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Solar data for Reunion

Across the 14 places in Reunion the best fixed tilt for solar panels runs from 19° in Saint-Denis to 20° in Saint-Paul, and flat ground gets 5.6 to 5.7 peak sun hours a day. Every number is computed for each place.

Solar power in Reunion at a glance

Averages over 14 places with climate data, for a fixed array facing north.

Best panel angle20°average, facing north
Peak sun hours5.65a day on flat ground
1 kWp makes1,733kWh a year at the best angle
Off-grid angle33°average, for the darkest month
Saint-DenisLe Port (most sun)
  • 5.56–5.59
  • 5.59–5.62
  • 5.62–5.65
  • 5.65–5.68
  • 5.68–5.71

Peak sun hours a day on flat ground. Each dot is one place.

The sunniest places in Reunion, with 5.71 peak sun hours a day on flat ground, are Le Port and one other place; the least sunny is Saint-Pierre with 5.56. A 1 kWp array at its best angle makes from 1,710 kWh a year in Saint-Pierre to 1,747 kWh in Le Port — 1,733 kWh on average.

The best year-round tilt runs from 19° in Saint-Denis to 20° in Saint-Paul. Off-grid systems are sized for the darkest month and do better steeper, at 33° on average: at 70° that month brings 1.86 kWh per kWp a day in Saint-Denis and 1.90 kWh in Saint-Joseph.

Size an off-grid system or open any place below for its sun path, monthly table and tilt curve.

Sunniest places in Reunion

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.

RankPlaceRegionSun hours/daykWh per kWp a yearBest tilt
1Le PortReunion5.711,74720°
1La PossessionReunion5.701,74520°
3Saint-PaulReunion5.691,74520°
3Sainte-SuzanneReunion5.691,74219°
3Saint-DenisReunion5.691,74219°
3Sainte-MarieReunion5.691,74019°
7Saint-AndréReunion5.681,74019°
7Saint-BenoîtReunion5.681,73919°
9Saint-LeuReunion5.661,73520°
10Piton Saint-LeuReunion5.641,73020°

Largest places in Reunion at a glance

PlaceLatitudeBest tiltOff-grid tiltSun hours/day (flat)
Saint-Denis20.9° S19°33°5.69
Saint-Paul21.0° S20°33°5.69
Saint-Pierre21.3° S20°34°5.56
Le Tampon21.3° S20°34°5.58
Saint-André21.0° S19°33°5.68
Saint-Louis21.3° S20°34°5.60
Saint-Joseph21.4° S20°34°5.58
Saint-Benoît21.0° S19°34°5.68
La Possession20.9° S20°33°5.70
Saint-Leu21.2° S20°33°5.66
Sainte-Marie20.9° S19°33°5.69
Le Port20.9° S20°33°5.71
Piton Saint-Leu21.2° S20°33°5.64
Sainte-Suzanne20.9° S19°33°5.69

Daylight and clock time in Reunion

In Saint-Denis (20.9° S), the northernmost place, the longest day of the year lasts 13 h 24 min and the shortest 10 h 52 min; in Saint-Joseph (21.4° S), the southernmost, 13 h 26 min and 10 h 50 min. Reunion does not use daylight saving time: the clocks stay the same all year.

Time zonePlacesUTC offsetClocks change in 2026
Indian/Reunion14UTC+4no daylight saving time

Questions about solar in Reunion

What is the best angle for solar panels in Reunion?
Facing north, between 19° and 20° depending on the place — 20° on average over 14 places. Off-grid systems that must get through the darkest month do better steeper, at about 33° on average.
How many peak sun hours does Reunion get?
From 5.6 hours a day in Saint-Pierre to 5.7 in Le Port on flat ground, averaged over the year; 5.7 on average.
How much electricity does 1 kWp of solar panels produce in Reunion?
About 1,733 kWh a year at the best fixed angle on average, from 1,710 kWh in Saint-Pierre to 1,747 kWh in Le Port. These are long-term climate averages; a single year can be several per cent higher or lower.
Where is the sunniest place in Reunion?
Le Port (Reunion) and 1 other place share the most sun of the 14 places: 5.71 peak sun hours a day on flat ground. 1 kWp in Le Port makes about 1,747 kWh a year.
Does Reunion use daylight saving time?
Reunion does not use daylight saving time: the clocks stay the same all year.
How long is the longest day in Reunion?
13 h 26 min in Saint-Joseph; the shortest day lasts 10 h 50 min in Saint-Joseph.

All places in Reunion