Bicol Region · Philippines · 12.67° N · 123.88° E
Solar position in Bulan
Sun position, daylight and the best solar panel angle for Bulan — computed for 12.67° N, 123.88° E, 5 m above sea level.
The sun right now
Sun in Bulan today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:24 | sun 18° below horizon |
| Nautical dawn | 04:49 | 12° below |
| Civil dawn | 05:14 | 6° below |
| Sunrise | 05:36 | 102° ESE |
| Golden hour ends | 06:04 | sun 6° up |
| Solar noon | 11:28 | 65.3° high |
| Golden hour starts | 16:52 | sun 6° up |
| Sunset | 17:20 | 258° WSW |
| Civil dusk | 17:42 | 6° below |
| Nautical dusk | 18:07 | 12° below |
| Astronomical dusk | 18:32 | 18° below |
| Day length | 11 h 45 min | |
Sun path diagram for Bulan
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 79.2° at solar noon in Bulan; on the December solstice only 53.9°. Sunrise swings from 66° ENE in June to 114° ESE in December — a 48° 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 | 11:55 | 17:40 | 11 h 30 min | 57.4° |
| February | 06:04 | 11:58 | 17:52 | 11 h 48 min | 66.8° |
| March | 05:48 | 11:51 | 17:55 | 12 h 07 min | 77.5° |
| April | 05:29 | 11:43 | 17:57 | 12 h 28 min | 89.2° |
| May | 05:18 | 11:41 | 18:03 | 12 h 45 min | 82.5° |
| June | 05:20 | 11:46 | 18:12 | 12 h 52 min | 79.2° |
| July | 05:27 | 11:50 | 18:13 | 12 h 46 min | 82.2° |
| August | 05:33 | 11:47 | 18:02 | 12 h 29 min | 89.5° |
| September | 05:33 | 11:37 | 17:41 | 12 h 08 min | 78.1° |
| October | 05:35 | 11:29 | 17:22 | 11 h 47 min | 66.7° |
| November | 05:45 | 11:30 | 17:15 | 11 h 30 min | 57.4° |
| December | 06:00 | 11:42 | 17:23 | 11 h 23 min | 53.9° |
A year of daylight in Bulan
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 Bulan
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
11°collects the most energy over a year: 1453 kWh per kWp.
21°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° | 1433 | 99% | 2.96 | 1.7× |
| 11° year-round best | 1453 | 100% | 3.27 | 1.5× |
| 13° = latitude | 1452 | 100% | 3.31 | 1.5× |
| 15° | 1449 | 100% | 3.36 | 1.4× |
| 21° off-grid best | 1433 | 99% | 3.46 | 1.4× |
| 30° | 1386 | 95% | 3.56 | 1.4× |
| 45° | 1247 | 86% | 3.56 | 1.6× |
| 60° | 1044 | 72% | 3.36 | 2.0× |
| 70° | 884 | 61% | 3.12 | 2.5× |
| 90° | 595 | 41% | 2.42 | 2.5× |
A fixed array in Bulan produces the most over a year at 11°. The design month for an off-grid system is December: at 21° it makes 3.46 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 Bulan 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 | 3.96 | 3.85 | 3.14 | 3.41 | 25.9 °C |
| February | 4.86 | 4.04 | 3.30 | 4.11 | 25.9 °C |
| March | 5.60 | 3.61 | 2.93 | 4.57 | 26.6 °C |
| April | 6.29 | 2.73 | 2.19 | 4.90 | 27.7 °C |
| May | 5.96 | 1.92 | 1.51 | 4.49 | 28.6 °C |
| June | 5.42 | 1.69 | 1.32 | 4.04 | 28.3 °C |
| July | 4.93 | 1.82 | 1.43 | 3.72 | 27.8 °C |
| August | 5.00 | 2.25 | 1.79 | 3.85 | 27.7 °C |
| September | 4.96 | 2.90 | 2.33 | 3.94 | 27.7 °C |
| October | 4.63 | 3.48 | 2.81 | 3.81 | 27.6 °C |
| November | 4.29 | 4.02 | 3.26 | 3.67 | 27.3 °C |
| December | 3.77 | 3.84 | 3.12 | 3.27 | 26.7 °C |
| Year | 4.97 avg | 3.01 avg | 884 kWh | 1453 kWh |
Sizing example. To run a 1 kWh-per-day load through June on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 890 Wp of panels at 70°, versus 360 Wp at 11°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Bulan
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.
2.2 mrow pitch at 70°
2.3 mrow pitch at 11°
How Bulan compares in the Philippines
Against the other 519 places in the Philippines with climate data, for a fixed array at its best angle.
284thof 520 places in the Philippines for sunshine, shared: 4.97 peak sun hours a day on flat ground.
−1%solar energy a year compared with the average place in the Philippines: 1,453 against 1,467 kWh per kWp.
−7 mindaylight on the longest day, compared with Quezon City: 12 h 52 min against 13 h 00 min.
11°best year-round tilt here; across the Philippines it runs from 4° in Bongao to 18° in Vigan.
Of the 520 places in the Philippines, Jolo gets the most sun (5.36 peak sun hours a day) and Pangil the least (4.68); Bulan ranks joint 284th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.32 kWh a day here, against 1.34 kWh on average in the Philippines. The shortest day lasts 11 h 23 min, +7 min compared with Quezon City.
Solar forecast for Bulan, 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 Bulan
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Places near Bulan
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A free, live card for Bulan: 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.