Solar Energy Potential in Viana, Maranhão, Brazil

Viana, Maranhão, Brazil, located at latitude -3.1957 and longitude -45.0074, offers excellent conditions for solar photovoltaic (PV) energy generation throughout the year. This tropical location benefits from remarkably consistent sunlight across all seasons, making it an exceptional site for solar energy production. The solar energy output in Viana demonstrates remarkable stability across the meteorological seasons. During summer, each kilowatt of installed solar capacity generates approximately 5.27 kWh per day. This production increases slightly in autumn to 5.70 kWh/day, and further improves during winter with 5.85 kWh/day. Spring offers the highest production at 5.88 kWh/day per kilowatt of installed capacity. What makes Viana particularly notable for solar energy is the minimal variation between seasonal outputs. Unlike locations in higher latitudes that experience dramatic seasonal fluctuations in solar production, Viana's tropical position ensures relatively consistent energy generation year-round. The difference between the highest producing season (spring) and the lowest (summer) is merely 0.61 kWh/day per kilowatt installed.

Optimal Panel Installation

For fixed solar panel installations in Viana, Maranhão, the ideal tilt angle to maximize year-round energy production is 4 degrees facing North. This slight tilt optimizes exposure to the sun's path throughout the year, accounting for the location's proximity to the equator and the Earth's elliptical orbit. The most productive periods for solar generation in Viana occur during spring and winter, though the differences between seasons are minimal. This consistency makes Viana an ideal location for solar projects that require dependable energy output throughout the year, without significant seasonal adjustments or compensations.

Environmental Considerations

Despite Viana's excellent solar potential, there are environmental factors that could affect solar production. The tropical climate brings heavy seasonal rains, particularly during the wet season. These conditions can temporarily reduce solar efficiency due to cloud cover and potential accumulation of dirt or debris on panels. To mitigate these challenges, solar installations in Viana should incorporate:

• Regular cleaning schedules to remove dust and debris, especially after the dry season when dust accumulation is highest
• Slightly steeper tilt angles than the mathematical optimum (perhaps 5-10 degrees) to promote self-cleaning during rainstorms
• High-quality waterproof junction boxes and connections designed for tropical conditions
• Lightning protection systems, as tropical regions often experience frequent electrical storms
• Humidity-resistant components to prevent degradation in the tropical environment

Additionally, considering elevated mounting systems may be beneficial to reduce the impact of potential flooding during intense tropical downpours and to improve airflow beneath the panels, helping to maintain optimal operating temperatures in the warm tropical climate.

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 Viana

Seasonal solar PV output for Latitude: -3.1957, Longitude: -45.0074 (Viana, 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 Viana, Brazil

To maximize your solar PV system's energy output in Viana, Brazil (Lat/Long -3.1957, -45.0074) 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 Viana, 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 Viana, 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
13° 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 Viana, 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 Viana, 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 Viana, Brazil

The region surrounding Viana, located in Maranhão state in northeastern Brazil, presents a diverse topographical landscape characterized by gently rolling terrain interspersed with flatter areas. This municipality sits in the transition zone between the Amazon basin and the northeastern Brazilian highlands, creating a unique geographical setting with varied elevations and landforms. The immediate vicinity of Viana features relatively flat lowlands with occasional undulating hills. The area is part of the greater Baixada Maranhense, a vast region of floodplains, lakes, and marshes that undergo seasonal flooding during the rainy season. These lowlands are punctuated by modest elevations that rarely exceed 100 meters above sea level, creating a predominantly flat to gently rolling landscape.

Hydrography and Its Impact on Topography

Water features significantly influence the local topography. Viana is situated near the Pindaré River basin, with numerous smaller waterways, lakes, and seasonal wetlands dotting the landscape. These hydrological features have shaped the terrain through erosion and sediment deposition over millennia, resulting in the characteristic lowland topography with occasional higher ground. The seasonal nature of rainfall in this region means that certain areas transform dramatically between wet and dry seasons, affecting not only the visible landscape but also land stability and accessibility.

Vegetation and Land Cover

The natural vegetation transitions between Amazon rainforest elements and the more drought-resistant cerrado (savanna) formations. However, much of the original vegetation has been modified through human activities, primarily agriculture and cattle ranching, which have created a patchwork of cleared lands, secondary growth, and cultivated areas. This altered landscape features open areas with good solar exposure, particularly in the zones that have been cleared for agricultural purposes. These anthropogenic changes have inadvertently created conditions that may be favorable for solar energy development.

Optimal Areas for Solar PV Development

For large-scale solar photovoltaic installations, the most suitable areas near Viana would be the higher elevation zones that remain dry year-round. These areas typically include: The elevated plateaus and gentle hills located to the east and southeast of Viana offer ideal conditions for solar installations. These locations benefit from stable ground conditions, minimal flooding risk, and good exposure to sunlight throughout the year. The cleared agricultural lands that are not subject to seasonal inundation present excellent opportunities for solar development. These areas already have reduced vegetation cover, minimizing the environmental impact of new installations while providing the open space necessary for large arrays. Areas with proximity to existing transmission infrastructure are particularly advantageous. While the topography around Viana is generally favorable for solar development in terms of terrain, the practical consideration of connecting to the grid makes locations near existing power lines especially valuable. The drier, more elevated regions between Viana and neighboring municipalities like Pindaré-Mirim and Santa Inês merit special consideration. These areas combine favorable topography with relatively good transportation access, facilitating both construction and maintenance of solar facilities. It's worth noting that while the lowland areas may seem appealing due to their flatness, the seasonal flooding patterns make them less suitable for permanent infrastructure like solar arrays. The ideal locations combine moderate elevation, minimal flood risk, and open exposure without requiring extensive forest clearing, thus balancing environmental considerations with optimal energy production potential.

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

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