Duartina, São Paulo, Brazil presents a reasonably good location for year-round solar energy generation, though it experiences notable seasonal variations in output. Located in the tropical region of Brazil, this area benefits from consistent sunlight throughout most of the year, with seasons typically characterized by wet and dry periods rather than the temperature extremes found in other climates.

Seasonal Solar Performance

The solar energy output at Duartina varies significantly across the seasons. Summer delivers the highest production at 6.97 kWh per day per kW of installed solar capacity, making it the ideal time for solar generation. Spring follows as the second-best season with 6.27 kWh per day per kW, while autumn drops to 5.58 kWh per day per kW. Winter presents the lowest output at 4.74 kWh per day per kW, representing about 32% less energy production compared to summer peak performance. For optimal year-round energy capture, solar panels at this location should be installed with a fixed tilt angle of 20 degrees facing north. This angle has been calculated to maximize total annual solar output by accounting for the sun's position throughout the year and weighting for actual solar irradiance data.

Environmental and Weather Challenges

Several local factors could potentially impact solar energy production in Duartina. The tropical climate brings distinct wet and dry seasons, with the wet season likely contributing to the reduced winter output through increased cloud cover and atmospheric moisture. Heavy rainfall during wet periods can temporarily reduce solar panel efficiency and may cause issues with water accumulation if drainage systems are inadequate. High humidity levels common in tropical regions can lead to increased soiling of solar panels from dust, pollen, and organic matter that adheres more readily to surfaces in moist conditions. Additionally, the consistent warmth and humidity create ideal conditions for vegetation growth, which could lead to shading issues if not properly managed during installation planning and ongoing maintenance.

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies should be considered:

• Install panels with adequate spacing and proper drainage systems to prevent water pooling and ensure efficient runoff during heavy rains
• Implement regular cleaning schedules, particularly during and after the wet season, to remove accumulated dirt, organic matter, and mineral deposits
• Ensure proper site preparation with vegetation management and ongoing landscaping maintenance to prevent shading from growing plants and trees
• Use mounting systems that promote good air circulation around panels to help reduce the impact of high humidity and temperature on panel efficiency
• Consider anti-soiling coatings or self-cleaning panel technologies that can reduce maintenance requirements in high-humidity environments

Despite these considerations, Duartina's location offers reasonably consistent solar energy potential throughout the year, with even the lowest-producing winter season still delivering nearly 5 kWh per day per kW of installed capacity. The 47% increase in output from winter to summer provides opportunities for seasonal energy planning and demonstrates the location's overall viability for solar energy projects.

Note: The Tropics are located between 23.5° North and -23.5° South of the equator.

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 Duartina

Seasonal solar PV output for Latitude: -22.4027, Longitude: -49.4189 (Duartina, 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 20° North in Duartina, Brazil

To maximize your solar PV system's energy output in Duartina, Brazil (Lat/Long -22.4027, -49.4189) throughout the year, you should tilt your panels at an angle of 20° 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 Duartina, 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 Duartina, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 20° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
6° North in Summer	28° North in Autumn	38° North in Winter	16° 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 Duartina, 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 Duartina, 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 Duartina, Brazil

Topographical Features of the Duartina Region

Duartina sits within the interior plateau region of São Paulo state, characterized by gently rolling hills and relatively modest elevation changes. The landscape around this municipality features undulating terrain with elevations typically ranging between 400 to 600 meters above sea level. This area forms part of the broader Paulista Plateau, which extends across much of the state's interior and creates a generally stable geological foundation.

The topography consists primarily of gentle slopes and broad valleys carved by small tributaries that eventually feed into larger river systems. The terrain rarely presents steep gradients or dramatic elevation changes, instead offering a series of low hills separated by shallow depressions. This rolling countryside is typical of the weathered crystalline basement rocks that underlie much of São Paulo's interior, creating soils that support both agriculture and potential infrastructure development.

Drainage patterns in the region follow the natural contours of these gentle hills, with small streams meandering through the valleys before joining larger watercourses. The relatively low relief means that water flow is generally moderate, and flooding risks are typically minimal except during exceptional rainfall events.

Optimal Areas for Large-Scale Solar Development

The gently sloping hillsides south and southeast of Duartina present excellent opportunities for large-scale solar photovoltaic installations. These areas offer natural south-facing slopes that would maximize solar exposure throughout the day while providing adequate drainage to prevent water accumulation around equipment. The moderate gradients in these locations would require minimal grading work, reducing installation costs and environmental impact.

The broader valley floors and plateau areas northwest of the municipality also show strong potential for solar development. These relatively flat expanses provide large contiguous areas suitable for extensive solar arrays, with gentle undulations that can be easily accommodated in modern solar farm design. The stable geology and good drainage characteristics of these areas would support heavy equipment access during construction and ongoing maintenance operations.

Areas with slightly elevated positions, particularly the low ridgelines running roughly east-west through the region, offer additional advantages for solar installations. These locations typically experience better air circulation, which helps maintain optimal operating temperatures for photovoltaic panels. The elevated positions also tend to have fewer issues with morning fog or mist that can occasionally affect lower-lying areas.

The existing agricultural lands surrounding Duartina, particularly those with minimal slope variations, represent prime candidates for solar development due to their accessibility and relatively undisturbed nature. These areas already have established road networks and utility infrastructure that could support large-scale renewable energy projects with minimal additional investment in access routes or grid connections.

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!

Citation Guide

Article Details for Citation

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

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.