Bihar · India · 26.80° N · 84.50° E
Solar position in Bettiah
Sun position, daylight and the best solar panel angle for Bettiah — computed for 26.80° N, 84.50° E, 84 m above sea level.
The sun right now
Sun in Bettiah today
Saturday, 24 October 2026 · local time UTC+5:30
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:38 | sun 18° below horizon |
| Nautical dawn | 05:05 | 12° below |
| Civil dawn | 05:32 | 6° below |
| Sunrise | 05:56 | 103° ESE |
| Golden hour ends | 06:28 | sun 6° up |
| Solar noon | 11:36 | 51.4° high |
| Golden hour starts | 16:44 | sun 6° up |
| Sunset | 17:15 | 257° WSW |
| Civil dusk | 17:39 | 6° below |
| Nautical dusk | 18:06 | 12° below |
| Astronomical dusk | 18:33 | 18° below |
| Day length | 11 h 19 min | |
Sun path diagram for Bettiah
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 Bettiah; on the December solstice only 39.8°. 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 | 06:41 | 12:03 | 17:25 | 10 h 44 min | 43.3° |
| February | 06:23 | 12:05 | 17:47 | 11 h 24 min | 52.7° |
| March | 05:55 | 11:59 | 18:03 | 12 h 08 min | 63.5° |
| April | 05:22 | 11:50 | 18:19 | 12 h 56 min | 75.1° |
| May | 05:01 | 11:48 | 18:35 | 13 h 34 min | 83.4° |
| June | 04:58 | 11:53 | 18:48 | 13 h 50 min | 86.6° |
| July | 05:10 | 11:58 | 18:45 | 13 h 35 min | 83.7° |
| August | 05:26 | 11:55 | 18:23 | 12 h 57 min | 75.3° |
| September | 05:39 | 11:45 | 17:49 | 12 h 10 min | 63.9° |
| October | 05:54 | 11:36 | 17:18 | 11 h 24 min | 52.5° |
| November | 06:15 | 11:37 | 16:59 | 10 h 44 min | 43.3° |
| December | 06:36 | 11:49 | 17:03 | 10 h 27 min | 39.8° |
A year of daylight in Bettiah
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 Bettiah
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
25°collects the most energy over a year: 1484 kWh per kWp.
27°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 | January kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1368 | 92% | 2.50 | 2.1× |
| 15° | 1465 | 99% | 3.01 | 1.7× |
| 25° year-round best | 1484 | 100% | 3.25 | 1.6× |
| 27° off-grid best = latitude | 1483 | 100% | 3.29 | 1.6× |
| 30° | 1480 | 100% | 3.34 | 1.6× |
| 45° | 1412 | 95% | 3.48 | 1.8× |
| 60° | 1267 | 85% | 3.42 | 2.0× |
| 70° | 1133 | 76% | 3.27 | 2.1× |
| 90° | 805 | 54% | 2.72 | 2.9× |
A fixed array in Bettiah produces the most over a year at 25°. The design month for an off-grid system is January: at 27° it makes 3.29 kWh per kWp a day, 1% more than at 25°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Bettiah at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 25° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 25° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.08 | 3.83 | 3.27 | 3.25 | 15.0 °C |
| February | 4.43 | 4.84 | 4.07 | 4.40 | 19.0 °C |
| March | 5.74 | 4.95 | 4.06 | 5.12 | 24.7 °C |
| April | 6.44 | 4.03 | 3.22 | 5.07 | 30.3 °C |
| May | 6.37 | 3.15 | 2.48 | 4.63 | 32.5 °C |
| June | 5.53 | 2.63 | 2.06 | 3.93 | 32.5 °C |
| July | 4.58 | 2.41 | 1.90 | 3.35 | 29.3 °C |
| August | 4.81 | 2.88 | 2.31 | 3.69 | 28.4 °C |
| September | 4.58 | 3.42 | 2.77 | 3.79 | 27.1 °C |
| October | 4.57 | 4.52 | 3.72 | 4.28 | 24.6 °C |
| November | 3.84 | 4.82 | 4.03 | 4.03 | 20.3 °C |
| December | 3.01 | 4.04 | 3.44 | 3.28 | 16.1 °C |
| Year | 4.75 avg | 3.79 avg | 1133 kWh | 1484 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 620 Wp of panels at 70°, versus 360 Wp at 25°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Bettiah
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°
3.0 mrow pitch at 25°
How Bettiah compares in India
Against the other 3,734 places in India with climate data, for a fixed array at its best angle.
3332ndof 3,735 places in India for sunshine, shared: 4.75 peak sun hours a day on flat ground.
−6%solar energy a year compared with the average place in India: 1,484 against 1,575 kWh per kWp.
+33 mindaylight on the longest day, compared with Mumbai: 13 h 50 min against 13 h 17 min.
25°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); Bettiah ranks joint 3332nd. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 1.90 kWh a day here, against 1.70 kWh on average in India. The shortest day lasts 10 h 27 min, −32 min compared with Mumbai.
Solar forecast for Bettiah, 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 Bettiah
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A free, live card for Bettiah: 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.