Lontras, Santa Catarina, Brazil, located in the Southern Sub Tropics at coordinates -27.1821, -49.5, presents a moderately favorable location for year-round solar energy generation, though with significant seasonal variation that potential solar installers should carefully consider.

Seasonal Solar Performance

The solar energy output at Lontras varies considerably throughout the year. Summer delivers the strongest performance at 6.22 kWh per day per kW of installed solar capacity, making it the ideal season for solar generation. Spring follows as the second-best period with 4.68 kWh per day per kW, while autumn produces 4.40 kWh per day per kW. Winter presents the most challenging conditions for solar generation, dropping to just 3.22 kWh per day per kW of installed capacity. This represents nearly a 50% reduction compared to summer output, which is typical for locations in the Southern Hemisphere's subtropical regions. For fixed panel installations at this location, the optimal tilt angle to maximize total year-round solar production is 24 degrees facing North. This angle is calculated by analyzing daily solar elevation angles throughout the year and weighting them according to solar irradiance data to achieve the best annual average performance.

Environmental and Weather Factors

Several local factors in the Lontras region can potentially impact solar energy production:

• High humidity and frequent rainfall: The subtropical climate brings substantial moisture, which can reduce solar irradiance and create more frequent cloud cover, particularly during summer months when thunderstorms are common
• Fog formation: Morning fog is typical in this region, especially during cooler months, which can delay the start of effective solar generation each day
• Dust and pollen accumulation: The region's vegetation and agricultural activities can lead to faster accumulation of debris on solar panels
• Hail risk: Severe weather events including hail storms can occur, particularly during the warmer months

Preventative Measures for Optimal Performance

To maximize solar energy production despite these challenges, several installation strategies should be considered: Regular cleaning schedules become particularly important in this environment. Installing panels with adequate spacing and tilt helps promote natural cleaning from rainfall while preventing debris accumulation. The recommended 24-degree tilt angle also assists with self-cleaning during rain events. Choosing high-quality panels with robust weather sealing and impact-resistant glass provides protection against hail and moisture infiltration. Anti-reflective coatings can help maintain performance even when atmospheric conditions reduce direct sunlight. Installing monitoring systems allows for quick identification of performance drops due to weather-related issues. Proper drainage around the installation site prevents water pooling that could create localized humidity problems. While Lontras offers reasonable solar potential, the significant seasonal variation means that energy storage or grid-tied systems with net metering become particularly valuable for maintaining consistent energy supply throughout the year. The location's subtropical climate requires more attention to maintenance and weather protection compared to drier regions, but with proper installation techniques, solar PV systems can still provide effective renewable energy generation.

Note: The Southern Sub Tropics extend from -23.5° latitude South down to -35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 3161 locations across Brazil. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Brazil by location

Solar output per kW of installed solar PV by season in Lontras

Seasonal solar PV output for Latitude: -27.1821, Longitude: -49.5 (Lontras, Brazil), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:

 

Ideally tilt fixed solar panels 24° North in Lontras, Brazil

To maximize your solar PV system's energy output in Lontras, Brazil (Lat/Long -27.1821, -49.5) throughout the year, you should tilt your panels at an angle of 24° North for fixed panel installations.

As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.

We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.

Seasonally adjusted solar panel tilt angles for Lontras, Brazil

If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Lontras, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 24° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
11° North in Summer	33° North in Autumn	43° North in Winter	20° North in Spring

Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.

This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.

Calculate solar panel row spacing in Lontras, Brazil

We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Lontras, Brazil.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. Minimum Spacing:
   We add the shadow length to the horizontal space occupied by tilted panels.

This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.

Topography for solar PV around Lontras, Brazil

Topographical Features of the Lontras Region

The area surrounding Lontras in Santa Catarina state sits within Brazil's Atlantic Forest region, characterized by rolling hills and moderate elevation changes typical of the Serra Geral mountain system's foothills. The landscape features a mix of gentle slopes and steeper inclines, with elevations ranging from approximately 400 to 800 meters above sea level throughout the broader region. The terrain exhibits the classic undulating patterns common to southern Brazil's highland areas, where ancient geological formations have been shaped by millions of years of erosion. River valleys cut through the landscape, creating natural drainage patterns that flow eastward toward the Atlantic Ocean. The Itajaí River system influences much of the regional topography, with numerous tributaries creating smaller valleys and ridgelines throughout the area. Dense Atlantic Forest once covered this entire region, though much has been cleared for agriculture and urban development over the past century. The remaining forested areas tend to occupy the steeper slopes and ridge tops, while flatter areas have been converted to pastureland, crop production, and settlements.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations would be the broader valley floors and gentle hillsides with southern exposure, taking advantage of Brazil's position in the Southern Hemisphere where north-facing slopes receive less direct sunlight. The relatively flat agricultural areas that extend eastward and westward from Lontras offer the best combination of accessible terrain and minimal shading obstacles. Areas with gradual slopes of less than 15 degrees would be ideal for large solar arrays, as they provide adequate drainage while minimizing the need for extensive grading or specialized mounting systems. The agricultural zones that have already been cleared of native forest present opportunities for solar development without additional environmental impact from deforestation. The elevated plateaus found throughout the region, particularly those at 500-700 meter elevations, offer advantages including cooler operating temperatures for solar panels and reduced atmospheric interference. These higher elevations often experience better air circulation, which helps maintain optimal panel performance. Transportation infrastructure represents another crucial factor, with areas near major highways and existing electrical transmission lines being most practical for large-scale development. The flatter terrain closer to established road networks would significantly reduce installation and maintenance costs compared to more remote or topographically challenging locations.

Brazil solar PV Stats as a country

Brazil ranks 13th in the world for cumulative solar PV capacity, with 13,708 total MW's of solar PV installed. This means that 2.50% of Brazil's total energy as a country comes from solar PV (that's 31st in the world). Each year Brazil is generating 64 Watts from solar PV per capita (Brazil ranks 47th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Brazil?

Yes, there are several incentives for businesses wanting to install solar energy in Brazil. The Brazilian government offers a range of tax credits and other financial incentives to encourage the adoption of renewable energy sources such as solar power. These include reduced import taxes on solar equipment, accelerated depreciation of investments in renewable energy projects, and preferential financing from public banks. Additionally, some states offer additional incentives such as subsidies or grants for businesses that install solar systems.

Do you have more up to date information than this on incentives towards solar PV projects in Brazil? Please reach out to us and help us keep this information current. Thanks!

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Compare this location to others worldwide for solar PV potential

The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.

However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.

Helping you assess viability of solar PV for your site

Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide

Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.