Heilongjiang · China · 45.75° N · 130.58° E
Solar position in Boli
Sun position, daylight and the best solar panel angle for Boli — computed for 45.75° N, 130.58° E, 216 m above sea level.
The sun right now
Sun in Boli today
Sunday, 25 October 2026 · local time UTC+8
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:07 | sun 18° below horizon |
| Nautical dawn | 04:41 | 12° below |
| Civil dawn | 05:16 | 6° below |
| Sunrise | 05:47 | 106° ESE |
| Golden hour ends | 06:29 | sun 6° up |
| Solar noon | 11:01 | 32.2° high |
| Golden hour starts | 15:33 | sun 6° up |
| Sunset | 16:15 | 253° WSW |
| Civil dusk | 16:46 | 6° below |
| Nautical dusk | 17:20 | 12° below |
| Astronomical dusk | 17:55 | 18° below |
| Day length | 10 h 28 min | |
Sun path diagram for Boli
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 67.7° at solar noon in Boli; on the December solstice only 20.9°. Sunrise swings from 54° NE in June to 124° ESE in December — a 70° 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 | 06:50 | 11:29 | 16:07 | 9 h 16 min | 24.4° |
| February | 06:10 | 11:31 | 16:52 | 10 h 41 min | 33.7° |
| March | 05:19 | 11:25 | 17:30 | 12 h 11 min | 44.5° |
| April | 04:22 | 11:16 | 18:11 | 13 h 49 min | 56.1° |
| May | 03:40 | 11:14 | 18:48 | 15 h 08 min | 64.4° |
| June | 03:27 | 11:19 | 19:11 | 15 h 43 min | 67.7° |
| July | 03:48 | 11:24 | 18:59 | 15 h 11 min | 64.7° |
| August | 04:24 | 11:20 | 18:16 | 13 h 52 min | 56.4° |
| September | 05:02 | 11:10 | 17:18 | 12 h 15 min | 45.0° |
| October | 05:41 | 11:02 | 16:22 | 10 h 41 min | 33.6° |
| November | 06:24 | 11:03 | 15:41 | 9 h 17 min | 24.4° |
| December | 06:55 | 11:15 | 15:35 | 8 h 40 min | 20.9° |
A year of daylight in Boli
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 Boli
Fixed array facing south (azimuth 180°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
46°collects the most energy over a year: 1544 kWh per kWp.
52°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° | 1165 | 75% | 1.40 | 3.2× |
| 15° | 1368 | 89% | 2.24 | 2.0× |
| 30° | 1497 | 97% | 2.95 | 1.7× |
| 45° | 1544 | 100% | 3.49 | 1.6× |
| 46° year-round best = latitude | 1544 | 100% | 3.52 | 1.6× |
| 52° off-grid best | 1536 | 100% | 3.68 | 1.5× |
| 60° | 1506 | 98% | 3.83 | 1.7× |
| 70° | 1436 | 93% | 3.93 | 1.9× |
| 90° | 1199 | 78% | 3.83 | 2.7× |
A fixed array in Boli produces the most over a year at 46°. The design month for an off-grid system is December: at 52° it makes 3.68 kWh per kWp a day, 4% more than at 46°, and costs 0% of the yearly total. Why steep panels win winter.
Off-grid solar in Boli at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 46° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 46° | Mean temp. |
|---|---|---|---|---|---|
| January snow | 2.09 | 4.87 | 4.70 | 4.25 | -18.6 °C |
| February snow | 3.23 | 5.87 | 5.59 | 5.31 | -14.8 °C |
| March snow | 4.31 | 5.85 | 5.39 | 5.46 | -5.4 °C |
| April | 4.75 | 4.24 | 3.75 | 4.47 | 4.8 °C |
| May | 5.25 | 3.78 | 3.23 | 4.18 | 12.8 °C |
| June | 5.48 | 3.58 | 2.98 | 4.00 | 18.7 °C |
| July | 5.21 | 3.56 | 2.93 | 3.85 | 21.7 °C |
| August | 4.72 | 3.80 | 3.16 | 3.90 | 20.3 °C |
| September | 4.20 | 4.53 | 3.88 | 4.35 | 14.0 °C |
| October | 2.96 | 4.40 | 3.91 | 3.99 | 4.4 °C |
| November snow | 1.97 | 4.17 | 3.87 | 3.56 | -6.6 °C |
| December snow | 1.66 | 4.10 | 3.93 | 3.52 | -16.6 °C |
| Year | 3.82 avg | 4.39 avg | 1436 kWh | 1544 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 400 Wp of panels at 70°, versus 340 Wp at 46°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Boli
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.
6.6 mrow pitch at 70°
5.9 mrow pitch at 46°
How Boli compares in China
Against the other 2,094 places in China with climate data, for a fixed array at its best angle.
939thof 2,095 places in China for sunshine, shared: 3.82 peak sun hours a day on flat ground.
+22%solar energy a year compared with the average place in China: 1,544 against 1,262 kWh per kWp.
+1 h 32 mindaylight on the longest day, compared with Shanghai: 15 h 43 min against 14 h 11 min.
46°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); Boli ranks joint 939th. In its darkest month, July, 1 kWp of off-grid panels at 70° makes 2.93 kWh a day here, against 2.06 kWh on average in China. The shortest day lasts 8 h 40 min, −1 h 27 min compared with Shanghai.
Solar forecast for Boli, next 48 hours
Expected output of 1 kWp at 70°, computed from the ICON-EU weather model of the Deutscher Wetterdienst (DWD), Europe.
Loading the latest forecast…
Questions about the sun in Boli
What is the best solar panel angle in Boli?
What time is sunrise and sunset in Boli today?
How many peak sun hours does Boli get?
How high does the sun get in Boli?
Is Boli a good place for solar panels?
Places near Boli
Put this on your site
A free, live card for Boli: 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.