Sylhet Division · Bangladesh · 25.04° N · 91.67° E
Solar position in Chhātak
Sun position, daylight and the best solar panel angle for Chhātak — computed for 25.04° N, 91.67° E, 17 m above sea level.
The sun right now
Sun in Chhātak today
Sunday, 25 October 2026 · local time UTC+6
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:39 | sun 18° below horizon |
| Nautical dawn | 05:06 | 12° below |
| Civil dawn | 05:33 | 6° below |
| Sunrise | 05:56 | 103° ESE |
| Golden hour ends | 06:27 | sun 6° up |
| Solar noon | 11:37 | 52.9° high |
| Golden hour starts | 16:46 | sun 6° up |
| Sunset | 17:18 | 257° WSW |
| Civil dusk | 17:41 | 6° below |
| Nautical dusk | 18:08 | 12° below |
| Astronomical dusk | 18:34 | 18° below |
| Day length | 11 h 21 min | |
Sun path diagram for Chhātak
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 88.4° at solar noon in Chhātak; on the December solstice only 41.5°. Sunrise swings from 64° ENE in June to 116° ESE in December — a 52° 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 | 06:39 | 12:04 | 17:29 | 10 h 50 min | 45.1° |
| February | 06:23 | 12:07 | 17:50 | 11 h 28 min | 54.4° |
| March | 05:56 | 12:00 | 18:04 | 12 h 08 min | 65.2° |
| April | 05:25 | 11:52 | 18:18 | 12 h 53 min | 76.8° |
| May | 05:06 | 11:49 | 18:33 | 13 h 27 min | 85.2° |
| June | 05:04 | 11:55 | 18:45 | 13 h 42 min | 88.4° |
| July | 05:15 | 11:59 | 18:43 | 13 h 28 min | 85.4° |
| August | 05:29 | 11:56 | 18:23 | 12 h 53 min | 77.1° |
| September | 05:41 | 11:46 | 17:51 | 12 h 10 min | 65.7° |
| October | 05:54 | 11:37 | 17:21 | 11 h 27 min | 54.3° |
| November | 06:13 | 11:39 | 17:04 | 10 h 50 min | 45.1° |
| December | 06:33 | 11:51 | 17:08 | 10 h 35 min | 41.5° |
A year of daylight in Chhātak
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 Chhātak
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
28°collects the most energy over a year: 1436 kWh per kWp.
4°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 | June kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1298 | 90% | 3.30 | 1.4× |
| 4° off-grid best | 1334 | 93% | 3.29 | 1.3× |
| 15° | 1406 | 98% | 3.20 | 1.4× |
| 25° = latitude | 1434 | 100% | 3.06 | 1.5× |
| 28° year-round best | 1436 | 100% | 3.00 | 1.6× |
| 30° | 1436 | 100% | 2.96 | 1.6× |
| 45° | 1387 | 97% | 2.58 | 1.9× |
| 60° | 1263 | 88% | 2.09 | 2.3× |
| 70° | 1143 | 80% | 1.73 | 2.7× |
| 90° | 841 | 59% | 1.12 | 3.5× |
A fixed array in Chhātak produces the most over a year at 28°. The design month for an off-grid system is June: at 4° it makes 3.29 kWh per kWp a day, 10% more than at 28°, and costs 7% of the yearly total. Why steep panels win winter.
Off-grid solar in Chhātak at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 28° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 28° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.88 | 5.10 | 4.37 | 4.35 | 14.2 °C |
| February | 4.62 | 4.91 | 4.16 | 4.64 | 17.0 °C |
| March | 5.21 | 4.27 | 3.55 | 4.61 | 21.0 °C |
| April | 5.22 | 3.29 | 2.69 | 4.12 | 23.7 °C |
| May | 4.91 | 2.61 | 2.11 | 3.63 | 24.7 °C |
| June | 4.17 | 2.17 | 1.73 | 3.00 | 25.3 °C |
| July | 4.20 | 2.26 | 1.81 | 3.05 | 25.4 °C |
| August | 4.42 | 2.67 | 2.15 | 3.35 | 25.4 °C |
| September | 4.18 | 3.03 | 2.47 | 3.41 | 24.6 °C |
| October | 4.33 | 4.09 | 3.38 | 4.02 | 22.7 °C |
| November | 4.28 | 5.48 | 4.61 | 4.67 | 18.9 °C |
| December | 3.78 | 5.42 | 4.62 | 4.42 | 15.5 °C |
| Year | 4.43 avg | 3.77 avg | 1143 kWh | 1436 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 680 Wp of panels at 70°, versus 390 Wp at 28°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Chhātak
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.
3.1 mrow pitch at 70°
3.0 mrow pitch at 28°
How Chhātak compares in Bangladesh
Against the other 132 places in Bangladesh with climate data, for a fixed array at its best angle.
124thof 133 places in Bangladesh for sunshine, shared: 4.43 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Bangladesh: 1,436 against 1,428 kWh per kWp.
+6 mindaylight on the longest day, compared with Dhaka: 13 h 42 min against 13 h 36 min.
28°best year-round tilt here; across Bangladesh it runs from 23° in Taluker Char Doani to 28° in Sylhet.
Of the 133 places in Bangladesh, Hāthazāri and one other place get the most sun (4.91 peak sun hours a day) and Panchagarh the least (4.36); Chhātak ranks joint 124th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.73 kWh a day here, against 1.76 kWh on average in Bangladesh. The shortest day lasts 10 h 35 min, −6 min compared with Dhaka.
Solar forecast for Chhātak, 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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A free, live card for Chhātak: 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.