Guangdong · China · 23.43° N · 115.83° E
Solar position in Hepo
Sun position, daylight and the best solar panel angle for Hepo — computed for 23.43° N, 115.83° E, 41 m above sea level.
The sun right now
Sun in Hepo today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 05:02 | sun 18° below horizon |
| Nautical dawn | 05:28 | 12° below |
| Civil dawn | 05:55 | 6° below |
| Sunrise | 06:18 | 103° ESE |
| Golden hour ends | 06:49 | sun 6° up |
| Solar noon | 12:00 | 54.5° high |
| Golden hour starts | 17:12 | sun 6° up |
| Sunset | 17:43 | 257° WSW |
| Civil dusk | 18:06 | 6° below |
| Nautical dusk | 18:32 | 12° below |
| Astronomical dusk | 18:58 | 18° below |
| Day length | 11 h 25 min | |
Sun path diagram for Hepo
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 90.0° at solar noon in Hepo; on the December solstice only 43.1°. Sunrise swings from 64° ENE in June to 115° ESE in December — a 51° 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 | 07:00 | 12:27 | 17:55 | 10 h 56 min | 46.7° |
| February | 06:45 | 12:30 | 18:15 | 11 h 30 min | 56.0° |
| March | 06:20 | 12:24 | 18:28 | 12 h 08 min | 66.8° |
| April | 05:51 | 12:15 | 18:40 | 12 h 49 min | 78.4° |
| May | 05:32 | 12:13 | 18:53 | 13 h 21 min | 86.8° |
| June | 05:31 | 12:18 | 19:05 | 13 h 35 min | 90.0° |
| July | 05:41 | 12:23 | 19:04 | 13 h 22 min | 87.0° |
| August | 05:54 | 12:19 | 18:44 | 12 h 50 min | 78.7° |
| September | 06:04 | 12:09 | 18:14 | 12 h 10 min | 67.3° |
| October | 06:16 | 12:01 | 17:46 | 11 h 30 min | 55.9° |
| November | 06:34 | 12:02 | 17:30 | 10 h 56 min | 46.7° |
| December | 06:53 | 12:14 | 17:35 | 10 h 42 min | 43.1° |
A year of daylight in Hepo
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 Hepo
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
22°collects the most energy over a year: 1241 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 | March kWh/kWp/day | Best ÷ worst month |
|---|---|---|---|---|
| 0° | 1171 | 94% | 2.74 | 1.6× |
| 15° | 1234 | 99% | 2.88 | 1.4× |
| 22° year-round best off-grid best | 1241 | 100% | 2.90 | 1.3× |
| 23° = latitude | 1241 | 100% | 2.90 | 1.3× |
| 30° | 1231 | 99% | 2.88 | 1.4× |
| 45° | 1162 | 94% | 2.73 | 1.5× |
| 60° | 1032 | 83% | 2.44 | 1.8× |
| 70° | 917 | 74% | 2.18 | 2.1× |
| 90° | 653 | 53% | 1.54 | 2.8× |
A fixed array in Hepo produces the most over a year at 22°. The design month for an off-grid system is March: at 22° it makes 2.90 kWh per kWp a day, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Hepo at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 22° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 22° | Mean temp. |
|---|---|---|---|---|---|
| January | 3.12 | 3.67 | 3.15 | 3.18 | 13.2 °C |
| February | 3.18 | 3.01 | 2.55 | 2.95 | 15.3 °C |
| March | 3.37 | 2.62 | 2.18 | 2.90 | 18.0 °C |
| April | 3.78 | 2.38 | 1.94 | 3.02 | 21.5 °C |
| May | 4.20 | 2.19 | 1.76 | 3.18 | 24.6 °C |
| June | 4.41 | 2.10 | 1.66 | 3.24 | 26.3 °C |
| July | 5.27 | 2.40 | 1.91 | 3.88 | 27.1 °C |
| August | 4.95 | 2.74 | 2.20 | 3.81 | 26.9 °C |
| September | 4.66 | 3.29 | 2.68 | 3.84 | 25.7 °C |
| October | 4.30 | 3.93 | 3.25 | 3.90 | 22.7 °C |
| November | 3.53 | 4.01 | 3.37 | 3.49 | 19.2 °C |
| December | 3.18 | 4.07 | 3.48 | 3.36 | 14.4 °C |
| Year | 4.00 avg | 3.04 avg | 917 kWh | 1241 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 410 Wp at 22°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Hepo
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.
2.9 mrow pitch at 70°
2.7 mrow pitch at 22°
How Hepo compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
553rdof 2,095 places in China for sunshine, shared: 4.00 peak sun hours a day on flat ground.
−2%solar energy a year compared with the average place in China: 1,241 against 1,262 kWh per kWp.
−36 mindaylight on the longest day, compared with Shanghai: 13 h 35 min against 14 h 11 min.
22°best year-round tilt here; across China it runs from 14° in Haikou to 52° in Xilinji.
Of the 2,095 places in China, Nyêmo gets the most sun (5.75 peak sun hours a day) and Baima and 11 other places the least (2.91); Hepo ranks joint 553rd. In its darkest month, June, 1 kWp of off-grid panels at 70° makes 1.67 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 10 h 42 min, +35 min compared with Shanghai.
Solar forecast for Hepo, 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 Hepo
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Places near Hepo
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A free, live card for Hepo: 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.