Pirassununga, São Paulo, Brazil presents a very favorable location for year-round solar energy generation. Located in the tropical region where sunlight remains consistent throughout most of the year, this area experiences seasons characterized more by wet and dry periods rather than the dramatic temperature variations seen in temperate climates.

Solar Energy Production Potential

The solar energy output data for Pirassununga shows strong performance across all seasons. Summer delivers the highest production at 6.78 kWh per day per kW of installed solar capacity, while spring follows closely with 6.22 kWh per day. Autumn maintains solid output at 5.55 kWh per day, and even winter - the lowest production season - still generates a respectable 4.80 kWh per day per kW installed. For maximum year-round energy production, solar panels should be installed at a fixed tilt angle of 20 degrees facing north. This optimal angle is calculated by analyzing daily solar elevation angles throughout the year and weighting them according to solar irradiance potential.

Environmental and Weather Challenges

Several local factors could potentially impact solar energy production in Pirassununga:

• Heavy rainfall during wet season: Extended periods of rain and cloud cover can significantly reduce solar output
• High humidity levels: Can lead to moisture-related equipment issues and reduced panel efficiency
• Dust and particulate accumulation: Common in tropical climates, especially during dry periods
• Intense UV exposure: Can accelerate equipment degradation over time

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies should be considered: Proper drainage systems around solar installations are essential to prevent water pooling and ensure quick runoff during heavy rains. Panels should be mounted with adequate spacing to allow air circulation, which helps reduce humidity-related issues and prevents overheating. Regular cleaning schedules become particularly important in this climate. Installing panels at the recommended 20-degree tilt helps with natural rain-washing, but manual cleaning may still be necessary during extended dry periods when dust accumulation peaks. Equipment selection should prioritize components rated for tropical conditions, including enhanced moisture sealing and UV-resistant materials. Proper electrical grounding and surge protection are also crucial given the potential for intense tropical storms. Despite these considerations, Pirassununga's consistent solar resource makes it an excellent location for solar energy generation, with proper installation and maintenance practices ensuring optimal long-term performance.

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 Pirassununga

Seasonal solar PV output for Latitude: -22.0022, Longitude: -47.3677 (Pirassununga, 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 Pirassununga, Brazil

To maximize your solar PV system's energy output in Pirassununga, Brazil (Lat/Long -22.0022, -47.3677) 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 Pirassununga, 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 Pirassununga, 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
6° North in Summer	28° North in Autumn	37° 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 Pirassununga, 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 Pirassununga, 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 Pirassununga, Brazil

Topographical Features of Pirassununga

Pirassununga sits within the interior plateau region of São Paulo state, characterized by gently rolling hills and relatively modest elevation changes. The city is positioned at approximately 627 meters above sea level, nestled within the broader landscape of the Brazilian Highlands. This elevated plateau region features undulating terrain with gradual slopes rather than steep mountainous formations, creating a landscape that transitions smoothly between higher and lower elevations.

The surrounding countryside displays the typical characteristics of the São Paulo interior, with expansive agricultural plains interrupted by low ridges and shallow valleys. The Mogi Guaçu River system influences the local topography, carving gentle valleys through the landscape as it meanders northward. These river valleys create natural drainage patterns that have shaped the rolling terrain over geological time periods.

The region experiences a subtropical highland climate, with the elevated position contributing to more moderate temperatures than might be expected at this latitude. The plateau setting provides excellent exposure to prevailing weather patterns, with minimal obstruction from major topographical barriers. This positioning allows for consistent atmospheric conditions across the broader area.

Optimal Areas for Large-Scale Solar Development

The most promising locations for extensive solar photovoltaic installations lie on the elevated plateaus and gentle ridges that characterize the region around Pirassununga. These higher elevation areas offer several advantages, including reduced atmospheric interference and excellent exposure to solar radiation throughout the day. The broad, relatively flat plateau surfaces provide ample space for large arrays while maintaining consistent orientation toward the sun.

Agricultural areas on the elevated plains present particularly attractive opportunities for solar development. The existing cleared land requires minimal preparation, and the gentle slopes allow for optimal panel positioning without extensive grading or terracing. These areas typically feature good access to transportation infrastructure, which is essential for construction and maintenance activities.

The ridgelines and higher elevations to the southeast and southwest of Pirassununga offer exceptional potential due to their commanding position above the surrounding landscape. These locations benefit from reduced shading effects and excellent air circulation, which helps maintain optimal operating temperatures for photovoltaic equipment. The consistent elevation profile across these areas allows for uniform installation designs across large sites.

Areas near the Mogi Guaçu River valley, while lower in elevation, still present viable options for solar development, particularly on the valley sides where gentle slopes provide good solar exposure. The proximity to water resources can be advantageous for cleaning and maintenance operations, though care must be taken to avoid flood-prone areas near the river itself.

The northeastern plateau areas extending toward Descalvado and the southwestern elevations toward São Carlos represent some of the most geographically suitable terrain in the region. These locations combine favorable topography with good accessibility and minimal environmental constraints, making them prime candidates for utility-scale solar installations.

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.