Solarposition.org

Santa Catarina · Brazil · 27.70° S · 48.53° W

Solar position in Ribeirão da Ilha

Sun position, daylight and the best solar panel angle for Ribeirão da Ilha — computed for 27.70° S, 48.53° W, 2 m above sea level.

Sunrise today05:29104° ESE
Sunset today18:27256° WSW
Best panel angle25°year-round, facing north
Off-grid angle50°best for the darkest month

The sun right now

Azimuth180.0°
Elevation74.2°
At solar noon, 11:58Open on the sun map

Sun in Ribeirão da Ilha today

Saturday, 24 October 2026 · local time UTC−3

EventTimeDirection / height
Astronomical dawn04:07sun 18° below horizon
Nautical dawn04:3612° below
Civil dawn05:056° below
Sunrise05:29104° ESE
Golden hour ends06:00sun 6° up
Solar noon11:5874.2° high
Golden hour starts17:56sun 6° up
Sunset18:27256° WSW
Civil dusk18:516° below
Nautical dusk19:2012° below
Astronomical dusk19:5018° below
Day length12 h 58 min

Sun path diagram for Ribeirão da Ilha

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 solstice678910111213141516171819Today
  • June solstice
  • Equinox
  • December solstice
  • Today

On the June solstice the sun reaches 38.9° at solar noon in Ribeirão da Ilha; on the December solstice only 85.7°. Sunrise swings from 64° ENE in June to 117° ESE in December — a 53° 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
January05:3712:2519:1313 h 35 min82.1°
February06:0112:2718:5312 h 52 min72.7°
March06:1812:2118:2312 h 06 min61.9°
April06:3412:1217:5011 h 16 min50.3°
May06:5112:1017:2910 h 39 min42.0°
June07:0412:1517:2710 h 23 min38.9°
July07:0112:2017:3910 h 38 min41.9°
August06:3912:1717:5511 h 17 min50.4°
September06:0412:0718:0912 h 05 min61.8°
October05:3211:5818:2512 h 54 min73.2°
November05:1112:0018:4813 h 36 min82.3°
December05:1512:1219:0913 h 54 min85.7°

A year of daylight in Ribeirão da Ilha

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 Ribeirão da Ilha

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

25°collects the most energy over a year: 1386 kWh per kWp.

50°gives the most in the darkest month — the one an off-grid system is sized for.

30%40%50%60%70%80%90%100%0°10°20°30°40°50°60°70°80°90°Best year-round 25°Best worst-month 50°70°Yearly energyWorst-month energy
  • Yearly energy
  • Worst-month energy
TiltkWh/kWp per yearShare of best yearJune kWh/kWp/dayBest ÷ worst month
0°127992%2.102.3×
15°136999%2.661.8×
25° year-round best1386100%2.941.5×
28° = latitude1384100%3.011.4×
30°1381100%3.051.4×
45°131495%3.251.2×
50° off-grid best127592%3.281.2×
60°117485%3.261.3×
70°104675%3.151.6×
90°73753%2.692.4×

A fixed array in Ribeirão da Ilha produces the most over a year at 25°. The design month for an off-grid system is June: at 50° it makes 3.28 kWh per kWp a day, 12% more than at 25°, and costs 8% of the yearly total. Why steep panels win winter.

Off-grid solar in Ribeirão da Ilha at 70°

Daily energy of 1 kWp by month. Bars: panels at 70°. Line: panels at 25° (year-round best).

012345January: 2.29 (70°)2.3JanFebruary: 2.71 (70°)2.7FebMarch: 3.16 (70°)3.2MarApril: 3.42 (70°)3.4AprMay: 3.26 (70°)3.3MayJune: 3.15 (70°)3.2JunJuly: 3.22 (70°)3.2JulAugust: 3.30 (70°)3.3AugSeptember: 2.82 (70°)2.8SepOctober: 2.55 (70°)2.6OctNovember: 2.35 (70°)2.3NovDecember: 2.15 (70°)2.2Dec25°
MonthSun hours, flatSun hours at 70°kWh/kWp/day at 70°at 25°Mean temp.
January5.972.832.294.4324.8 °C
February5.573.322.714.4125.0 °C
March4.913.863.164.2424.4 °C
April3.954.133.423.8122.6 °C
May3.063.893.263.2219.7 °C
June2.653.733.152.9417.9 °C
July2.803.813.223.0716.8 °C
August3.433.903.303.4917.3 °C
September3.873.372.823.5218.3 °C
October4.593.082.553.8020.1 °C
November5.642.862.354.3221.5 °C
December5.942.652.154.3623.3 °C
Year4.36 avg3.45 avg1046 kWh1386 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 550 Wp of panels at 70°, versus 400 Wp at 25°. Here the lower tilt is the better winter choice — the sun stays high enough. Size your own system.

Row spacing in Ribeirão da Ilha

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.

3.3 mrow pitch at 70°

3.0 mrow pitch at 25°

Row spacing calculator

How Ribeirão da Ilha compares in Brazil

Against the other 2,263 places in Brazil with climate data, for a fixed array at its best angle.

2174thof 2,264 places in Brazil for sunshine, shared: 4.36 peak sun hours a day on flat ground.

−12%solar energy a year compared with the average place in Brazil: 1,386 against 1,581 kWh per kWp.

+18 mindaylight on the longest day, compared with São Paulo: 13 h 54 min against 13 h 35 min.

25°best year-round tilt here; across Brazil it runs from 0° in Macapá to 28° in Santa Vitória do Palmar.

Of the 2,264 places in Brazil, Catolé do Rocha gets the most sun (6.16 peak sun hours a day) and Paranaguá the least (4.01); Ribeirão da Ilha ranks joint 2174th. In its darkest month, December, 1 kWp of off-grid panels at 70° makes 2.15 kWh a day here, against 1.56 kWh on average in Brazil. The shortest day lasts 10 h 23 min, −18 min compared with São Paulo.

The sunniest places in Brazil

Solar forecast for Ribeirão da Ilha, 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 Ribeirão da Ilha

What is the best solar panel angle in Ribeirão da Ilha?
For a fixed array facing north, the best year-round tilt in Ribeirão da Ilha is 25°, worth about 1386 kWh per kWp a year. An off-grid system that has to get through June does better at about 50°.
What time is sunrise and sunset in Ribeirão da Ilha today?
On 24 October 2026 the sun rises at 05:29 and sets at 18:27 local time (UTC−3), giving 12 h 58 min of daylight. Solar noon is at 11:58.
How many peak sun hours does Ribeirão da Ilha get?
On a flat surface 4.4 hours a day averaged over the year, from 2.6 in June to 6.0 in January. Panels tilted at 70° receive 2.6 sun hours a day in December.
How high does the sun get in Ribeirão da Ilha?
At solar noon the sun stands 38.9° above the horizon on the June solstice and 85.7° on the December solstice.
Is Ribeirão da Ilha a good place for solar panels?
With 4.4 peak sun hours a day on flat ground, Ribeirão da Ilha ranks joint 2174th of 2,264 places in Brazil for sunshine. A 1 kWp array at the best angle (25°) makes about 1,386 kWh a year here, 12% less than the average place in Brazil.

Places near Ribeirão da Ilha

All places in Brazil

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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.