Ouro Preto, Minas Gerais, Brazil presents a moderately favorable location for year-round solar energy generation, with the tropical climate providing consistent sunlight throughout most of the year as seasons are characterized more by wet and dry periods rather than significant temperature variations.

Solar Energy Production Potential

The solar energy output data for this location shows reasonable consistency across seasons, with summer producing the highest yields at 5.99 kWh per day per kW of installed solar capacity. Spring and autumn perform similarly well at 5.47 kWh and 5.44 kWh respectively, while winter shows the lowest but still substantial output at 4.84 kWh per day per kW. For optimal year-round performance, solar panels should be installed at a fixed tilt angle of 19 degrees north. This angle has been calculated to maximize total annual solar production by accounting for the sun's varying elevation throughout the year and weighting these angles against actual solar irradiance data.

Environmental and Weather Challenges

Several local factors could potentially impact solar energy production in Ouro Preto. The region's wet season brings increased cloud cover and rainfall, which can reduce solar irradiance and create shading issues. The mountainous terrain of the area, being located in the Serra do Espinhaço range, can create microclimatic conditions with increased humidity and potential for localized weather patterns. Dust accumulation during drier periods can significantly reduce panel efficiency, while the region's mining history means airborne particulates may settle on solar panels more frequently than in other locations. The altitude of approximately 1,100 meters above sea level can lead to more intense UV exposure, which while beneficial for energy production, may accelerate panel degradation over time.

Preventative Measures for Optimal Performance

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

• Install panels with adequate spacing and proper drainage systems to handle heavy rainfall during wet seasons
• Implement regular cleaning schedules, particularly during dry periods when dust accumulation is highest
• Use high-quality anti-reflective coatings and UV-resistant materials designed for high-altitude tropical conditions
• Consider micro-inverters or power optimizers to minimize the impact of partial shading from clouds or terrain features

Additionally, proper ventilation beneath panels helps manage the heat buildup that can occur in tropical climates, while selecting panels with lower temperature coefficients can maintain efficiency during warmer periods. Regular maintenance and monitoring systems become particularly important in this environment to ensure consistent performance 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 Ouro Preto

Seasonal solar PV output for Latitude: -20.3914, Longitude: -43.6442 (Ouro Preto, 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 19° North in Ouro Preto, Brazil

To maximize your solar PV system's energy output in Ouro Preto, Brazil (Lat/Long -20.3914, -43.6442) throughout the year, you should tilt your panels at an angle of 19° 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 Ouro Preto, 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 Ouro Preto, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 19° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
4° North in Summer	26° North in Autumn	36° North in Winter	14° 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 Ouro Preto, 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 Ouro Preto, 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 Ouro Preto, Brazil

Topographical Features of Ouro Preto

Ouro Preto sits dramatically perched in the mountainous terrain of Minas Gerais state, nestled within the Serra do Espinhaço mountain range at an elevation of approximately 1,100 meters above sea level. The historic city occupies a series of steep hillsides and narrow valleys, creating a distinctly undulating landscape that has shaped both its colonial architecture and modern development patterns. The surrounding topography is characterized by rolling hills, deep ravines, and rocky outcrops that reflect the region's geological heritage as part of Brazil's mineral-rich Quadrilátero Ferrífero (Iron Quadrilateral).

The terrain around Ouro Preto features a complex network of ridges and valleys running in various directions, with elevations ranging from about 900 meters in the lower valleys to over 1,400 meters on the highest peaks. The landscape displays the typical characteristics of the Atlantic Forest biome transition zone, where remnant forest patches cling to steeper slopes while grasslands and agricultural areas occupy the gentler terrain. Water courses have carved numerous small valleys throughout the region, creating a mosaic of different slope angles and aspects that significantly influence local microclimates and land use patterns.

Slope Characteristics and Land Use Implications

The majority of land immediately surrounding Ouro Preto consists of moderate to steep slopes, with gradients often exceeding 15-20 degrees. These steep inclines, while contributing to the region's scenic beauty, present significant challenges for large-scale infrastructure development. The rocky substrate, combined with shallow soils in many areas, further complicates construction activities and increases development costs. Many hillsides show evidence of historical mining activities, with terraced areas and altered drainage patterns that reflect centuries of gold and iron ore extraction.

Agricultural activities in the immediate vicinity tend to concentrate on the gentler slopes and valley floors, where deeper soils and more favorable drainage conditions exist. Cattle grazing represents the predominant land use on many of the rolling hills, while steeper areas often remain under natural vegetation or have been abandoned following historical mining operations. The fragmented nature of suitable flat land has resulted in a patchwork landscape of small agricultural plots interspersed with areas of natural regeneration.

Optimal Areas for Solar Development

The most promising locations for large-scale solar photovoltaic installations lie in the broader valleys and plateau areas located 15-30 kilometers northeast and southwest of Ouro Preto proper. These areas feature more gentle topography with slopes typically under 5 degrees, making them far more suitable for the installation and maintenance of extensive solar arrays. The plateau regions, in particular, offer large contiguous areas of relatively flat terrain that would minimize grading requirements and reduce overall project costs.

Areas around the municipalities of Itabirito and Mariana, located southeast of Ouro Preto, present particularly favorable conditions due to their combination of gentler topography and proximity to existing electrical transmission infrastructure. These locations benefit from rolling terrain that has been partially modified by historical mining activities, creating large cleared areas with established access roads. The soil conditions in these areas, while not ideal for agriculture due to their mineral content, pose fewer obstacles for solar installation foundations.

The valleys extending toward Belo Horizonte to the west also offer potential sites, particularly where the terrain opens up into broader agricultural areas. These locations combine relatively flat topography with good accessibility via existing highway networks, which would facilitate both construction logistics and ongoing maintenance operations. The presence of cleared agricultural land in these areas would also minimize environmental impact concerns related to forest clearing, making permitting processes more straightforward.

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.