Central Sulawesi · Indonesia · 2.55° S · 121.97° E
Solar position in Bungku
Sun position, daylight and the best solar panel angle for Bungku — computed for 2.55° S, 121.97° E, 6 m above sea level.
The sun right now
Sun in Bungku today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:20 | sun 18° below horizon |
| Nautical dawn | 04:44 | 12° below |
| Civil dawn | 05:09 | 6° below |
| Sunrise | 05:30 | 102° ESE |
| Golden hour ends | 05:58 | sun 6° up |
| Solar noon | 11:36 | 80.5° high |
| Golden hour starts | 17:13 | sun 6° up |
| Sunset | 17:41 | 258° WSW |
| Civil dusk | 18:02 | 6° below |
| Nautical dusk | 18:27 | 12° below |
| Astronomical dusk | 18:52 | 18° below |
| Day length | 12 h 11 min | |
Sun path diagram for Bungku
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 64.0° at solar noon in Bungku; on the December solstice only 69.1°. Sunrise swings from 67° ENE in June to 114° ESE in December — a 47° 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 | 05:55 | 12:03 | 18:10 | 12 h 15 min | 72.6° |
| February | 06:00 | 12:05 | 18:10 | 12 h 11 min | 82.0° |
| March | 05:56 | 11:59 | 18:02 | 12 h 06 min | 87.2° |
| April | 05:49 | 11:50 | 17:52 | 12 h 02 min | 75.6° |
| May | 05:48 | 11:48 | 17:48 | 12 h 00 min | 67.3° |
| June | 05:54 | 11:53 | 17:53 | 11 h 59 min | 64.0° |
| July | 05:58 | 11:58 | 17:58 | 12 h 00 min | 67.0° |
| August | 05:54 | 11:55 | 17:56 | 12 h 02 min | 75.3° |
| September | 05:42 | 11:45 | 17:48 | 12 h 06 min | 86.7° |
| October | 05:31 | 11:36 | 17:42 | 12 h 11 min | 81.9° |
| November | 05:30 | 11:37 | 17:45 | 12 h 15 min | 72.7° |
| December | 05:41 | 11:50 | 17:58 | 12 h 16 min | 69.1° |
A year of daylight in Bungku
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 Bungku
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
2°collects the most energy over a year: 1441 kWh per kWp.
22°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 | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1441 | 100% | 3.04 | 1.5× |
| 2° year-round best | 1441 | 100% | 3.08 | 1.5× |
| 3° = latitude | 1441 | 100% | 3.10 | 1.5× |
| 15° | 1410 | 98% | 3.27 | 1.4× |
| 22° off-grid best | 1369 | 95% | 3.32 | 1.3× |
| 30° | 1303 | 90% | 3.32 | 1.4× |
| 45° | 1128 | 78% | 3.20 | 1.7× |
| 60° | 901 | 62% | 2.91 | 2.1× |
| 70° | 747 | 52% | 2.62 | 2.4× |
| 90° | 505 | 35% | 1.89 | 1.9× |
A fixed array in Bungku produces the most over a year at 2°. The design month for an off-grid system is June: at 22° it makes 3.32 kWh per kWp a day, 8% more than at 2°, and costs 5% of the yearly total. Why steep panels win winter.
Off-grid solar in Bungku at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 2° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 2° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.11 | 1.63 | 1.28 | 4.01 | 26.5 °C |
| February | 5.18 | 1.87 | 1.48 | 4.09 | 26.5 °C |
| March | 5.30 | 2.54 | 2.04 | 4.21 | 26.4 °C |
| April | 4.95 | 3.19 | 2.59 | 3.95 | 26.4 °C |
| May | 4.30 | 3.35 | 2.72 | 3.44 | 26.4 °C |
| June | 3.84 | 3.23 | 2.62 | 3.08 | 25.7 °C |
| July | 4.01 | 3.28 | 2.67 | 3.22 | 25.2 °C |
| August | 4.66 | 3.31 | 2.70 | 3.76 | 25.0 °C |
| September | 5.63 | 2.97 | 2.41 | 4.51 | 25.5 °C |
| October | 5.90 | 2.03 | 1.62 | 4.68 | 26.3 °C |
| November | 5.66 | 1.47 | 1.14 | 4.44 | 26.8 °C |
| December | 5.12 | 1.56 | 1.23 | 4.01 | 26.7 °C |
| Year | 4.97 avg | 2.54 avg | 747 kWh | 1441 kWh |
Sizing example. To run a 1 kWh-per-day load through November on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 1,030 Wp of panels at 70°, versus 380 Wp at 2°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Bungku
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.
1.7 mrow pitch at 70°
2.0 mrow pitch at 2°
How Bungku compares in Indonesia
Against the other 446 places in Indonesia with climate data, for a fixed array at its best angle.
302ndof 447 places in Indonesia for sunshine, shared: 4.97 peak sun hours a day on flat ground.
−4%solar energy a year compared with the average place in Indonesia: 1,441 against 1,498 kWh per kWp.
−13 mindaylight on the longest day, compared with Jakarta: 12 h 16 min against 12 h 29 min.
2°best year-round tilt here; across Indonesia it runs from 0° in Batam to 12° in Kupang.
Of the 447 places in Indonesia, Lewoleba gets the most sun (5.95 peak sun hours a day) and Kuala Tungkal the least (4.48); Bungku ranks joint 302nd. In its darkest month, November, 1 kWp of off-grid panels at 70° makes 1.15 kWh a day here, against 1.26 kWh on average in Indonesia. The shortest day lasts 11 h 59 min, +13 min compared with Jakarta.
Solar forecast for Bungku, 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 Bungku
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Places near Bungku
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A free, live card for Bungku: 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.