Solar Energy Potential in Mariana, Minas Gerais, Brazil

Mariana, Minas Gerais, Brazil offers a promising location for solar energy generation with consistent production throughout the year. Located in the tropics, this site receives reliable sunlight with seasonal variations primarily determined by wet and dry periods rather than dramatic changes in daylight hours. The solar electricity production data reveals a relatively balanced output across all seasons. During summer months, panels can generate approximately 5.99 kWh per day for each kilowatt of installed capacity. This dips slightly to 5.44 kWh/day in autumn and reaches its lowest point in winter at 4.84 kWh/day, before recovering to 5.47 kWh/day in spring. What makes Mariana particularly suitable for solar energy is the minimal fluctuation between seasonal outputs. The difference between the highest production (summer) and lowest production (winter) is only about 1.15 kWh/day per installed kilowatt. This consistency means solar installations can provide relatively reliable power year-round, unlike locations with extreme seasonal variations.

Optimal Panel Installation

For fixed solar panel installations in Mariana, Minas Gerais, the ideal tilt angle is 19 degrees facing North. This specific angle has been calculated to maximize total annual energy production, taking into account the site's latitude, seasonal sun paths, and solar irradiance patterns throughout the year.

Environmental and Weather Considerations

Despite favorable conditions, several factors could potentially impact solar production in Mariana:

• Heavy rainfall during wet seasons may reduce solar efficiency due to cloud cover and panel soiling.
• Dust accumulation is a concern in tropical environments, particularly during dry seasons.
• Potential for occasional severe weather events including tropical storms.

To mitigate these challenges, several preventative measures can be implemented:

• Installing automated cleaning systems or scheduling regular manual cleaning to remove dust and debris.
• Using panels with anti-reflective coatings and high-quality tempered glass that performs better in variable weather conditions.
• Implementing robust mounting structures designed to withstand potential strong winds during storm seasons.
• Considering slightly elevated installation angles (beyond the optimal 19 degrees) in areas prone to heavy dust to facilitate natural cleaning during rainfall.

With these considerations addressed, Mariana presents an excellent opportunity for solar energy development with its consistent year-round production potential and relatively minor seasonal variations.

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 Mariana

Seasonal solar PV output for Latitude: -20.3215, Longitude: -43.3083 (Mariana, 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 Mariana, Brazil

To maximize your solar PV system's energy output in Mariana, Brazil (Lat/Long -20.3215, -43.3083) 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 Mariana, 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 Mariana, 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 Mariana, 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 Mariana, 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 Mariana, Brazil

The region surrounding Mariana, Brazil presents a complex and varied topographical landscape characteristic of the state of Minas Gerais. Located in the eastern portion of the historical Iron Quadrangle (Quadrilátero Ferrífero), this area features predominantly mountainous terrain with significant elevation changes. The topography is defined by the Serra do Espinhaço mountain range, which creates a rugged landscape of peaks and valleys throughout the region. Mariana itself sits at an elevation of approximately 700 meters above sea level, but the surrounding areas quickly rise to heights exceeding 1,200 meters in some places. This mountainous character creates numerous slopes with varying aspects (directions the slopes face) and inclinations. The terrain is dissected by numerous waterways, including the headwaters of the Rio Doce basin, which have carved deep valleys between the mountain ridges over geological time.

Topographical Features

The landscape around Mariana exhibits distinctive topographical features formed by centuries of geological processes. The underlying rock formations consist primarily of quartzites, itabirites (iron formations), and schists, which have weathered differently to create the varied terrain. The mountains typically have steep slopes, while some areas feature more gently rolling hills, particularly to the east of the city. The region's topography has been significantly influenced by both natural erosion processes and human activities, particularly mining operations that have been ongoing since the colonial period. These activities have altered some of the natural contours of the land, creating both challenges and opportunities for land use planning. Vegetation coverage varies with elevation and slope aspect, with denser forest coverage typically found on northern slopes and in valleys where moisture levels are higher. Southern and western slopes often feature more sparse vegetation, particularly at higher elevations.

Areas Suitable for Solar PV Development

When considering large-scale solar photovoltaic installations, several factors related to topography must be evaluated. The ideal areas for solar PV development around Mariana would be those that combine favorable topographical characteristics with appropriate land availability and minimal environmental impact. The plateaus and more gently sloping areas to the east and northeast of Mariana present some of the most promising locations for large-scale solar installations. These areas typically feature less steep terrain, reducing construction challenges and costs associated with site preparation. The slightly lower elevations in these directions also tend to have less cloud cover than the higher mountain peaks. South-facing slopes (which in the Southern Hemisphere receive less direct solar radiation) should generally be avoided for optimal energy production. Instead, north-facing gentle slopes with inclinations between 5-15 degrees would provide natural optimization for solar panel placement, as they naturally orient toward the sun's path across the northern sky. Areas that have been previously disturbed by mining activities but are now inactive could also present opportunities for solar development, offering the dual benefit of renewable energy production and land reclamation. Several such sites exist in the broader Iron Quadrangle region surrounding Mariana. The western portions of the municipality, where the terrain begins to level out somewhat compared to the more mountainous eastern sections, could also accommodate larger solar installations. These areas typically have better accessibility via existing road networks, which is an important logistical consideration for construction and maintenance of large-scale facilities. It's worth noting that while the mountainous topography presents certain challenges for very large contiguous solar farms, it also creates opportunities for distributed solar installations that can take advantage of the varied terrain. The combination of high elevation and relatively clear atmospheric conditions in the higher plateau areas can be particularly advantageous for solar energy capture efficiency.

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.