Yanggang-do · North Korea · 41.40° N · 128.19° E
Solar position in Hyesan-dong
Sun position, daylight and the best solar panel angle for Hyesan-dong — computed for 41.40° N, 128.19° E, 754 m above sea level.
The sun right now
Sun in Hyesan-dong today
Sunday, 25 October 2026 · local time UTC+9
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:17 | sun 18° below horizon |
| Nautical dawn | 05:49 | 12° below |
| Civil dawn | 06:21 | 6° below |
| Sunrise | 06:49 | 105° ESE |
| Golden hour ends | 07:28 | sun 6° up |
| Solar noon | 12:11 | 36.6° high |
| Golden hour starts | 16:53 | sun 6° up |
| Sunset | 17:32 | 254° WSW |
| Civil dusk | 18:00 | 6° below |
| Nautical dusk | 18:32 | 12° below |
| Astronomical dusk | 19:04 | 18° below |
| Day length | 10 h 42 min | |
Sun path diagram for Hyesan-dong
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 72.0° at solar noon in Hyesan-dong; on the December solstice only 25.2°. Sunrise swings from 57° ENE in June to 121° ESE in December — a 64° 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 | 07:48 | 12:38 | 17:29 | 9 h 41 min | 28.7° |
| February | 07:14 | 12:41 | 18:07 | 10 h 53 min | 38.0° |
| March | 06:29 | 12:34 | 18:39 | 12 h 10 min | 48.8° |
| April | 05:39 | 12:26 | 19:13 | 13 h 34 min | 60.5° |
| May | 05:03 | 12:23 | 19:44 | 14 h 41 min | 68.8° |
| June | 04:53 | 12:28 | 20:04 | 15 h 10 min | 72.0° |
| July | 05:11 | 12:33 | 19:55 | 14 h 44 min | 69.1° |
| August | 05:41 | 12:30 | 19:18 | 13 h 36 min | 60.7° |
| September | 06:13 | 12:20 | 18:27 | 12 h 14 min | 49.3° |
| October | 06:45 | 12:11 | 17:37 | 10 h 53 min | 38.0° |
| November | 07:22 | 12:12 | 17:03 | 9 h 41 min | 28.7° |
| December | 07:49 | 12:25 | 17:00 | 9 h 11 min | 25.2° |
A year of daylight in Hyesan-dong
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 Hyesan-dong
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
42°collects the most energy over a year: 1496 kWh per kWp.
43°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 | December kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1201 | 80% | 1.70 | 2.6× |
| 15° | 1373 | 92% | 2.47 | 1.9× |
| 30° | 1472 | 98% | 3.12 | 1.6× |
| 41° = latitude | 1496 | 100% | 3.49 | 1.5× |
| 42° year-round best | 1496 | 100% | 3.52 | 1.4× |
| 43° off-grid best | 1496 | 100% | 3.54 | 1.4× |
| 45° | 1494 | 100% | 3.60 | 1.5× |
| 60° | 1437 | 96% | 3.87 | 1.7× |
| 70° | 1358 | 91% | 3.94 | 1.9× |
| 90° | 1113 | 74% | 3.77 | 2.8× |
A fixed array in Hyesan-dong produces the most over a year at 42°. The design month for an off-grid system is December: at 43° it makes 3.54 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Hyesan-dong at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 42° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 42° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.39 | 4.70 | 4.49 | 4.07 | -15.4 °C |
| February snow | 3.32 | 5.24 | 4.96 | 4.76 | -12.4 °C |
| March snow | 4.35 | 5.34 | 4.93 | 5.08 | -5.7 °C |
| April | 4.91 | 4.05 | 3.61 | 4.50 | 3.0 °C |
| May | 5.30 | 3.53 | 3.04 | 4.19 | 10.3 °C |
| June | 5.12 | 3.17 | 2.66 | 3.77 | 15.4 °C |
| July | 4.78 | 3.08 | 2.56 | 3.55 | 18.5 °C |
| August | 4.59 | 3.43 | 2.87 | 3.73 | 18.1 °C |
| September | 4.25 | 4.17 | 3.59 | 4.19 | 12.4 °C |
| October | 3.37 | 4.58 | 4.08 | 4.24 | 4.5 °C |
| November snow | 2.30 | 4.35 | 4.01 | 3.67 | -4.7 °C |
| December snow | 1.98 | 4.14 | 3.94 | 3.52 | -13.6 °C |
| Year | 3.89 avg | 4.14 avg | 1358 kWh | 1496 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 460 Wp of panels at 70°, versus 340 Wp at 42°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Hyesan-dong
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.
5.3 mrow pitch at 70°
4.8 mrow pitch at 42°
How Hyesan-dong compares in North Korea
Against the other 96 places in North Korea with climate data, for a fixed array at its best angle.
8thof 97 places in North Korea for sunshine, shared: 3.89 peak sun hours a day on flat ground.
+5%solar energy a year compared with the average place in North Korea: 1,496 against 1,424 kWh per kWp.
+16 mindaylight on the longest day, compared with Pyongyang: 15 h 10 min against 14 h 55 min.
42°best year-round tilt here; across North Korea it runs from 34° in Ongjin to 44° in Namyang-nodongjagu.
Of the 97 places in North Korea, Sinp’o and one other place get the most sun (3.91 peak sun hours a day) and Ŏrang and one other place the least (3.70); Hyesan-dong ranks joint 8th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.56 kWh a day here, against 2.28 kWh on average in North Korea. The shortest day lasts 9 h 11 min, −15 min compared with Pyongyang.
Solar forecast for Hyesan-dong, 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 Hyesan-dong: 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.