15 places · sun position · panel angle
Solar data for Gabon
Across the 15 places in Gabon the best fixed tilt for solar panels runs from 0° in Lambaréné to 3° in Oyem, and flat ground gets 4.0 to 4.4 peak sun hours a day. Every number is computed for each place.
Solar power in Gabon at a glance
Averages over 15 places with climate data, for a fixed array facing the equator.
- 3.96–4.04
- 4.04–4.13
- 4.13–4.21
- 4.21–4.30
- 4.30–4.39
Peak sun hours a day on flat ground. Each dot is one place.
The sunniest places in Gabon, with 4.39 peak sun hours a day on flat ground, are Bitam and one other place; the least sunny are Tchibanga and one other place with 3.96. A 1 kWp array at its best angle makes from 1,147 kWh a year in Tchibanga to 1,282 kWh in Bitam — 1,229 kWh on average.
The best year-round tilt runs from 0° in Lambaréné to 3° in Oyem. Off-grid systems are sized for the darkest month and do better steeper, at 6° on average: at 70° that month brings 1.00 kWh per kWp a day in Ntoum and 1.18 kWh in Moanda.
Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.
Sunniest places in Gabon
Ranked by peak sun hours on flat ground: the yearly average of a day's sunshine energy (NASA POWER climatology). Output: 1 kWp at its best year-round angle.
| Rank | Place | Region | Sun hours/day | kWh per kWp a year | Best tilt |
|---|---|---|---|---|---|
| 1 | Bitam | Woleu-Ntem | 4.39 | 1,282 | 3° |
| 1 | Franceville | Haut-Ogooué | 4.39 | 1,280 | 1° |
| 3 | Moanda | Haut-Ogooué | 4.38 | 1,277 | 1° |
| 4 | Port-Gentil | Ogooué-Maritime | 4.35 | 1,260 | 1° |
| 5 | Koulamoutou | Ogooué-Lolo | 4.34 | 1,262 | 1° |
| 6 | Oyem | Woleu-Ntem | 4.33 | 1,264 | 3° |
| 7 | Akanda | Estuaire | 4.31 | 1,245 | 2° |
| 8 | Libreville | Estuaire | 4.30 | 1,244 | 2° |
| 9 | Owendo | Estuaire | 4.29 | 1,240 | 2° |
| 10 | Makokou | Ogooué-Ivindo | 4.23 | 1,230 | 2° |
Solar by region in Gabon
Averages of the places in each region, sunniest first. Darkest month: what 1 kWp of off-grid panels at 70° makes a day in the worst month of the year.
| Region | Places | Sun hours/day | kWh per kWp a year | Best tilt | Darkest month at 70° | Sunniest place |
|---|---|---|---|---|---|---|
| Haut-Ogooué | 2 | 4.39 | 1,278 | 1° | 1.18 kWh | Franceville |
| Woleu-Ntem | 2 | 4.36 | 1,273 | 3° | 1.12 kWh | Bitam |
| Ogooué-Maritime | 1 | 4.35 | 1,260 | 1° | 1.08 kWh | Port-Gentil |
| Ogooué-Lolo | 1 | 4.34 | 1,262 | 1° | 1.18 kWh | Koulamoutou |
| Estuaire | 4 | 4.28 | 1,237 | 2° | 1.02 kWh | Akanda |
| Ogooué-Ivindo | 1 | 4.23 | 1,230 | 2° | 1.05 kWh | Makokou |
| Moyen-Ogooué | 2 | 4.04 | 1,169 | 0° | 1.11 kWh | Lambaréné |
| Ngouni | 1 | 3.96 | 1,150 | 1° | 1.13 kWh | Mouila |
| Nyanga | 1 | 3.96 | 1,147 | 2° | 1.12 kWh | Tchibanga |
Largest places in Gabon at a glance
| Place | Latitude | Best tilt | Off-grid tilt | Sun hours/day (flat) |
|---|---|---|---|---|
| Libreville | 0.4° N | 2° | 0° | 4.30 |
| Port-Gentil | 0.7° S | 1° | 4° | 4.35 |
| Franceville | 1.6° S | 1° | 15° | 4.39 |
| Owendo | 0.3° N | 2° | 0° | 4.29 |
| Oyem | 1.6° N | 3° | 0° | 4.33 |
| Moanda | 1.6° S | 1° | 15° | 4.38 |
| Ntoum | 0.4° N | 2° | 0° | 4.22 |
| Lambaréné | 0.7° S | 0° | 14° | 4.05 |
| Mouila | 1.9° S | 1° | 15° | 3.96 |
| Akanda | 0.6° N | 2° | 0° | 4.31 |
| Tchibanga | 2.9° S | 2° | 6° | 3.96 |
| Bitam | 2.1° N | 3° | 0° | 4.39 |
| Koulamoutou | 1.1° S | 1° | 15° | 4.34 |
| Oyam | 0.2° S | 0° | 13° | 4.03 |
| Makokou | 0.6° N | 2° | 0° | 4.23 |
Daylight and clock time in Gabon
In Bitam (2.1° N), the northernmost place, the longest day of the year lasts 12 h 15 min and the shortest 12 h 00 min; in Tchibanga (2.9° S), the southernmost, 12 h 18 min and 11 h 57 min. Gabon does not use daylight saving time: the clocks stay the same all year.
| Time zone | Places | UTC offset | Clocks change in 2026 |
|---|---|---|---|
| Africa/Libreville | 15 | UTC+1 | no daylight saving time |