Ogooué-Lolo · Gabon · 1.14° S · 12.46° E
Solar position in Koulamoutou
Sun position, daylight and the best solar panel angle for Koulamoutou — computed for 1.14° S, 12.46° E, 282 m above sea level.
The sun right now
Sun in Koulamoutou today
Saturday, 24 October 2026 · local time UTC+1
| Event | Time | Direction / height |
|---|---|---|
| Astronomical dawn | 04:39 | sun 18° below horizon |
| Nautical dawn | 05:04 | 12° below |
| Civil dawn | 05:28 | 6° below |
| Sunrise | 05:50 | 102° ESE |
| Golden hour ends | 06:17 | sun 6° up |
| Solar noon | 11:54 | 79.3° high |
| Golden hour starts | 17:30 | sun 6° up |
| Sunset | 17:58 | 258° WSW |
| Civil dusk | 18:19 | 6° below |
| Nautical dusk | 18:44 | 12° below |
| Astronomical dusk | 19:08 | 18° below |
| Day length | 12 h 09 min | |
Sun path diagram for Koulamoutou
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 65.4° at solar noon in Koulamoutou; on the December solstice only 67.7°. Sunrise swings from 67° ENE in June to 113° ESE in December — a 47° 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 | 06:16 | 12:21 | 18:26 | 12 h 10 min | 71.3° |
| February | 06:19 | 12:23 | 18:27 | 12 h 08 min | 80.7° |
| March | 06:14 | 12:17 | 18:20 | 12 h 06 min | 88.5° |
| April | 06:06 | 12:08 | 18:11 | 12 h 05 min | 76.9° |
| May | 06:04 | 12:06 | 18:08 | 12 h 04 min | 68.6° |
| June | 06:10 | 12:11 | 18:13 | 12 h 03 min | 65.4° |
| July | 06:14 | 12:16 | 18:18 | 12 h 04 min | 68.5° |
| August | 06:10 | 12:13 | 18:15 | 12 h 05 min | 76.8° |
| September | 06:00 | 12:03 | 18:06 | 12 h 06 min | 88.3° |
| October | 05:50 | 11:54 | 17:59 | 12 h 08 min | 80.4° |
| November | 05:50 | 11:55 | 18:01 | 12 h 11 min | 71.2° |
| December | 06:02 | 12:08 | 18:13 | 12 h 11 min | 67.7° |
A year of daylight in Koulamoutou
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 Koulamoutou
Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.
1°collects the most energy over a year: 1262 kWh per kWp.
15°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° | 1262 | 100% | 2.86 | 1.4× |
| 1° year-round best = latitude | 1262 | 100% | 2.87 | 1.4× |
| 15° off-grid best | 1232 | 98% | 2.93 | 1.3× |
| 30° | 1139 | 90% | 2.85 | 1.5× |
| 45° | 990 | 78% | 2.64 | 1.7× |
| 60° | 801 | 63% | 2.30 | 2.2× |
| 70° | 677 | 54% | 2.01 | 2.2× |
| 90° | 476 | 38% | 1.35 | 1.8× |
A fixed array in Koulamoutou produces the most over a year at 1°. The design month for an off-grid system is August: at 15° it makes 2.93 kWh per kWp a day, 2% more than at 1°, and costs 2% of the yearly total. Why steep panels win winter.
Off-grid solar in Koulamoutou at 70°
Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 1° (year-round best).
| Month | Sun hours, flat | Sun hours at 70° | kWh/kWp/day at 70° | at 1° | Mean temp. |
|---|---|---|---|---|---|
| January | 4.86 | 1.56 | 1.24 | 3.85 | 24.6 °C |
| February | 4.79 | 1.78 | 1.42 | 3.81 | 24.9 °C |
| March | 5.07 | 2.45 | 1.98 | 4.06 | 24.7 °C |
| April | 4.85 | 3.08 | 2.51 | 3.88 | 24.6 °C |
| May | 4.29 | 3.23 | 2.64 | 3.43 | 24.5 °C |
| June | 3.81 | 3.06 | 2.50 | 3.04 | 24.4 °C |
| July | 3.60 | 2.79 | 2.28 | 2.87 | 24.3 °C |
| August | 3.61 | 2.48 | 2.01 | 2.87 | 24.5 °C |
| September | 4.00 | 2.25 | 1.81 | 3.19 | 24.4 °C |
| October | 4.42 | 1.84 | 1.48 | 3.53 | 23.8 °C |
| November | 4.42 | 1.49 | 1.18 | 3.52 | 23.8 °C |
| December | 4.38 | 1.49 | 1.18 | 3.47 | 24.2 °C |
| Year | 4.34 avg | 2.30 avg | 677 kWh | 1262 kWh |
Sizing example. To run a 1 kWh-per-day load through December on LiFePO4 batteries (charge controller, battery and inverter losses included) you need about 1,000 Wp of panels at 70°, versus 410 Wp at 1°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.
Row spacing in Koulamoutou
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.
1.7 mrow pitch at 70°
2.0 mrow pitch at 1°
How Koulamoutou compares in Gabon
Against the other 14 places in Gabon with climate data, for a fixed array at its best angle.
5thof 15 places in Gabon for sunshine: 4.34 peak sun hours a day on flat ground.
+3%solar energy a year compared with the average place in Gabon: 1,262 against 1,229 kWh per kWp.
+3 mindaylight on the longest day, compared with Libreville: 12 h 11 min against 12 h 09 min.
1°best year-round tilt here; across Gabon it runs from 0° in Lambaréné to 3° in Oyem.
Of the 15 places in Gabon, Bitam and one other place get the most sun (4.39 peak sun hours a day) and Tchibanga and one other place the least (3.96); Koulamoutou ranks 5th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.18 kWh a day here, against 1.10 kWh on average in Gabon. The shortest day lasts 12 h 03 min, −3 min compared with Libreville.
Solar forecast for Koulamoutou, 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 Koulamoutou: 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.