East Java · Indonesia · 7.58° S · 112.23° E
Solar position in Diwek
Sun position, daylight and the best solar panel angle for Diwek — computed for 7.58° S, 112.23° E, 53 m above sea level.
The sun right now
Sun in Diwek today
Sunday, 25 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 03:54 | sun 18° below horizon |
| Nautical dawn | 04:19 | 12° below |
| Civil dawn | 04:43 | 6° below |
| Sunrise | 05:05 | 102° ESE |
| Golden hour ends | 05:33 | sun 6° up |
| Solar noon | 11:15 | 85.5° high |
| Golden hour starts | 16:56 | sun 6° up |
| Sunset | 17:25 | 258° WSW |
| Civil dusk | 17:46 | 6° below |
| Nautical dusk | 18:11 | 12° below |
| Astronomical dusk | 18:36 | 18° below |
| Day length | 12 h 20 min | |
Sun path diagram for Diwek
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 59.0° at solar noon in Diwek; on the December solstice only 74.1°. 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 | 05:27 | 11:42 | 17:56 | 12 h 29 min | 77.7° |
| February | 05:35 | 11:44 | 17:53 | 12 h 18 min | 87.0° |
| March | 05:35 | 11:38 | 17:41 | 12 h 06 min | 82.2° |
| April | 05:32 | 11:29 | 17:26 | 11 h 54 min | 70.6° |
| May | 05:35 | 11:27 | 17:19 | 11 h 45 min | 62.2° |
| June | 05:42 | 11:32 | 17:23 | 11 h 41 min | 59.0° |
| July | 05:45 | 11:37 | 17:29 | 11 h 44 min | 62.0° |
| August | 05:37 | 11:34 | 17:31 | 11 h 54 min | 70.3° |
| September | 05:21 | 11:24 | 17:27 | 12 h 06 min | 81.7° |
| October | 05:06 | 11:15 | 17:24 | 12 h 18 min | 86.9° |
| November | 05:02 | 11:16 | 17:31 | 12 h 29 min | 77.7° |
| December | 05:11 | 11:28 | 17:46 | 12 h 34 min | 74.1° |
A year of daylight in Diwek
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 Diwek
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: 1558 kWh per kWp.
1°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° | 1536 | 99% | 3.89 | 1.3× |
| 1° off-grid best | 1540 | 99% | 3.88 | 1.3× |
| 8° = latitude | 1557 | 100% | 3.74 | 1.3× |
| 11° year-round best | 1558 | 100% | 3.67 | 1.4× |
| 15° | 1554 | 100% | 3.57 | 1.4× |
| 30° | 1486 | 95% | 3.07 | 1.6× |
| 45° | 1337 | 86% | 2.43 | 1.9× |
| 60° | 1118 | 72% | 1.72 | 2.5× |
| 70° | 947 | 61% | 1.33 | 3.0× |
| 90° | 640 | 41% | 1.15 | 2.8× |
A fixed array in Diwek produces the most over a year at 11°. The design month for an off-grid system is December: at 1° it makes 3.88 kWh per kWp a day, 6% more than at 11°, and costs 1% of the yearly total. Why steep panels win winter.
Off-grid solar in Diwek 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 | 5.00 | 1.73 | 1.36 | 3.77 | 25.7 °C |
| February | 4.97 | 2.08 | 1.66 | 3.83 | 25.6 °C |
| March | 5.13 | 2.77 | 2.24 | 4.08 | 25.9 °C |
| April | 5.11 | 3.61 | 2.94 | 4.21 | 26.2 °C |
| May | 4.99 | 4.37 | 3.57 | 4.26 | 26.0 °C |
| June | 4.87 | 4.75 | 3.90 | 4.24 | 25.5 °C |
| July | 5.12 | 4.84 | 3.97 | 4.44 | 25.3 °C |
| August | 5.74 | 4.56 | 3.73 | 4.84 | 26.0 °C |
| September | 6.24 | 3.66 | 2.96 | 5.03 | 27.3 °C |
| October | 6.08 | 2.50 | 2.00 | 4.69 | 28.1 °C |
| November | 5.49 | 1.81 | 1.42 | 4.13 | 27.6 °C |
| December | 4.91 | 1.69 | 1.33 | 3.67 | 26.3 °C |
| Year | 5.30 avg | 3.20 avg | 947 kWh | 1558 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 Diwek
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 Diwek 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: 5.31 peak sun hours a day on flat ground.
+4%solar energy a year compared with the average place in Indonesia: 1,558 against 1,498 kWh per kWp.
+5 mindaylight on the longest day, compared with Jakarta: 12 h 34 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); Diwek ranks joint 127th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.33 kWh a day here, against 1.26 kWh on average in Indonesia. The shortest day lasts 11 h 41 min, −5 min compared with Jakarta.
Solar forecast for Diwek, 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 Diwek
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Places near Diwek
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A free, live card for Diwek: 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.