Rio Vermelho, Minas Gerais, Brazil, located in the tropics at latitude -18.2687 and longitude -43.0742, offers favorable conditions for solar PV energy generation throughout the year. This location benefits from its tropical setting, where sunlight remains relatively consistent across seasons, which are primarily distinguished by wet and dry periods rather than significant temperature variations.

The solar energy production potential at Rio Vermelho demonstrates good year-round performance with some seasonal variation. Summer yields the highest output at 6.00 kWh per day for each kilowatt of installed capacity. Spring follows closely with 5.81 kWh/day, while autumn produces 5.60 kWh/day. Winter shows the lowest but still substantial generation at 4.95 kWh/day per kilowatt installed.

Seasonal Variations

The data reveals that Rio Vermelho experiences approximately 21% higher solar production in summer compared to winter months. This relatively modest seasonal variation is advantageous compared to locations at higher latitudes, where winter production can drop dramatically. The consistent year-round performance makes this location suitable for solar installations that need to provide reliable power throughout the year.

For fixed solar panel installations at this location, the ideal tilt angle to maximize year-round energy production is 17 degrees facing North. This specific angle has been calculated to optimize the capture of available sunlight throughout the year, accounting for the Earth's elliptical orbit and the site's tropical latitude.

Environmental Considerations

Several environmental factors could potentially impact solar production at this location. The tropical climate of Rio Vermelho brings seasonal heavy rainfall, particularly during the wet season, which can temporarily reduce solar output due to cloud cover. Additionally, the region may experience occasional dust storms during dry periods, which can coat panels and reduce efficiency.

To mitigate these challenges, solar installations should incorporate:

• Regular cleaning schedules, especially during the dry season when dust accumulation is more likely
• Slightly steeper panel angles than the optimal 17 degrees in areas prone to dust buildup to facilitate natural cleaning during rainfall
• High-quality inverters capable of optimizing production during partial cloud cover conditions
• Lightning protection systems, as tropical storms can be intense in this region

The tropical location also means higher ambient temperatures, which can reduce PV panel efficiency. Using panels with good temperature coefficients and ensuring adequate airflow beneath the array can help maintain optimal performance during hot periods.

Despite these considerations, Rio Vermelho's consistent solar resource makes it an excellent candidate for solar PV installations, with annual average daily production exceeding 5.5 kWh per kilowatt installed, providing a reliable renewable energy source 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 Rio Vermelho

Seasonal solar PV output for Latitude: -18.2687, Longitude: -43.0742 (Rio Vermelho, 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 17° North in Rio Vermelho, Brazil

To maximize your solar PV system's energy output in Rio Vermelho, Brazil (Lat/Long -18.2687, -43.0742) throughout the year, you should tilt your panels at an angle of 17° 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 Rio Vermelho, 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 Rio Vermelho, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 17° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
2° North in Summer	24° North in Autumn	34° North in Winter	13° 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 Rio Vermelho, 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 Rio Vermelho, 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 Rio Vermelho, Brazil

The topography around Rio Vermelho in the state of Minas Gerais, Brazil presents a diverse and challenging landscape characterized by significant variations in elevation. The region sits within the Serra do Espinhaço mountain range, a prominent geological formation that runs north-south through eastern Brazil. This mountainous terrain creates a complex topographical profile with numerous valleys, ridges, and plateaus scattered throughout the area. The immediate vicinity of Rio Vermelho features moderately elevated terrain with numerous rolling hills interspersed with steeper slopes and occasional flat plateaus. Elevations in this region typically range from approximately 700 to 1,200 meters above sea level, creating a landscape that alternates between gentle inclines and more pronounced gradients. The area is also marked by numerous waterways, including the Rio Vermelho (Red River) itself, which carve valleys through the otherwise hilly terrain.

Surrounding Topographical Features

Moving outward from Rio Vermelho, the terrain becomes increasingly varied. To the east, the landscape rises more dramatically as it approaches the higher portions of the Serra do Espinhaço, with some peaks exceeding 1,500 meters. These eastern highlands are characterized by steeper slopes, rocky outcroppings, and narrower valleys, making much of this area less suitable for large-scale development projects. To the west, the terrain gradually becomes less pronounced, transitioning toward the broader valleys and gentler slopes that eventually connect to the São Francisco River basin. This western zone features more extensive plateau areas interspersed with rolling hills, creating pockets of relatively flat terrain that extend for several kilometers in places. The northern and southern approaches to Rio Vermelho maintain the characteristic undulating landscape of the region, with a mix of hills, small plateaus, and valley systems. Throughout the entire area, the terrain is dissected by a network of streams and rivers that have shaped the landscape over millennia, creating natural drainage patterns that follow the contours of the land.

Optimal Areas for Solar PV Development

For large-scale solar photovoltaic installations, the most suitable areas near Rio Vermelho would be the more extensive plateau regions primarily found to the west and southwest of the town. These areas offer several advantages for solar development: The plateaus provide relatively flat terrain spanning several square kilometers, which reduces the need for extensive grading and earthworks during construction. This flat topography also minimizes shading issues between solar arrays, allowing for more efficient placement and orientation of panels. Many of these plateau regions feature sparse vegetation compared to the more densely forested slopes and valleys, potentially reducing environmental impact and land clearing requirements. The slightly lower elevation of these western plateaus (typically 700-900 meters) may also reduce exposure to extreme weather conditions sometimes experienced at higher elevations. Additionally, several areas approximately 15-20 kilometers to the southwest of Rio Vermelho feature broad, gently sloping terrain with favorable north-facing aspects. These locations would receive consistent solar exposure throughout the day while still offering the practical advantages of relatively flat construction sites. The areas to avoid for solar development would include the steeper eastern slopes approaching the Serra do Espinhaço highlands, the narrow river valleys throughout the region, and any heavily forested zones. These areas present challenges related to limited space, difficult construction conditions, potential for erosion, and greater environmental impacts. The ideal solar PV locations would also need to balance proximity to existing transmission infrastructure with the topographical advantages described above, as the mountainous nature of the broader region can make grid connection challenging in more remote areas.

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.