Chukha · Bhutan · 26.85° N · 89.39° E
Solar position in Phuntsholing
Sun position, daylight and the best solar panel angle for Phuntsholing — computed for 26.85° N, 89.39° E, 330 m above sea level.
The sun right now
Sun in Phuntsholing today
Saturday, 24 October 2026 · local time UTC+6
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:49 | sun 18° below horizon |
| Nautical dawn | 05:16 | 12° below |
| Civil dawn | 05:43 | 6° below |
| Sunrise | 06:06 | 103° ESE |
| Golden hour ends | 06:38 | sun 6° up |
| Solar noon | 11:46 | 51.4° high |
| Golden hour starts | 16:54 | sun 6° up |
| Sunset | 17:26 | 257° WSW |
| Civil dusk | 17:49 | 6° below |
| Nautical dusk | 18:16 | 12° below |
| Astronomical dusk | 18:43 | 18° below |
| Day length | 11 h 19 min | |
Sun path diagram for Phuntsholing
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 86.6° at solar noon in Phuntsholing; on the December solstice only 39.7°. Sunrise swings from 63° ENE in June to 116° ESE in December — a 53° 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 | 06:51 | 12:13 | 17:35 | 10 h 44 min | 43.3° |
| February | 06:34 | 12:16 | 17:58 | 11 h 24 min | 52.6° |
| March | 06:05 | 12:09 | 18:14 | 12 h 08 min | 63.4° |
| April | 05:33 | 12:01 | 18:29 | 12 h 56 min | 75.0° |
| May | 05:12 | 11:59 | 18:46 | 13 h 34 min | 83.3° |
| June | 05:09 | 12:04 | 18:59 | 13 h 50 min | 86.6° |
| July | 05:21 | 12:08 | 18:56 | 13 h 35 min | 83.6° |
| August | 05:36 | 12:05 | 18:34 | 12 h 57 min | 75.2° |
| September | 05:50 | 11:55 | 18:00 | 12 h 10 min | 63.8° |
| October | 06:05 | 11:46 | 17:28 | 11 h 24 min | 52.5° |
| November | 06:26 | 11:48 | 17:09 | 10 h 44 min | 43.2° |
| December | 06:46 | 12:00 | 17:13 | 10 h 27 min | 39.7° |
A year of daylight in Phuntsholing
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 Phuntsholing
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
29°collects the most energy over a year: 1418 kWh per kWp.
7°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° | 1274 | 90% | 3.27 | 1.4× |
| 7° off-grid best | 1334 | 94% | 3.26 | 1.3× |
| 15° | 1384 | 98% | 3.20 | 1.4× |
| 27° = latitude | 1417 | 100% | 3.04 | 1.5× |
| 29° year-round best | 1418 | 100% | 3.01 | 1.5× |
| 30° | 1418 | 100% | 2.99 | 1.6× |
| 45° | 1374 | 97% | 2.64 | 1.8× |
| 60° | 1257 | 89% | 2.18 | 2.2× |
| 70° | 1141 | 80% | 1.83 | 2.5× |
| 90° | 845 | 60% | 1.16 | 3.4× |
A fixed array in Phuntsholing produces the most over a year at 29°. The design month for an off-grid system is July: at 7° it makes 3.26 kWh per kWp a day, 8% more than at 29°, and costs 6% of the yearly total. Why steep panels win winter.
Off-grid solar in Phuntsholing at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 29° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 29° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.51 | 4.64 | 4.07 | 4.05 | 8.2 °C |
| February | 4.15 | 4.43 | 3.85 | 4.27 | 10.6 °C |
| March | 4.86 | 4.09 | 3.49 | 4.44 | 14.4 °C |
| April | 5.01 | 3.25 | 2.72 | 4.07 | 17.9 °C |
| May | 4.89 | 2.67 | 2.20 | 3.69 | 19.9 °C |
| June | 4.34 | 2.30 | 1.87 | 3.17 | 21.3 °C |
| July | 4.06 | 2.25 | 1.83 | 3.01 | 21.2 °C |
| August | 4.39 | 2.71 | 2.23 | 3.40 | 21.0 °C |
| September | 4.01 | 2.99 | 2.48 | 3.36 | 19.8 °C |
| October | 4.38 | 4.33 | 3.67 | 4.27 | 16.8 °C |
| November | 4.05 | 5.36 | 4.61 | 4.62 | 13.1 °C |
| December | 3.54 | 5.22 | 4.55 | 4.31 | 9.8 °C |
| Year | 4.27 avg | 3.68 avg | 1141 kWh | 1418 kWh |
Sizing example. To run a 1 kWh-per-day load through July on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 640 Wp of panels at 70°, versus 390 Wp at 29°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Phuntsholing
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.
3.2 mrow pitch at 70°
3.1 mrow pitch at 29°
How Phuntsholing compares in Bhutan
Against the other 3 places in Bhutan with climate data, for a fixed array at its best angle.
2ndof 4 places in Bhutan for sunshine: 4.27 peak sun hours a day on flat ground.
−3%solar energy a year compared with the average place in Bhutan: 1,418 against 1,461 kWh per kWp.
−3 mindaylight on the longest day, compared with Thimphu: 13 h 50 min against 13 h 53 min.
29°best year-round tilt here; across Bhutan it runs from 29° in Phuntsholing to 32° in Punākha.
Of the 4 places in Bhutan, Punākha gets the most sun (4.32 peak sun hours a day) and Tsirang the least (4.24); Phuntsholing ranks 2nd. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 1.83 kWh a day here, against 1.94 kWh on average in Bhutan. The shortest day lasts 10 h 27 min, +3 min compared with Thimphu.
Solar forecast for Phuntsholing, 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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Places near Phuntsholing
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A free, live card for Phuntsholing: 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.