Solar Energy Potential in Vilhena, Rondônia, Brazil

Vilhena, Rondônia, Brazil, situated at latitude -12.7481 and longitude -60.1427, offers excellent conditions for solar energy generation throughout the year. Located in the tropics, this region benefits from consistent sunlight patterns that make it particularly suitable for photovoltaic (PV) installations. The seasonal solar production data reveals remarkably stable energy output across all meteorological seasons. During winter, the location achieves its peak production at 5.75 kWh per day for each kilowatt of installed capacity. Spring follows closely with 5.60 kWh/day, while autumn generates 5.39 kWh/day and summer produces 5.17 kWh/day per installed kilowatt. This minimal seasonal variation (less than 11% difference between the highest and lowest producing seasons) demonstrates Vilhena's exceptional year-round solar potential. Unlike temperate regions that experience significant seasonal fluctuations, Vilhena's tropical location ensures relatively consistent solar production throughout the calendar year.

Optimal Panel Installation

For fixed solar panel installations in Vilhena, Rondônia, the ideal tilt angle to maximize year-round energy production is 13 degrees facing North. This specific angle has been calculated by analyzing daily solar elevation patterns at this latitude, weighted by the location's solar irradiance potential.

Environmental and Weather Considerations

Despite Vilhena's excellent solar potential, several environmental factors should be considered when planning installations:

• The region experiences a distinct wet season (roughly November to April) when heavy rainfall and increased cloud cover may temporarily reduce solar efficiency.
• High humidity levels during the wet season can accelerate degradation of electrical components if not properly protected.
• Dust accumulation during the dry season can gradually reduce panel efficiency if not addressed.

Preventative Measures

To maximize solar production in Vilhena, Rondônia, consider implementing these preventative measures:

• Install panels with high-quality weather-resistant sealing to protect against humidity damage.
• Implement a regular cleaning schedule, particularly during the dry season when dust accumulation is highest.
• Consider slight overcapacity in system design to compensate for reduced efficiency during the wet season.
• Use inverters with wide operating ranges to handle the varying light conditions between wet and dry seasons.
• Ensure proper drainage around ground-mounted systems to prevent water pooling during heavy tropical rainfall.

With these considerations addressed, Vilhena represents a prime location for solar PV deployment, offering consistent and substantial energy production throughout the year with minimal seasonal variation.

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 Vilhena

Seasonal solar PV output for Latitude: -12.7481, Longitude: -60.1427 (Vilhena, 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 13° North in Vilhena, Brazil

To maximize your solar PV system's energy output in Vilhena, Brazil (Lat/Long -12.7481, -60.1427) throughout the year, you should tilt your panels at an angle of 13° 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 Vilhena, 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 Vilhena, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 13° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
3° South in Summer	19° North in Autumn	28° North in Winter	7° 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 Vilhena, 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 Vilhena, 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 Vilhena, Brazil

The topography surrounding Vilhena, Brazil presents a fascinating landscape situated on the Brazilian Plateau (Planalto Central) in the state of Rondônia. Located at approximately 600 meters above sea level, Vilhena occupies a significant position at the transition between the Amazon rainforest and the Cerrado savanna ecosystems. This transitional character gives the region a unique ecological profile. The terrain around Vilhena is characterized by gently rolling hills and plateaus with moderate elevation changes. The city itself sits on what is locally known as the Chapada dos Parecis, a broad tableland that forms part of the watershed divide between the Amazon Basin to the north and the Paraguay River Basin to the south. This elevated position contributes to Vilhena's nickname as "Portal da Amazônia" (Gateway to the Amazon).

Surrounding Landscape Features

To the north and northwest of Vilhena, the terrain gradually descends toward the Amazon Basin, with increasing forest density and humidity. The landscape in these directions becomes progressively more characteristic of the Amazon biome, with denser vegetation and more complex drainage patterns. Southward and eastward, the Cerrado ecosystem dominates, featuring more open vegetation with scattered trees and shrubs across rolling grasslands. This area presents a more savanna-like appearance with distinctive dry seasons and less dense forest cover than the Amazonian regions to the north. The soil composition varies across the region, with latosols (highly weathered, iron-rich soils) predominant in many areas. These soils typically have good drainage properties but may present challenges for certain types of agriculture without proper management.

Optimal Areas for Solar PV Development

For large-scale solar photovoltaic development, the areas south and southeast of Vilhena offer particularly favorable conditions. These locations combine several advantageous characteristics: The Cerrado regions feature more open terrain with less dense vegetation, reducing the need for extensive clearing and minimizing environmental impact. These areas typically experience more consistent solar radiation throughout the year due to reduced cloud cover compared to the more forested regions to the north. Specifically, the elevated plateaus within 30-50 kilometers southeast of Vilhena present ideal topographical conditions for solar installations. These areas benefit from relatively flat terrain that requires minimal grading, good drainage to prevent flooding issues, and accessibility to existing transportation infrastructure along the BR-364 highway. The southwestern corridors extending from Vilhena toward the Mato Grosso state border also offer promising locations. These areas feature extensive open spaces with suitable elevation and orientation for capturing optimal solar exposure throughout the day. It's worth noting that while the northern regions closer to the Amazon proper receive abundant sunshine, the increased humidity, greater precipitation, and denser vegetation make these areas less immediately suitable for large-scale solar development from both practical and environmental perspectives. The southeastern Cerrado zones not only present fewer technical challenges for installation but also typically involve less sensitive ecological systems compared to the Amazonian transition zones, potentially simplifying environmental permitting processes while still providing excellent conditions for solar energy capture.

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

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