Yogyakarta · Indonesia · 7.88° S · 110.36° E
Solar position in Sewon
Sun position, daylight and the best solar panel angle for Sewon — computed for 7.88° S, 110.36° E, 57 m above sea level.
The sun right now
Sun in Sewon today
Sunday, 25 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:01 | sun 18° below horizon |
| Nautical dawn | 04:26 | 12° below |
| Civil dawn | 04:51 | 6° below |
| Sunrise | 05:12 | 102° ESE |
| Golden hour ends | 05:40 | sun 6° up |
| Solar noon | 11:22 | 85.8° high |
| Golden hour starts | 17:04 | sun 6° up |
| Sunset | 17:32 | 258° WSW |
| Civil dusk | 17:54 | 6° below |
| Nautical dusk | 18:19 | 12° below |
| Astronomical dusk | 18:44 | 18° below |
| Day length | 12 h 20 min | |
Sun path diagram for Sewon
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 58.7° at solar noon in Sewon; on the December solstice only 74.4°. Sunrise swings from 66° 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 | 05:34 | 11:49 | 18:04 | 12 h 30 min | 78.0° |
| February | 05:42 | 11:52 | 18:01 | 12 h 19 min | 87.3° |
| March | 05:42 | 11:45 | 17:48 | 12 h 06 min | 81.9° |
| April | 05:40 | 11:37 | 17:33 | 11 h 53 min | 70.3° |
| May | 05:43 | 11:35 | 17:27 | 11 h 44 min | 61.9° |
| June | 05:50 | 11:40 | 17:30 | 11 h 40 min | 58.7° |
| July | 05:53 | 11:45 | 17:36 | 11 h 44 min | 61.7° |
| August | 05:45 | 11:41 | 17:38 | 11 h 53 min | 70.0° |
| September | 05:28 | 11:31 | 17:34 | 12 h 06 min | 81.4° |
| October | 05:13 | 11:23 | 17:32 | 12 h 19 min | 87.2° |
| November | 05:09 | 11:24 | 17:39 | 12 h 30 min | 78.0° |
| December | 05:18 | 11:36 | 17:54 | 12 h 35 min | 74.4° |
A year of daylight in Sewon
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 Sewon
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
11°collects the most energy over a year: 1560 kWh per kWp.
2°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° | 1538 | 99% | 3.93 | 1.3× |
| 2° off-grid best | 1546 | 99% | 3.90 | 1.3× |
| 8° = latitude | 1559 | 100% | 3.78 | 1.3× |
| 11° year-round best | 1560 | 100% | 3.71 | 1.3× |
| 15° | 1556 | 100% | 3.61 | 1.4× |
| 30° | 1489 | 95% | 3.10 | 1.6× |
| 45° | 1341 | 86% | 2.44 | 1.9× |
| 60° | 1123 | 72% | 1.72 | 2.5× |
| 70° | 953 | 61% | 1.32 | 3.0× |
| 90° | 645 | 41% | 1.14 | 2.7× |
A fixed array in Sewon produces the most over a year at 11°. The design month for an off-grid system is December: at 2° it makes 3.90 kWh per kWp a day, 5% more than at 11°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Sewon 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 | 5.05 | 1.70 | 1.34 | 3.79 | 26.3 °C |
| February | 5.02 | 2.07 | 1.65 | 3.87 | 26.3 °C |
| March | 5.18 | 2.80 | 2.25 | 4.11 | 26.5 °C |
| April | 5.23 | 3.71 | 3.02 | 4.30 | 26.8 °C |
| May | 5.07 | 4.45 | 3.63 | 4.31 | 26.5 °C |
| June | 4.87 | 4.75 | 3.89 | 4.23 | 25.7 °C |
| July | 5.11 | 4.83 | 3.97 | 4.44 | 24.9 °C |
| August | 5.74 | 4.58 | 3.76 | 4.87 | 24.8 °C |
| September | 6.10 | 3.62 | 2.95 | 4.96 | 25.5 °C |
| October | 5.90 | 2.52 | 2.02 | 4.60 | 26.3 °C |
| November | 5.40 | 1.83 | 1.45 | 4.08 | 26.5 °C |
| December | 4.97 | 1.68 | 1.32 | 3.71 | 26.3 °C |
| Year | 5.30 avg | 3.22 avg | 953 kWh | 1560 kWh |
Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 890 Wp of panels at 70°, versus 320 Wp at 11°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Sewon
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.
2.0 mrow pitch at 70°
2.2 mrow pitch at 11°
How Sewon compares in Indonesia
Against the other 446 places in Indonesia with climate data, for a fixed array at its best angle.
127thof 447 places in Indonesia for sunshine, shared: 5.30 peak sun hours a day on flat ground.
+4%solar energy a year compared with the average place in Indonesia: 1,560 against 1,498 kWh per kWp.
+6 mindaylight on the longest day, compared with Jakarta: 12 h 35 min against 12 h 29 min.
11°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); Sewon ranks joint 127th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.32 kWh a day here, against 1.26 kWh on average in Indonesia. The shortest day lasts 11 h 40 min, −6 min compared with Jakarta.
Solar forecast for Sewon, 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 Sewon
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Places near Sewon
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A free, live card for Sewon: 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.