Solarposition.org

West Nusa Tenggara · Indonesia · 8.49° S · 117.42° E

Solar position in Sumbawa Besar

Sun position, daylight and the best solar panel angle for Sumbawa Besar — computed for 8.49° S, 117.42° E, 14 m above sea level.

Sunrise today05:43102° ESE
Sunset today18:05258° WSW
Best panel angle11°year-round, facing north
Off-grid angle3°best for the darkest month

The sun right now

Azimuth180.0°
Elevation86.4°
At solar noon, 11:54Open on the sun map

Sun in Sumbawa Besar today

Sunday, 25 October 2026 · local time UTC+8

EventTimeDirection / height
Astronomical dawn04:32sun 18° below horizon
Nautical dawn04:5712° below
Civil dawn05:226° below
Sunrise05:43102° ESE
Golden hour ends06:11sun 6° up
Solar noon11:5486.4° high
Golden hour starts17:36sun 6° up
Sunset18:05258° WSW
Civil dusk18:266° below
Nautical dusk18:5112° below
Astronomical dusk19:1618° below
Day length12 h 21 min

Sun path diagram for Sumbawa Besar

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice7891011121314151617EquinoxDecember solstice6789101112131415161718Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 58.1° at solar noon in Sumbawa Besar; on the December solstice only 75.1°. 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January06:0512:2118:3712 h 32 min78.6°
February06:1412:2318:3312 h 20 min87.9°
March06:1412:1718:2012 h 06 min81.3°
April06:1212:0818:0511 h 52 min69.7°
May06:1512:0617:5711 h 42 min61.3°
June06:2312:1218:0011 h 38 min58.1°
July06:2512:1618:0711 h 42 min61.0°
August06:1712:1318:0911 h 52 min69.4°
September06:0012:0318:0612 h 06 min80.8°
October05:4511:5418:0412 h 20 min87.8°
November05:4011:5618:1212 h 32 min78.6°
December05:4912:0818:2612 h 37 min75.1°

A year of daylight in Sumbawa Besar

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Sumbawa Besar

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: 1651 kWh per kWp.

3°gives the most in the darkest month — the one an off-grid system is sized for.

20%30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 11°Best worst-month 3°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJanuary kWh/kWp/dayBest ÷ worst month
0°162598%4.141.3×
3° off-grid best163799%4.101.3×
8° = latitude1649100%3.991.3×
11° year-round best1651100%3.921.3×
15°1647100%3.811.4×
30°157695%3.291.6×
45°141586%2.601.9×
60°117971%1.822.6×
70°99560%1.353.2×
90°66440%1.113.2×

A fixed array in Sumbawa Besar produces the most over a year at 11°. The design month for an off-grid system is January: at 3° it makes 4.10 kWh per kWp a day, 4% more than at 11°, and costs 1% of the yearly total. Why steep panels win winter.

Off-grid solar in Sumbawa Besar at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 11° (year-round best).

0123456January: 1.35 (70°)1.3JanFebruary: 1.71 (70°)1.7FebMarch: 2.37 (70°)2.4MarApril: 3.25 (70°)3.3AprMay: 3.92 (70°)3.9MayJune: 4.16 (70°)4.2JunJuly: 4.12 (70°)4.1JulAugust: 3.87 (70°)3.9AugSeptember: 3.11 (70°)3.1SepOctober: 2.09 (70°)2.1OctNovember: 1.39 (70°)1.4NovDecember: 1.29 (70°)1.3Dec11°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 11°Mean temp.
January5.221.711.353.9226.2 °C
February5.332.141.714.1126.1 °C
March5.492.942.374.3726.3 °C
April5.534.003.254.5826.4 °C
May5.274.793.924.5425.9 °C
June5.005.074.164.4025.3 °C
July5.155.024.124.5125.0 °C
August5.794.723.874.9225.4 °C
September6.443.833.115.2126.8 °C
October6.642.612.095.1228.2 °C
November6.191.781.394.6228.2 °C
December5.291.641.293.9426.9 °C
Year5.61 avg3.36 avg995 kWh1651 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 920 Wp of panels at 70°, versus 300 Wp at 11°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Sumbawa Besar

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°

Row spacing calculator

How Sumbawa Besar compares in Indonesia

Against the other 446 places in Indonesia with climate data, for a fixed array at its best angle.

22ndof 447 places in Indonesia for sunshine, shared: 5.61 peak sun hours a day on flat ground.

+10%solar energy a year compared with the average place in Indonesia: 1,651 against 1,498 kWh per kWp.

+8 mindaylight on the longest day, compared with Jakarta: 12 h 37 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); Sumbawa Besar ranks joint 22nd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.29 kWh a day here, against 1.26 kWh on average in Indonesia. The shortest day lasts 11 h 38 min, −8 min compared with Jakarta.

The sunniest places in Indonesia

Solar forecast for Sumbawa Besar, next 48 hours

Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.

Loading the latest forecast…

Questions about the sun in Sumbawa Besar

What is the best solar panel angle in Sumbawa Besar?
For a fixed array facing north, the best year-round tilt in Sumbawa Besar is 11°, worth about 1651 kWh per kWp a year. An off-grid system that has to get through January does better at about 3°.
What time is sunrise and sunset in Sumbawa Besar today?
On 25 October 2026 the sun rises at 05:43 and sets at 18:05 local time (UTC+8), giving 12 h 21 min of daylight. Solar noon is at 11:54.
How many peak sun hours does Sumbawa Besar get?
On a flat surface 5.6 hours a day averaged over the year, from 5.0 in June to 6.6 in October. Panels tilted at 70° receive 1.6 sun hours a day in December.
How high does the sun get in Sumbawa Besar?
At solar noon the sun stands 58.1° above the horizon on the June solstice and 75.1° on the December solstice.
Is Sumbawa Besar a good place for solar panels?
With 5.6 peak sun hours a day on flat ground, Sumbawa Besar ranks joint 22nd of 447 places in Indonesia for sunshine. A 1 kWp array at the best angle (11°) makes about 1,651 kWh a year here, 10% more than the average place in Indonesia.

Places near Sumbawa Besar

All places in Indonesia

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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.