Solar Energy Production in Palmas, Tocantins, Brazil

Palmas, Tocantins, Brazil, located at latitude -10.1683 and longitude -48.3264, offers excellent conditions for solar PV energy generation throughout the year. Situated in the tropics, this location benefits from consistent sunlight patterns that make it highly suitable for solar energy production. The seasonal solar energy output in Palmas demonstrates remarkable consistency with slight variations throughout the year. During summer, each kilowatt of installed solar capacity generates approximately 5.23 kWh per day. Autumn sees a slight increase to 5.77 kWh per day. Winter, interestingly, provides the highest production at 6.45 kWh per day, while spring yields about 5.92 kWh per day.

Optimal Solar Panel Installation

For those considering fixed solar panel installations in Palmas, Tocantins, the ideal tilt angle to maximize year-round energy production is 11 degrees facing North. This specific angle has been calculated to optimize solar capture throughout the year, accounting for the Earth's elliptical orbit and the location's position in the southern hemisphere. Winter stands out as the peak production season in Palmas, Tocantins, which differs from many locations in higher latitudes where summer typically provides the highest solar yields. This winter advantage is likely due to clearer skies during the dry season, allowing for more direct solar radiation to reach the panels.

Environmental Considerations

Despite Palmas' generally favorable conditions for solar energy, several environmental factors may impact production efficiency:

• Heavy rainfall during the wet season (typically October to April) can temporarily reduce solar output due to cloud cover and panel soiling.
• Dust accumulation is a significant concern during the dry season, potentially reducing panel efficiency by 5-15% if not addressed.
• High temperatures, which regularly exceed 35°C (95°F) in Palmas, Tocantins, can reduce solar panel efficiency as most panels lose efficiency above their rated temperature.

Preventative Measures

To maximize solar energy production in Palmas, Tocantins, several preventative measures can be implemented: Installing an automated cleaning system or establishing a regular manual cleaning schedule can minimize production losses from dust and dirt accumulation. This is particularly important during the dry season when dust levels are highest. Using solar panels with lower temperature coefficients (typically monocrystalline or bifacial panels) can help maintain better efficiency during hot periods. Additionally, ensuring adequate airflow beneath the panels by elevating the mounting structure can help dissipate heat. For larger installations, implementing a tracking system rather than fixed panels could increase daily production by 20-30%, though this comes with higher installation and maintenance costs. Given the consistent year-round production, however, even fixed installations at the recommended 11-degree tilt will perform excellently.

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 Palmas

Seasonal solar PV output for Latitude: -10.1683, Longitude: -48.3264 (Palmas, 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 11° North in Palmas, Brazil

To maximize your solar PV system's energy output in Palmas, Brazil (Lat/Long -10.1683, -48.3264) throughout the year, you should tilt your panels at an angle of 11° 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 Palmas, 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 Palmas, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 11° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
6° South in Summer	17° North in Autumn	26° North in Winter	5° 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 Palmas, 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 Palmas, 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 Palmas, Brazil

The topography around Palmas, Brazil presents a diverse landscape characterized by a mix of plateaus, rolling hills, valleys, and water bodies. Located in the central region of Tocantins state, Palmas sits on the eastern banks of the Tocantins River, which has been dammed to form Lake Palmas (also known as Lake Luís Eduardo Magalhães). The city itself is positioned at an elevation of approximately 230 meters above sea level. The Serra do Lajeado mountain range runs parallel to the eastern edge of the city, rising to heights of around 600 meters and creating a distinctive backdrop to the urban landscape. This modest mountain range forms part of the larger geological formation known as the Central Brazilian Plateau. The terrain gradually slopes down from these eastern highlands toward the Tocantins River valley in the west.

Regional Landforms

The broader region surrounding Palmas features the characteristic Cerrado biome, Brazil's tropical savanna, which includes a mixture of grasslands, woodlands, and gallery forests along watercourses. The topography is generally characterized by gently undulating plains interspersed with plateaus and occasional hills. To the west of the Tocantins River, the landscape becomes more level, with extensive plains that stretch toward the western borders of Tocantins state. These areas typically have less dramatic elevation changes compared to the eastern side of Palmas. The region also contains numerous smaller rivers and streams that feed into the Tocantins River system, creating valleys and drainage patterns that have shaped the local topography over millennia. These waterways have carved gentle depressions throughout the landscape.

Solar PV Potential Areas

For large-scale solar photovoltaic development, several areas around Palmas offer promising conditions based on their topographical features: The western plains beyond the Tocantins River present extensive flat or gently sloping terrain ideal for large solar installations. These areas benefit from minimal shadowing effects and simplified construction requirements. The relatively low elevation changes reduce the costs associated with land preparation and infrastructure development. The elevated plateaus to the east and southeast of Palmas, away from the steeper portions of the Serra do Lajeado, offer another promising option. These plateaus receive excellent solar exposure due to their elevation and typically feature less vegetation cover than lower areas, reducing clearing requirements. The northern and southern approaches to Palmas, where the terrain opens into broader valleys and plains, also present suitable conditions for solar development. These areas combine good accessibility with favorable topography and minimal flooding risk. Areas to avoid would include the immediate surroundings of the Serra do Lajeado due to steeper slopes and potential shadowing effects, as well as low-lying areas near the Tocantins River and its tributaries that may be subject to seasonal flooding or have higher humidity levels. The Cerrado vegetation in the region is relatively sparse compared to more densely forested biomes, which reduces land clearing challenges for solar development. However, environmental considerations should include the protection of gallery forests along watercourses, which play crucial ecological roles despite their limited extent. In terms of accessibility, the relatively well-developed road network around Palmas, including federal highways BR-010 and TO-050, provides good infrastructure access to many of the topographically suitable areas, further enhancing their potential for large-scale solar development.

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.