Cajari, Maranhão, Brazil presents an excellent location for year-round solar photovoltaic energy generation. Located in the tropical zone at coordinates -3.384, -45.0231, this area benefits from consistent sunlight throughout the year, with energy production varying only modestly between seasons.

Solar Energy Production Performance

The solar energy output at Cajari demonstrates remarkably stable performance across all seasons. Summer produces 5.27 kWh per day per kW of installed solar capacity, while autumn shows improved performance at 5.70 kWh/day. Winter and spring deliver the highest outputs at 5.85 kWh/day and 5.88 kWh/day respectively. This seasonal pattern is typical for tropical locations, where the sun's position varies less dramatically throughout the year compared to higher latitudes. The slightly higher production during winter and spring months makes these the ideal times for maximum solar generation at this location.

Optimal Panel Configuration

For fixed panel installations at Cajari, Maranhão, the ideal tilt angle to maximize total year-round solar production is 4 degrees facing North. This shallow angle reflects the location's proximity to the equator, where panels perform best when positioned nearly flat to capture the high-angle sun throughout most of the year.

Environmental and Weather Challenges

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

• High humidity and frequent rainfall - Tropical climates experience intense wet seasons that can reduce solar irradiance and create maintenance challenges
• Dust and debris accumulation - Dry periods followed by heavy rains can leave mineral deposits and organic matter on panel surfaces
• Extreme heat - Tropical temperatures can reduce panel efficiency and accelerate equipment degradation
• Vegetation growth - Rapid plant growth in tropical climates can create shading issues if not properly managed

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies prove effective. Proper drainage systems and adequate panel spacing prevent water accumulation and improve air circulation for cooling. Installing panels with sufficient ground clearance allows for easier cleaning access and reduces vegetation interference. Regular maintenance schedules become crucial in tropical environments. Implementing automated cleaning systems or planning frequent manual cleaning helps maintain optimal panel performance. Choosing high-quality mounting hardware rated for tropical conditions, including corrosion-resistant materials, ensures long-term system reliability. Strategic site preparation, including vegetation management and creating clear zones around installations, prevents future shading issues. Additionally, selecting solar panels and inverters specifically rated for high-temperature operation helps maintain efficiency during peak heat periods common in tropical Brazil.

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 Cajari

Seasonal solar PV output for Latitude: -3.384, Longitude: -45.0231 (Cajari, 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 4° North in Cajari, Brazil

To maximize your solar PV system's energy output in Cajari, Brazil (Lat/Long -3.384, -45.0231) throughout the year, you should tilt your panels at an angle of 4° 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 Cajari, 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 Cajari, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 4° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
12° South in Summer	10° North in Autumn	19° North in Winter	3° South 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 Cajari, 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 Cajari, 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 Cajari, Brazil

Topographical Features of the Cajari Region

The area around Cajari in Brazil sits within the expansive Amazon Basin, characterized by relatively flat to gently undulating terrain typical of the northern Maranhão state. This region forms part of the vast lowland plains that extend across much of the Amazon watershed, with elevations generally remaining below 200 meters above sea level. The landscape consists primarily of sedimentary formations that have been shaped by ancient river systems and ongoing fluvial processes.

The topography is dominated by broad, shallow valleys interspersed with low ridges and gentle slopes. These features create a rolling countryside rather than dramatic elevation changes, making the terrain generally accessible and suitable for various development purposes. The area experiences seasonal flooding in some lower-lying zones due to its position within the greater Amazon floodplain system, though much of the higher ground remains well-drained throughout the year.

Dense tropical rainforest covers significant portions of the region, though areas of cleared land exist where agricultural activities and settlements have been established. The forest canopy creates a complex microclimate that influences local weather patterns and soil conditions. Rivers and tributaries wind through the landscape, creating natural boundaries and affecting drainage patterns across the region.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations would be the elevated plateaus and ridge tops that rise above the immediate floodplain areas. These higher elevations provide several advantages including better drainage, reduced risk of seasonal inundation, and typically clearer atmospheric conditions due to their position above the forest canopy humidity.

Previously cleared agricultural lands on these elevated areas would represent ideal candidates for solar development, as they already have established access routes and reduced environmental impact concerns compared to forested areas. The gentle slopes found on many of these sites would facilitate efficient panel installation and maintenance access while providing natural drainage for the installations.

Areas located at least several kilometers inland from major rivers would be preferable to avoid flood-prone zones and the higher humidity levels typically found in riparian environments. The slightly drier conditions found on the interfluves between river systems would also help reduce potential issues with equipment corrosion and maintenance requirements in this tropical climate.

Open grassland areas or existing pasture lands on stable, well-drained soils would offer additional opportunities for solar development. These locations typically feature firm ground conditions suitable for supporting large installations while avoiding the complexities associated with forest clearing. The relatively flat nature of much of the terrain would allow for efficient layout of solar arrays with minimal grading requirements.

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.