Bihar · India · 25.14° N · 85.21° E
Solar position in Islāmpur
Sun position, daylight and the best solar panel angle for Islāmpur — computed for 25.14° N, 85.21° E, 73 m above sea level.
The sun right now
Sun in Islāmpur today
Saturday, 24 October 2026 · local time UTC+5:30
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:35 | sun 18° below horizon |
| Nautical dawn | 05:01 | 12° below |
| Civil dawn | 05:28 | 6° below |
| Sunrise | 05:51 | 103° ESE |
| Golden hour ends | 06:23 | sun 6° up |
| Solar noon | 11:33 | 53.1° high |
| Golden hour starts | 16:43 | sun 6° up |
| Sunset | 17:14 | 257° WSW |
| Civil dusk | 17:37 | 6° below |
| Nautical dusk | 18:04 | 12° below |
| Astronomical dusk | 18:31 | 18° below |
| Day length | 11 h 23 min | |
Sun path diagram for Islāmpur
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 88.3° at solar noon in Islāmpur; on the December solstice only 41.4°. Sunrise swings from 63° 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 | 06:35 | 12:00 | 17:25 | 10 h 50 min | 45.0° |
| February | 06:19 | 12:02 | 17:46 | 11 h 27 min | 54.3° |
| March | 05:52 | 11:56 | 18:00 | 12 h 08 min | 65.1° |
| April | 05:21 | 11:47 | 18:14 | 12 h 53 min | 76.7° |
| May | 05:02 | 11:45 | 18:29 | 13 h 28 min | 85.1° |
| June | 04:59 | 11:50 | 18:42 | 13 h 42 min | 88.3° |
| July | 05:11 | 11:55 | 18:39 | 13 h 29 min | 85.3° |
| August | 05:25 | 11:52 | 18:19 | 12 h 54 min | 76.9° |
| September | 05:37 | 11:42 | 17:47 | 12 h 10 min | 65.5° |
| October | 05:50 | 11:33 | 17:17 | 11 h 27 min | 54.2° |
| November | 06:10 | 11:34 | 16:59 | 10 h 50 min | 45.0° |
| December | 06:29 | 11:47 | 17:04 | 10 h 34 min | 41.4° |
A year of daylight in Islāmpur
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 Islāmpur
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
24°collects the most energy over a year: 1489 kWh per kWp.
22°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° | 1384 | 93% | 3.56 | 1.9× |
| 15° | 1474 | 99% | 3.47 | 1.6× |
| 22° off-grid best | 1488 | 100% | 3.37 | 1.5× |
| 24° year-round best | 1489 | 100% | 3.34 | 1.5× |
| 25° = latitude | 1489 | 100% | 3.32 | 1.5× |
| 30° | 1482 | 100% | 3.21 | 1.6× |
| 45° | 1408 | 95% | 2.80 | 1.7× |
| 60° | 1257 | 84% | 2.27 | 1.9× |
| 70° | 1119 | 75% | 1.87 | 2.2× |
| 90° | 790 | 53% | 1.14 | 2.9× |
A fixed array in Islāmpur produces the most over a year at 24°. The design month for an off-grid system is July: at 22° it makes 3.37 kWh per kWp a day, 1% more than at 24°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Islāmpur at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 24° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 24° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.35 | 4.10 | 3.49 | 3.49 | 15.6 °C |
| February | 4.56 | 4.86 | 4.07 | 4.46 | 19.9 °C |
| March | 5.73 | 4.78 | 3.91 | 5.04 | 25.9 °C |
| April | 6.45 | 3.88 | 3.08 | 5.02 | 31.8 °C |
| May | 6.41 | 3.03 | 2.37 | 4.61 | 34.4 °C |
| June | 5.51 | 2.55 | 1.98 | 3.89 | 33.8 °C |
| July | 4.57 | 2.37 | 1.87 | 3.34 | 29.8 °C |
| August | 4.78 | 2.81 | 2.24 | 3.65 | 28.7 °C |
| September | 4.65 | 3.38 | 2.73 | 3.81 | 27.6 °C |
| October | 4.58 | 4.37 | 3.58 | 4.20 | 25.1 °C |
| November | 3.97 | 4.82 | 4.02 | 4.08 | 20.6 °C |
| December | 3.21 | 4.18 | 3.55 | 3.43 | 16.4 °C |
| Year | 4.81 avg | 3.75 avg | 1119 kWh | 1489 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 630 Wp of panels at 70°, versus 350 Wp at 24°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Islāmpur
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°
2.9 mrow pitch at 24°
How Islāmpur compares in India
Against the other 3,734 places in India with climate data, for a fixed array at its best angle.
3149thof 3,735 places in India for sunshine, shared: 4.81 peak sun hours a day on flat ground.
−5%solar energy a year compared with the average place in India: 1,489 against 1,575 kWh per kWp.
+25 mindaylight on the longest day, compared with Mumbai: 13 h 42 min against 13 h 17 min.
24°best year-round tilt here; across India it runs from 8° in Tirunelveli to 33° in Leh.
Of the 3,735 places in India, Balotra gets the most sun (5.73 peak sun hours a day) and Jining the least (3.68); Islāmpur ranks joint 3149th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 1.87 kWh a day here, against 1.70 kWh on average in India. The shortest day lasts 10 h 34 min, −25 min compared with Mumbai.
Solar forecast for Islāmpur, 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 Islāmpur: 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.