ
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 Đức Phổ
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: 1422 kWh per kWp.
38°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° | 1403 | 99% | 2.44 | 2.0× |
| 11° year-round best | 1422 | 100% | 2.68 | 1.7× |
| 15° = latitude | 1419 | 100% | 2.75 | 1.7× |
| 30° | 1357 | 95% | 2.91 | 1.5× |
| 38° off-grid best | 1293 | 91% | 2.93 | 1.4× |
| 45° | 1221 | 86% | 2.92 | 1.5× |
| 60° | 1023 | 72% | 2.76 | 1.9× |
| 70° | 867 | 61% | 2.57 | 2.4× |
| 90° | 581 | 41% | 2.01 | 2.3× |
A fixed array in Đức Phổ produces the most over a year at 11°. The design month for an off-grid system is December: at 38° it makes 2.93 kWh per kWp a day, 9% more than at 11°, and costs 9% of the yearly total. Why steep panels win winter.
Off-grid solar in Đức Phổ at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 11° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 11° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.68 | 3.70 | 3.07 | 3.24 | 21.8 °C |
| February | 4.76 | 4.12 | 3.41 | 4.10 | 22.5 °C |
| March | 5.31 | 3.59 | 2.95 | 4.39 | 24.2 °C |
| April | 5.90 | 2.84 | 2.30 | 4.66 | 26.2 °C |
| May | 6.01 | 2.12 | 1.68 | 4.58 | 27.5 °C |
| June | 5.78 | 1.82 | 1.43 | 4.33 | 27.9 °C |
| July | 5.56 | 1.91 | 1.50 | 4.20 | 27.7 °C |
| August | 5.31 | 2.36 | 1.88 | 4.11 | 27.6 °C |
| September | 4.98 | 3.01 | 2.43 | 3.99 | 27.0 °C |
| October | 4.16 | 3.21 | 2.62 | 3.45 | 25.6 °C |
| November | 3.55 | 3.35 | 2.75 | 3.06 | 24.4 °C |
| December | 3.07 | 3.12 | 2.57 | 2.68 | 22.6 °C |
| Year | 4.84 avg | 2.92 avg | 867 kWh | 1422 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 820 Wp of panels at 70°, versus 440 Wp at 11°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Đức Phổ
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 11°
How Đức Phổ compares in Vietnam
Against the other 306 places in Vietnam with climate data, for a fixed array at its best angle.
137thof 307 places in Vietnam for sunshine: 4.84 peak sun hours a day on flat ground.
+8%solar energy a year compared with the average place in Vietnam: 1,422 against 1,320 kWh per kWp.
+15 mindaylight on the longest day, compared with Ho Chi Minh City: 13 h 00 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); Đức Phổ ranks 137th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.43 kWh a day here, against 1.53 kWh on average in Vietnam. The shortest day lasts 11 h 15 min, −15 min compared with Ho Chi Minh City.
Solar forecast for Đức Phổ, 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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Questions about the sun in Đức Phổ
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Places near Đức Phổ
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A free, live card for Đức Phổ: 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.