Coimbra, Minas Gerais, Brazil represents a very good location for year-round solar photovoltaic energy generation. Located in the tropical region at coordinates -20.842, -42.7953, this area benefits from the consistent sunlight patterns typical of tropical climates, where seasonal variations are primarily distinguished by wet and dry periods rather than dramatic changes in daylight hours.

Solar Energy Production Potential

The solar energy output data for Coimbra shows strong production capabilities throughout all seasons. Summer delivers the highest output at 6.17 kWh per day per kW of installed solar capacity, making it the peak production season. Spring follows as the second-best performing season with 5.30 kWh/day per kW, while autumn produces 5.53 kWh/day per kW. Even during winter, the lowest production period, the location still generates a respectable 4.67 kWh/day per kW. This seasonal pattern demonstrates that Coimbra maintains relatively consistent solar energy generation year-round, with summer and spring being the optimal periods for maximum solar harvest. The difference between the best and worst performing seasons is only about 1.5 kWh/day per kW, indicating excellent reliability for solar installations. For fixed panel installations at this location, the ideal tilt angle to maximize total year-round solar production is 20 degrees facing North. This angle is calculated by analyzing daily solar elevation angles at the latitude, determining optimal panel positioning, and weighting these angles based on solar irradiance data while accounting for Earth's elliptical orbit.

Environmental and Weather Challenges

Several environmental and weather factors in this tropical location could potentially impact solar energy production:

• Heavy rainfall during wet season: Tropical regions experience intense rainy periods that can reduce solar irradiance and create challenges for system maintenance
• High humidity levels: Consistent moisture in the air can lead to corrosion of electrical components and reduce panel efficiency over time
• Dust and debris accumulation: Dry seasons combined with agricultural activity in the region can result in dust buildup on solar panels
• Extreme heat: While sunlight is abundant, excessive temperatures can actually reduce photovoltaic panel efficiency

Preventative Measures for Optimal Performance

To ensure maximum energy production despite these challenges, several preventative measures should be implemented during solar installation: Regular cleaning systems or easy access for manual cleaning should be incorporated into the design to address dust accumulation during dry periods. Installing panels with adequate ventilation spacing underneath helps manage heat buildup and maintains optimal operating temperatures. Using corrosion-resistant materials and proper sealing for all electrical connections is essential in this high-humidity environment. Galvanized or stainless steel mounting systems should be prioritized over standard steel components. Implementing proper drainage around ground-mounted systems prevents water pooling during heavy rains. For rooftop installations, ensuring adequate waterproofing and using marine-grade wiring helps protect against moisture infiltration. Installing monitoring systems allows for early detection of performance issues related to weather impacts, enabling prompt maintenance responses. Consider micro-inverters or power optimizers to minimize the impact of partial shading from clouds or debris on individual panels. Overall, Coimbra's tropical location offers excellent solar potential with manageable environmental challenges that can be effectively addressed through proper planning and installation techniques.

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 Coimbra

Seasonal solar PV output for Latitude: -20.842, Longitude: -42.7953 (Coimbra, 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 20° North in Coimbra, Brazil

To maximize your solar PV system's energy output in Coimbra, Brazil (Lat/Long -20.842, -42.7953) throughout the year, you should tilt your panels at an angle of 20° 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 Coimbra, 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 Coimbra, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 20° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
5° North in Summer	26° North in Autumn	36° North in Winter	15° 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 Coimbra, 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 Coimbra, 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 Coimbra, Brazil

Topographical Features of Coimbra, Brazil

Coimbra is situated in the southeastern region of Minas Gerais state, nestled within the Serra da Mantiqueira mountain range. The terrain around this municipality is characterized by rolling hills, steep valleys, and elevated plateaus that create a diverse and complex landscape. The elevation in the immediate vicinity ranges from approximately 800 to 1,200 meters above sea level, with the town itself positioned on relatively high ground that offers commanding views of the surrounding countryside.

The topography is heavily influenced by the ancient geological formations of the Brazilian Highlands, resulting in a landscape dominated by rounded hills and deep river valleys carved over millions of years. The region features numerous small streams and tributaries that flow through these valleys, creating a network of waterways that have shaped the local terrain. The slopes vary considerably, with some areas presenting gentle inclines while others display steep gradients that can exceed 30 degrees.

Rocky outcrops and exposed granite formations are common throughout the area, particularly on the higher elevations and ridge lines. These geological features contribute to the rugged beauty of the landscape but also present challenges for large-scale development projects. The soil composition varies from fertile valley bottoms to thinner, rockier soils on the hillsides and elevated areas.

Optimal Locations for Large-Scale Solar Development

The most suitable areas for large-scale solar photovoltaic installations around Coimbra would be the elevated plateaus and gentle slopes found on the broader hilltops and ridge systems. These locations offer several advantages including relatively flat or gently sloping terrain that minimizes the need for extensive grading and reduces installation costs. The higher elevations also tend to have fewer obstructions from surrounding hills and vegetation, allowing for better exposure to direct sunlight throughout the day.

The plateau areas located to the north and northeast of the town center present particularly promising opportunities for solar development. These elevated flat areas have minimal tree cover and are already partially cleared for agricultural use, which would reduce environmental impact and site preparation requirements. The consistent elevation across these plateaus also means that solar panels can be installed with uniform orientation and tilt angles, optimizing energy capture efficiency.

Areas with south-facing slopes of moderate gradient, typically between 5 and 15 degrees, would also be well-suited for solar installations. These locations naturally provide optimal angles for solar panel placement while maintaining reasonable accessibility for construction and maintenance activities. The key is identifying slopes that are not too steep to require extensive terracing while avoiding valley bottoms that may experience morning fog or shadows from surrounding hills.

The less suitable areas for large-scale solar development include the steep valley walls and deeply incised drainage areas where installation would be technically challenging and economically unfeasible. Additionally, the heavily forested areas on some of the steeper slopes would require significant clearing, potentially creating environmental concerns and increasing project costs substantially.

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.