Kalasin · Thailand · 16.65° N · 103.30° E
Solar position in Nong Kung Si
Sun position, daylight and the best solar panel angle for Nong Kung Si — computed for 16.65° N, 103.30° E, 183 m above sea level.
The sun right now
Sun in Nong Kung Si today
Sunday, 25 October 2026 · local time UTC+7
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:49 | sun 18° below horizon |
| Nautical dawn | 05:14 | 12° below |
| Civil dawn | 05:39 | 6° below |
| Sunrise | 06:01 | 102° ESE |
| Golden hour ends | 06:31 | sun 6° up |
| Solar noon | 11:50 | 61.3° high |
| Golden hour starts | 17:10 | sun 6° up |
| Sunset | 17:39 | 258° WSW |
| Civil dusk | 18:01 | 6° below |
| Nautical dusk | 18:27 | 12° below |
| Astronomical dusk | 18:52 | 18° below |
| Day length | 11 h 38 min | |
Sun path diagram for Nong Kung Si
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 83.2° at solar noon in Nong Kung Si; on the December solstice only 49.9°. Sunrise swings from 65° ENE in June to 114° ESE in December — a 49° 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 | 12:18 | 17:56 | 11 h 18 min | 53.5° |
| February | 06:29 | 12:20 | 18:11 | 11 h 41 min | 62.8° |
| March | 06:10 | 12:14 | 18:17 | 12 h 07 min | 73.6° |
| April | 05:47 | 12:05 | 18:23 | 12 h 36 min | 85.2° |
| May | 05:34 | 12:03 | 18:32 | 12 h 58 min | 86.5° |
| June | 05:34 | 12:08 | 18:42 | 13 h 07 min | 83.2° |
| July | 05:43 | 12:13 | 18:42 | 12 h 59 min | 86.2° |
| August | 05:51 | 12:10 | 18:28 | 12 h 36 min | 85.5° |
| September | 05:55 | 11:59 | 18:04 | 12 h 08 min | 74.1° |
| October | 06:00 | 11:51 | 17:41 | 11 h 41 min | 62.7° |
| November | 06:13 | 11:52 | 17:31 | 11 h 18 min | 53.5° |
| December | 06:30 | 12:04 | 17:38 | 11 h 08 min | 49.9° |
A year of daylight in Nong Kung Si
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 Nong Kung Si
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
19°collects the most energy over a year: 1531 kWh per kWp.
3°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 | August kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1465 | 96% | 3.71 | 1.2× |
| 3° off-grid best | 1485 | 97% | 3.71 | 1.2× |
| 15° | 1528 | 100% | 3.62 | 1.3× |
| 17° = latitude | 1531 | 100% | 3.60 | 1.3× |
| 19° year-round best | 1531 | 100% | 3.57 | 1.3× |
| 30° | 1508 | 98% | 3.36 | 1.5× |
| 45° | 1406 | 92% | 2.93 | 1.8× |
| 60° | 1229 | 80% | 2.37 | 2.3× |
| 70° | 1078 | 70% | 1.95 | 2.8× |
| 90° | 758 | 50% | 1.16 | 3.2× |
A fixed array in Nong Kung Si produces the most over a year at 19°. The design month for an off-grid system is August: at 3° it makes 3.71 kWh per kWp a day, 4% more than at 19°, and costs 3% of the yearly total. Why steep panels win winter.
Off-grid solar in Nong Kung Si at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 19° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 19° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.87 | 5.47 | 4.52 | 4.69 | 22.9 °C |
| February | 5.23 | 4.71 | 3.84 | 4.63 | 26.1 °C |
| March | 5.32 | 3.74 | 3.01 | 4.34 | 29.0 °C |
| April | 5.81 | 3.02 | 2.40 | 4.43 | 30.7 °C |
| May | 5.60 | 2.35 | 1.86 | 4.10 | 29.1 °C |
| June | 5.25 | 2.11 | 1.67 | 3.81 | 27.5 °C |
| July | 4.89 | 2.12 | 1.68 | 3.60 | 26.8 °C |
| August | 4.69 | 2.43 | 1.95 | 3.57 | 26.4 °C |
| September | 4.65 | 2.96 | 2.39 | 3.71 | 26.3 °C |
| October | 4.97 | 4.01 | 3.29 | 4.27 | 25.1 °C |
| November | 4.89 | 5.10 | 4.21 | 4.58 | 23.6 °C |
| December | 4.73 | 5.61 | 4.66 | 4.65 | 21.9 °C |
| Year | 5.07 avg | 3.63 avg | 1078 kWh | 1531 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 710 Wp of panels at 70°, versus 330 Wp at 19°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Nong Kung Si
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.
2.5 mrow pitch at 70°
2.5 mrow pitch at 19°
How Nong Kung Si compares in Thailand
Against the other 294 places in Thailand with climate data, for a fixed array at its best angle.
157thof 295 places in Thailand for sunshine, shared: 5.07 peak sun hours a day on flat ground.
+1%solar energy a year compared with the average place in Thailand: 1,531 against 1,509 kWh per kWp.
+11 mindaylight on the longest day, compared with Bangkok: 13 h 07 min against 12 h 56 min.
19°best year-round tilt here; across Thailand it runs from 4° in Narathiwat to 23° in Mae Chan.
Of the 295 places in Thailand, Bangkok and 7 other places get the most sun (5.23 peak sun hours a day) and Mae Ramat the least (4.74); Nong Kung Si ranks joint 157th. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.67 kWh a day here, against 1.53 kWh on average in Thailand. The shortest day lasts 11 h 08 min, −11 min compared with Bangkok.
Solar forecast for Nong Kung Si, 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 Nong Kung Si: 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.