Pau d'Arco, Brazil offers excellent conditions for year-round solar energy generation, making it a highly suitable location for solar PV installations. Located in the tropics at coordinates -7.7411, -50.1494, this region benefits from consistent sunlight throughout the year with seasons characterized more by wet and dry periods than temperature variations.

Solar Energy Output Performance

The solar energy output data reveals that Pau d'Arco performs exceptionally well across all seasons. Winter emerges as the peak season for solar generation, producing 6.28kWh per day per kW of installed solar capacity. Spring follows as the second-best performing season at 5.63kWh/day per kW, while autumn generates 5.24kWh/day per kW. Even summer, the lowest-producing season, still delivers a robust 5.05kWh/day per kW. This seasonal pattern is typical for tropical locations in the Southern Hemisphere, where the dry winter months often provide the clearest skies and optimal solar conditions. The relatively small variation between seasons (only about 24% difference between the highest and lowest months) demonstrates the location's reliability for consistent solar energy production throughout the year.

Optimal Panel Configuration

For maximum year-round solar production at Pau d'Arco, fixed solar panels should be tilted at 9 degrees toward the north. This shallow angle optimization accounts for the location's proximity to the equator and ensures the panels capture the maximum amount of solar irradiance across all seasons.

Environmental and Weather Challenges

Several local factors could potentially impact solar energy production at this location:

• Heavy rainfall during wet season: Tropical regions experience intense rainfall periods that can reduce solar irradiance and create cloud cover
• High humidity levels: Persistent moisture in the air can affect panel efficiency and create maintenance challenges
• Dust and debris accumulation: Dry periods may lead to dust buildup on panel surfaces
• Vegetation growth: Fast-growing tropical vegetation could create shading issues if not properly managed

Preventative Measures for Optimal Performance

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

• Elevated mounting systems: Install panels well above ground level to minimize shading from vegetation and improve air circulation
• Regular cleaning schedules: Establish frequent panel cleaning routines, particularly during dry seasons when dust accumulation is highest
• Proper drainage design: Ensure mounting systems allow efficient water runoff during heavy rains
• Vegetation management: Maintain clear zones around solar installations and regularly trim nearby plants
• Quality sealing: Use high-grade weatherproofing to protect electrical components from humidity and moisture

Despite these potential challenges, Pau d'Arco's consistently high solar output numbers across all seasons indicate that with proper installation and maintenance practices, this location offers excellent potential for reliable solar energy generation throughout the year.

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 Pau d'Arco, Pará

Seasonal solar PV output for Latitude: -7.7411, Longitude: -50.1494 (Pau d'Arco, Pará, 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 9° North in Pau d'Arco, Pará, Brazil

To maximize your solar PV system's energy output in Pau d'Arco, Pará, Brazil (Lat/Long -7.7411, -50.1494) throughout the year, you should tilt your panels at an angle of 9° 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 Pau d'Arco, Pará, 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 Pau d'Arco, Pará, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 9° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
8° South in Summer	15° North in Autumn	23° North in Winter	2° 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 Pau d'Arco, Pará, 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 Pau d'Arco, Pará, 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 Pau d'Arco, Pará, Brazil

Topography Around Pau d'Arco

Pau d'Arco is located in the state of Pará in northern Brazil, positioned within the vast Amazon Basin region. The area sits at a relatively low elevation, typically ranging between 200 to 400 meters above sea level. The terrain is characterized by gently rolling hills and broad, flat valleys that are typical of the Brazilian Shield's northern edge where it transitions into the Amazon lowlands.

The landscape around Pau d'Arco features a mix of natural savanna grasslands known as cerrado, alongside areas that have been converted to agricultural use, particularly cattle ranching and soybean cultivation. The region experiences a gradual topographical transition from the higher plateau areas to the south toward the lower-lying Amazon floodplains to the north and east.

Drainage patterns in the area are dominated by tributaries of the Xingu River system, with numerous small streams and seasonal watercourses creating a network of shallow valleys. During the wet season, some lower-lying areas may experience temporary flooding, while the higher ground remains well-drained throughout the year.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations around Pau d'Arco would be the elevated plateau areas to the south and southwest of the town. These areas offer several advantages including stable, well-drained soils that reduce foundation and maintenance challenges. The gentle slopes in these regions, typically ranging from 1 to 5 degrees, provide excellent conditions for solar panel installation while allowing for natural drainage.

The cleared agricultural lands and pasture areas present particularly attractive opportunities for solar development. These locations have already been modified from their natural state, reducing environmental impact concerns while offering large, relatively flat expanses suitable for utility-scale installations. The existing road infrastructure serving these agricultural areas would also facilitate construction and ongoing maintenance access.

Areas closer to the Xingu River tributaries and their associated floodplains should generally be avoided for solar installations due to seasonal flooding risks and potentially unstable soils. The higher elevation zones, particularly those above 300 meters elevation, offer the best combination of stable ground conditions, good drainage, and minimal flood risk.

The region's position within the cerrado ecosystem transition zone means that many areas have naturally sparse tree cover, reducing land clearing requirements compared to denser forest regions. This characteristic, combined with the area's relatively flat to gently rolling topography, makes the Pau d'Arco region well-suited for large-scale solar development when appropriate sites are selected.

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.