Solarposition.org

Reunion · Reunion · 20.88° S · 55.45° E

Solar position in Saint-Denis

Sun position, daylight and the best solar panel angle for Saint-Denis — computed for 20.88° S, 55.45° E, 44 m above sea level.

Sunrise today05:40103° ESE
Sunset today18:24257° WSW
Best panel angle19°year-round, facing north
Off-grid angle33°best for the darkest month

The sun right now

Azimuth180.0°
Elevation80.9°
At solar noon, 12:02Open on the sun map

Sun in Saint-Denis today

Saturday, 24 October 2026 · local time UTC+4

EventTimeDirection / height
Astronomical dawn04:23sun 18° below horizon
Nautical dawn04:5112° below
Civil dawn05:176° below
Sunrise05:40103° ESE
Golden hour ends06:10sun 6° up
Solar noon12:0280.9° high
Golden hour starts17:54sun 6° up
Sunset18:24257° WSW
Civil dusk18:476° below
Nautical dusk19:1412° below
Astronomical dusk19:4118° below
Day length12 h 44 min

Sun path diagram for Saint-Denis

Where the sun stands in the sky: the centre is straight overhead, the outer ring is the horizon. Numbers mark local clock hours.

15°30°45°60°75°N30°60°E120°150°S210°240°W300°330°June solstice891011121314151617EquinoxDecember solstice6789101112131415161718Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 45.7° at solar noon in Saint-Denis; on the December solstice only 87.4°. Sunrise swings from 65° ENE in June to 116° ESE in December — a 50° 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.

MonthSunriseSolar noonSunsetDay lengthNoon elevation
January05:5312:2919:0413 h 11 min89.0°
February06:1112:3118:5112 h 40 min79.6°
March06:2212:2518:2812 h 06 min68.8°
April06:3112:1618:0111 h 30 min57.2°
May06:4312:1417:4611 h 03 min48.9°
June06:5412:1917:4510 h 52 min45.7°
July06:5312:2417:5511 h 02 min48.7°
August06:3612:2118:0611 h 30 min57.1°
September06:0912:1118:1312 h 05 min68.5°
October05:4212:0218:2312 h 40 min79.9°
November05:2812:0418:3913 h 11 min89.1°
December05:3412:1618:5813 h 24 min87.4°

A year of daylight in Saint-Denis

Each column is one day of 2026. Bright: sun above the horizon; soft: civil twilight; line: solar noon. Steps are daylight saving time changes.

00:0003:0006:0009:0012:0015:0018:0021:0000:00JanFebMarAprMayJunJulAugSepOctNovDec

Best solar panel angle in Saint-Denis

Fixed array facing north (azimuth 0°). Energy per kWp from NASA POWER monthly climate, including clouds, temperature and snow reflection.

19°collects the most energy over a year: 1742 kWh per kWp.

33°gives the most in the darkest month — the one an off-grid system is sized for.

20%30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 19°Best worst-month 33°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJune kWh/kWp/dayBest ÷ worst month
0°165595%3.091.9×
15°1737100%3.791.4×
19° year-round best1742100%3.941.4×
21° = latitude1741100%4.011.3×
30°171799%4.261.2×
33° off-grid best170098%4.321.2×
45°159692%4.461.3×
60°138479%4.391.8×
70°120269%4.192.3×
90°81047%3.453.5×

A fixed array in Saint-Denis produces the most over a year at 19°. The design month for an off-grid system is June: at 33° it makes 4.32 kWh per kWp a day, 10% more than at 19°, and costs 2% of the yearly total. Why steep panels win winter.

Off-grid solar in Saint-Denis at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 19° (year-round best).

0123456January: 2.01 (70°)2.0JanFebruary: 2.60 (70°)2.6FebMarch: 3.23 (70°)3.2MarApril: 3.89 (70°)3.9AprMay: 4.11 (70°)4.1MayJune: 4.19 (70°)4.2JunJuly: 4.25 (70°)4.3JulAugust: 4.25 (70°)4.2AugSeptember: 3.86 (70°)3.9SepOctober: 3.04 (70°)3.0OctNovember: 2.20 (70°)2.2NovDecember: 1.86 (70°)1.9Dec19°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 19°Mean temp.
January6.652.522.014.8926.8 °C
February6.473.232.605.0127.2 °C
March5.823.983.234.8127.0 °C
April5.114.763.894.5926.2 °C
May4.305.014.114.1624.9 °C
June3.915.074.193.9423.5 °C
July4.135.134.254.1122.5 °C
August4.925.124.254.6422.2 °C
September5.924.663.865.1722.5 °C
October6.693.693.045.3923.3 °C
November7.142.712.205.3424.4 °C
December7.282.331.865.2525.9 °C
Year5.69 avg4.02 avg1202 kWh1742 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 630 Wp of panels at 70°, versus 300 Wp at 19°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Saint-Denis

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.

2.7 mrow pitch at 70°

2.6 mrow pitch at 19°

Row spacing calculator

How Saint-Denis compares in Reunion

Against the other 13 places in Reunion with climate data, for a fixed array at its best angle.

3rdof 14 places in Reunion for sunshine, shared: 5.69 peak sun hours a day on flat ground.

+1%solar energy a year compared with the average place in Reunion: 1,742 against 1,733 kWh per kWp.

−1 mindaylight on the longest day, compared with the average place in Reunion: 13 h 24 min against 13 h 25 min.

19°best year-round tilt here; across Reunion it runs from 19° in Saint-Denis to 20° in Saint-Paul.

Of the 14 places in Reunion, Le Port and one other place get the most sun (5.71 peak sun hours a day) and Saint-Pierre the least (5.56); Saint-Denis ranks joint 3rd. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 1.86 kWh a day here, against 1.88 kWh on average in Reunion. The shortest day lasts 10 h 52 min, +1 min compared with the average.

The sunniest places in Reunion

Solar forecast for Saint-Denis, 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 Saint-Denis

What is the best solar panel angle in Saint-Denis?
For a fixed array facing north, the best year-round tilt in Saint-Denis is 19°, worth about 1742 kWh per kWp a year. An off-grid system that has to get through June does better at about 33°.
What time is sunrise and sunset in Saint-Denis today?
On 24 October 2026 the sun rises at 05:40 and sets at 18:24 local time (UTC+4), giving 12 h 44 min of daylight. Solar noon is at 12:02.
How many peak sun hours does Saint-Denis get?
On a flat surface 5.7 hours a day averaged over the year, from 3.9 in June to 7.3 in December. Panels tilted at 70° receive 2.3 sun hours a day in December.
How high does the sun get in Saint-Denis?
At solar noon the sun stands 45.7° above the horizon on the June solstice and 87.4° on the December solstice.
Is Saint-Denis a good place for solar panels?
With 5.7 peak sun hours a day on flat ground, Saint-Denis ranks joint 3rd of 14 places in Reunion for sunshine. A 1 kWp array at the best angle (19°) makes about 1,742 kWh a year here, 1% more than the average place in Reunion.

Places near Saint-Denis

All places in Reunion

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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.