Morobe Province · Papua New Guinea · 7.20° S · 146.64° E
Solar position in Bulolo
Sun position, daylight and the best solar panel angle for Bulolo — computed for 7.20° S, 146.64° E, 677 m above sea level.
The sun right now
Sun in Bulolo today
Sunday, 25 October 2026 · local time UTC+10
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:36 | sun 18° below horizon |
| Nautical dawn | 05:01 | 12° below |
| Civil dawn | 05:26 | 6° below |
| Sunrise | 05:48 | 102° ESE |
| Golden hour ends | 06:16 | sun 6° up |
| Solar noon | 11:57 | 85.1° high |
| Golden hour starts | 17:39 | sun 6° up |
| Sunset | 18:07 | 258° WSW |
| Civil dusk | 18:28 | 6° below |
| Nautical dusk | 18:53 | 12° below |
| Astronomical dusk | 19:18 | 18° below |
| Day length | 12 h 19 min | |
Sun path diagram for Bulolo
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 59.4° at solar noon in Bulolo; on the December solstice only 73.8°. 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 | 06:10 | 12:24 | 18:38 | 12 h 28 min | 77.3° |
| February | 06:18 | 12:27 | 18:35 | 12 h 18 min | 86.6° |
| March | 06:17 | 12:20 | 18:23 | 12 h 06 min | 82.6° |
| April | 06:14 | 12:12 | 18:09 | 11 h 55 min | 71.0° |
| May | 06:17 | 12:09 | 18:02 | 11 h 46 min | 62.6° |
| June | 06:24 | 12:15 | 18:06 | 11 h 42 min | 59.4° |
| July | 06:27 | 12:19 | 18:12 | 11 h 46 min | 62.3° |
| August | 06:19 | 12:16 | 18:13 | 11 h 54 min | 70.7° |
| September | 06:03 | 12:06 | 18:09 | 12 h 06 min | 82.1° |
| October | 05:49 | 11:58 | 18:07 | 12 h 18 min | 86.6° |
| November | 05:45 | 11:59 | 18:13 | 12 h 28 min | 77.3° |
| December | 05:54 | 12:11 | 18:27 | 12 h 33 min | 73.8° |
A year of daylight in Bulolo
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 Bulolo
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
6°collects the most energy over a year: 1378 kWh per kWp.
26°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 | July kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1373 | 100% | 3.04 | 1.4× |
| 6° year-round best | 1378 | 100% | 3.16 | 1.3× |
| 7° = latitude | 1378 | 100% | 3.18 | 1.3× |
| 15° | 1365 | 99% | 3.30 | 1.2× |
| 26° off-grid best | 1314 | 95% | 3.38 | 1.2× |
| 30° | 1286 | 93% | 3.38 | 1.2× |
| 45° | 1140 | 83% | 3.28 | 1.4× |
| 60° | 942 | 68% | 3.01 | 1.9× |
| 70° | 795 | 58% | 2.74 | 2.3× |
| 90° | 552 | 40% | 2.02 | 2.0× |
A fixed array in Bulolo produces the most over a year at 6°. The design month for an off-grid system is July: at 26° it makes 3.38 kWh per kWp a day, 7% more than at 6°, and costs 5% of the yearly total. Why steep panels win winter.
Off-grid solar in Bulolo at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 6° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 6° | Mean temp. |
|---|---|---|---|---|---|
| January | 5.02 | 1.77 | 1.42 | 3.94 | 22.2 °C |
| February | 5.08 | 2.16 | 1.75 | 4.05 | 21.9 °C |
| March | 4.89 | 2.72 | 2.23 | 3.96 | 21.7 °C |
| April | 4.70 | 3.30 | 2.73 | 3.87 | 21.7 °C |
| May | 4.24 | 3.55 | 2.94 | 3.54 | 21.5 °C |
| June | 3.83 | 3.48 | 2.89 | 3.22 | 21.0 °C |
| July | 3.77 | 3.29 | 2.74 | 3.16 | 20.5 °C |
| August | 4.12 | 3.15 | 2.61 | 3.43 | 20.7 °C |
| September | 4.56 | 2.77 | 2.28 | 3.73 | 21.3 °C |
| October | 5.25 | 2.28 | 1.86 | 4.21 | 22.0 °C |
| November | 5.21 | 1.72 | 1.38 | 4.10 | 22.4 °C |
| December | 5.28 | 1.60 | 1.28 | 4.12 | 22.6 °C |
| Year | 4.66 avg | 2.65 avg | 795 kWh | 1378 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 370 Wp at 6°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Bulolo
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.
1.9 mrow pitch at 70°
2.1 mrow pitch at 6°
How Bulolo compares in Papua New Guinea
Against the other 12 places in Papua New Guinea with climate data, for a fixed array at its best angle.
11thof 13 places in Papua New Guinea for sunshine, shared: 4.66 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in Papua New Guinea: 1,378 against 1,414 kWh per kWp.
−8 mindaylight on the longest day, compared with Port Moresby: 12 h 33 min against 12 h 41 min.
6°best year-round tilt here; across Papua New Guinea it runs from 4° in Kokopo to 8° in Port Moresby.
Of the 13 places in Papua New Guinea, Port Moresby gets the most sun (5.24 peak sun hours a day) and Lae the least (4.59); Bulolo ranks joint 11th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.28 kWh a day here, against 1.22 kWh on average in Papua New Guinea. The shortest day lasts 11 h 42 min, +8 min compared with Port Moresby.
Solar forecast for Bulolo, 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 Bulolo
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Places near Bulolo
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A free, live card for Bulolo: 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.