Viseu, Pará, Brazil presents an excellent location for year-round solar energy generation through photovoltaic (PV) systems. Located in the tropical region at coordinates -1.302, -46.3208, this area benefits from consistent sunlight throughout the year, with seasons characterized primarily by wet and dry periods rather than dramatic temperature variations.

Solar Energy Production Potential

The solar energy output data for Viseu demonstrates remarkably consistent performance across all seasons. During summer months, solar panels can be expected to generate 5.13 kWh per day for each kilowatt of installed capacity. Autumn production remains nearly identical at 5.09 kWh per day per kW, showing minimal seasonal variation. Winter and spring months actually show improved performance, with winter producing 5.84 kWh per day per kW and spring delivering the highest output at 6.03 kWh per day per kW. This pattern reflects the tropical location's favorable sun angles during these periods.

Optimal Installation Configuration

For maximum year-round energy production, solar panels at this Viseu location should be installed at a fixed tilt angle of 2 degrees facing north. This shallow angle optimization accounts for the location's proximity to the equator and maximizes total annual solar collection by balancing sun angles throughout the year.

Environmental and Weather Considerations

Several local factors could potentially impact solar energy production in Viseu and require careful planning during installation:

• Heavy rainfall during wet season: Tropical regions experience intense precipitation periods that can reduce solar irradiance and create maintenance challenges
• High humidity levels: Persistent moisture can lead to corrosion of electrical components and reduced panel efficiency
• Dense cloud cover: Extended periods of thick cloud formation during wet seasons can significantly reduce energy output
• Vegetation growth: Rapid plant growth in tropical climates can quickly create shading issues if not properly managed

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies should be implemented. Proper drainage systems around solar installations prevent water accumulation that could damage equipment or create safety hazards. Using marine-grade wiring and corrosion-resistant mounting hardware helps combat the effects of high humidity. Regular vegetation management around solar installations prevents shading from fast-growing tropical plants. Installing panels with adequate spacing allows for proper air circulation, reducing moisture buildup and helping maintain optimal operating temperatures. Choosing high-quality inverters with robust weather sealing protects critical electrical components from moisture infiltration. Additionally, implementing a regular cleaning schedule removes accumulated dust and debris that wet-dry seasonal cycles can deposit on panel surfaces. Despite these considerations, Viseu's consistent solar output throughout the year makes it an highly suitable location for solar energy generation, with spring months offering peak production potential.

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 Viseu

Seasonal solar PV output for Latitude: -1.302, Longitude: -46.3208 (Viseu, 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 2° North in Viseu, Brazil

To maximize your solar PV system's energy output in Viseu, Brazil (Lat/Long -1.302, -46.3208) throughout the year, you should tilt your panels at an angle of 2° 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 Viseu, 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 Viseu, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 2° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
15° South in Summer	8° North in Autumn	17° North in Winter	5° 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 Viseu, 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 Viseu, 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 Viseu, Brazil

Topographical Features Around Viseu

The region surrounding Viseu in Pará state, Brazil features relatively flat to gently undulating terrain typical of the Amazon Basin's southeastern margins. This area sits within the transition zone between the Amazon lowlands and the higher elevations of central Brazil, creating a landscape characterized by subtle elevation changes rather than dramatic topographical features. The immediate vicinity consists primarily of low-lying plains and gentle hills, with elevations generally ranging from 50 to 150 meters above sea level. These modest elevation variations create a rolling countryside that extends across much of this part of Pará state. The terrain is punctuated by numerous small streams and tributaries that eventually flow into larger river systems, creating shallow valleys and modest ridgelines throughout the landscape.

Drainage Patterns and Water Features

The local hydrology is dominated by seasonal waterways and permanent streams that carve gentle channels through the landscape. During the wet season, many areas experience temporary flooding or become waterlogged, while the dry season reveals more defined drainage patterns. These water features create natural boundaries and influence the suitability of different areas for development projects. The soil composition varies from sandy to clay-rich deposits, with many areas showing signs of seasonal water retention. This creates a patchwork of different ground conditions across the region, with some areas remaining relatively dry year-round while others become boggy during periods of heavy rainfall.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations would be the elevated areas with good drainage characteristics, particularly the gentle ridgelines and higher plateaus scattered throughout the region. These locations offer several advantages including reduced risk of seasonal flooding, better soil stability for foundation work, and easier access for construction and maintenance activities. Areas with sandy or well-draining soils would be preferable over clay-rich zones that may become unstable during wet periods. The relatively flat nature of much of the terrain means that extensive grading would not be necessary, reducing development costs and environmental impact. The northern and eastern sections of the broader Viseu area tend to have slightly better drainage characteristics and more consistent elevation, making them particularly attractive for solar development. These areas also benefit from being somewhat removed from the main river valleys where seasonal flooding is more common. Sites located on the gentle slopes facing south would be ideal, as they would naturally shed water while providing good solar exposure. The absence of significant hills or mountains in the immediate area means that shading concerns are minimal, allowing for flexible site selection based primarily on ground conditions and accessibility rather than topographical constraints.

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.