Castanhal, Pará, Brazil, situated at latitude -1.2723 and longitude -47.8563, presents a favorable location for solar energy generation throughout the year. This tropical setting offers consistent sunlight, with seasons primarily characterized by wet and dry periods rather than temperature variations.

Seasonal Solar Performance

The solar energy output in Castanhal demonstrates impressive consistency across all seasons. Spring emerges as the most productive period, yielding 6.27 kWh per day for each kilowatt of installed solar capacity. Winter follows closely with 6.03 kWh/day, while autumn and summer produce 5.33 kWh/day and 5.02 kWh/day, respectively. This data reveals that Castanhal experiences optimal solar conditions during the drier months, typically from July to December. The slightly lower output during summer and autumn can be attributed to increased cloud cover and rainfall during the wet season, which generally occurs from January to June.

Ideal Panel Tilt

For fixed solar panel installations in Castanhal, Pará, the ideal tilt angle to maximize year-round energy production is 2 degrees facing North. This near-horizontal orientation takes advantage of the location's proximity to the equator, allowing panels to capture sunlight efficiently throughout the year without significant seasonal adjustments.

Environmental Considerations

While Castanhal's tropical climate is generally conducive to solar energy production, there are a few environmental factors to consider: 1. High humidity and rainfall: During the wet season, increased cloud cover and precipitation may slightly reduce solar panel efficiency. To mitigate this, consider using panels with anti-reflective coatings and ensuring proper drainage systems are in place. 2. Dust and debris: The region's dry season can lead to accumulation of dust on solar panels. Regular cleaning and maintenance schedules should be implemented to maintain optimal performance. 3. Tropical vegetation: Rapid plant growth in the area may lead to shading issues. When installing solar systems, it's crucial to assess the surrounding vegetation and plan for regular trimming to prevent obstructions. By addressing these factors during installation and maintenance, solar energy systems in Castanhal can operate at peak efficiency, taking full advantage of the location's excellent solar potential 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 Castanhal

Seasonal solar PV output for Latitude: -1.2723, Longitude: -47.8563 (Castanhal, 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 Castanhal, Brazil

To maximize your solar PV system's energy output in Castanhal, Brazil (Lat/Long -1.2723, -47.8563) 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 Castanhal, 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 Castanhal, 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 Castanhal, 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 Castanhal, 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 Castanhal, Brazil

The region surrounding Castanhal, Brazil, located at latitude -1.2723 and longitude -47.8563, is characterized by a relatively flat topography typical of the Amazon Basin. This area is part of the vast lowland plains that dominate much of northern Brazil, with elevations generally ranging from 20 to 100 meters above sea level. The landscape is primarily composed of gently rolling hills and shallow valleys, interspersed with numerous small rivers and streams that form part of the extensive Amazon River network. The terrain around Castanhal is predominantly covered by dense tropical rainforest, although significant portions have been cleared for agriculture and urban development. The soil in this region is generally fertile, consisting of a mix of clay and sand, which supports the lush vegetation that is characteristic of the Amazon biome.

Potential for Large-Scale Solar PV

When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, several factors come into play. The relatively flat topography of the region is generally favorable for solar PV development, as it reduces the need for extensive land preparation and allows for easier installation and maintenance of solar panels. The areas most suited for large-scale solar PV would likely be those that have already been cleared of dense forest cover, such as abandoned agricultural lands or degraded pastures. These open spaces would provide the necessary exposure to sunlight without requiring further deforestation, which is a critical environmental concern in the Amazon region. Ideal locations would be situated away from flood-prone areas near rivers and streams, as flooding can pose risks to solar infrastructure. Higher ground with good drainage would be preferable to ensure the longevity and efficiency of the solar installations. Additionally, proximity to existing power infrastructure and roads would be advantageous for connecting the solar farms to the grid and facilitating construction and maintenance. Areas close to Castanhal or other nearby towns might offer these benefits while still providing sufficient open space for large-scale installations. It's important to note that while the region receives ample sunlight throughout the year, the high humidity and frequent cloud cover characteristic of the Amazon climate may impact the overall efficiency of solar PV systems. Therefore, careful site selection and system design would be crucial to maximize energy production in this tropical environment.

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.