Vargem Grande, Maranhão, Brazil represents an excellent location for year-round solar photovoltaic energy generation. This tropical location experiences remarkably consistent solar energy production throughout all seasons, with daily output ranging from 5.56 kWh per kilowatt of installed solar capacity in summer to an impressive 6.58 kWh per kilowatt in spring.

Seasonal Solar Performance

The location demonstrates strong solar energy potential across all meteorological seasons. Spring emerges as the peak production period, generating 6.58 kWh per day per kilowatt of installed capacity. Winter follows closely with 6.08 kWh per day per kilowatt, while autumn produces 5.85 kWh per day per kilowatt. Even during the lowest-producing season of summer, the output remains robust at 5.56 kWh per day per kilowatt. This consistent performance throughout the year makes Vargem Grande particularly attractive for solar installations, as property owners can rely on steady energy production regardless of the season. The relatively small variation between seasons - only about 18% difference between the highest and lowest producing periods - provides excellent energy security.

Optimal Installation Configuration

For fixed panel installations at this location, the ideal tilt angle to maximize total year-round solar production is 4 degrees North. This shallow tilt angle reflects the location's proximity to the equator, where the sun maintains a high position in the sky throughout the year.

Environmental and Weather Considerations

Several local factors could potentially impact solar energy production at Vargem Grande and require careful consideration during installation planning. The tropical climate brings significant rainfall during wet seasons, which can temporarily reduce solar output due to cloud cover and atmospheric moisture. However, this same rainfall provides a natural cleaning effect for solar panels, helping to maintain their efficiency by washing away dust and debris. High humidity levels common in tropical regions can accelerate corrosion of metal components and electrical connections. Additionally, the consistent warm temperatures may cause thermal stress on panels and reduce their efficiency compared to cooler climates.

Preventative Measures for Optimal Performance

Several installation strategies can help maximize solar energy production despite these environmental challenges:

• Use marine-grade or specially coated mounting hardware and electrical components designed to resist corrosion in high-humidity environments
• Ensure adequate ventilation around panels to promote air circulation and reduce heat buildup
• Install panels with proper drainage to prevent water accumulation
• Design electrical systems with enhanced weatherproofing and sealed connections
• Implement regular maintenance schedules during dry periods to address any humidity-related component degradation

Despite these considerations, the environmental factors at Vargem Grande are generally manageable with proper installation techniques. The location's strong and consistent solar resource, combined with appropriate preventative measures, makes it highly suitable for successful solar photovoltaic installations that can provide reliable renewable energy 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 Vargem Grande

Seasonal solar PV output for Latitude: -3.6009, Longitude: -43.8517 (Vargem Grande, 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 Vargem Grande, Brazil

To maximize your solar PV system's energy output in Vargem Grande, Brazil (Lat/Long -3.6009, -43.8517) 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 Vargem Grande, 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 Vargem Grande, 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	2° 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 Vargem Grande, 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 Vargem Grande, 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 Vargem Grande, Brazil

Topographical Features of Vargem Grande

The landscape around Vargem Grande in Maranhão state presents a predominantly flat to gently undulating terrain characteristic of the northeastern Brazilian interior. This region sits within the expansive Cerrado savanna ecosystem, where the topography consists mainly of broad plateaus and gentle rolling hills with elevations typically ranging from 200 to 400 meters above sea level. The area features wide open spaces with scattered vegetation, creating an environment where natural obstacles to large-scale development are minimal. The terrain exhibits excellent drainage characteristics, with seasonal streams and small rivers carving shallow valleys through the landscape. These waterways generally flow in predictable patterns without creating steep gorges or significant elevation changes that would complicate construction activities. The soil composition consists primarily of well-drained sandy and clay-based substrates that provide stable foundations for infrastructure development.

Climate and Environmental Conditions

Vargem Grande experiences a tropical savanna climate with distinct wet and dry seasons. The dry season extends from May through September, bringing clear skies and minimal precipitation, while the wet season from October through April sees increased rainfall and cloud cover. The region maintains consistently warm temperatures throughout the year, with minimal seasonal variation that supports reliable energy generation. The area benefits from relatively low humidity during the dry months and experiences gentle to moderate wind patterns that help with natural cooling of equipment. The flat topography allows unobstructed air circulation, which proves beneficial for maintaining optimal operating temperatures for solar installations.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations lie to the east and southeast of Vargem Grande, where the terrain becomes even flatter and more expansive. These areas offer vast stretches of open land with minimal existing development, allowing for the construction of utility-scale solar farms spanning several square kilometers without significant topographical constraints. The elevated plateaus found approximately 15-20 kilometers south of the town center present particularly attractive development opportunities. These locations combine the advantages of stable, well-drained ground with excellent exposure to prevailing weather patterns. The slightly higher elevation provides natural drainage benefits while maintaining the flat characteristics essential for efficient panel installation and maintenance access. Areas to the north and northwest, while still topographically suitable, contain more scattered vegetation and seasonal wetlands that might require additional environmental considerations during development planning. The western regions feature more pronounced rolling hills that, while not prohibitive, would increase construction complexity and potentially reduce overall efficiency due to shading concerns and irregular panel positioning requirements. The proximity to existing road networks and electrical transmission infrastructure makes the southeastern quadrant particularly attractive for commercial development. These areas combine optimal topographical conditions with practical access considerations, reducing both construction and operational costs for large-scale installations.

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.