Bom Retiro do Sul in Brazil, situated in the Southern Sub Tropics at latitude -29.6391, longitude -51.9128, presents varying solar energy generation potential throughout the year. This location experiences notable seasonal fluctuations in solar electricity production that are important to understand when planning a solar PV installation.

Seasonal Solar Production

Solar panels in this location would generate their highest output during summer, producing an average of 7.26kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season with 5.80kWh/day per kW installed. Autumn offers moderate generation at 4.62kWh/day, while winter shows the lowest production at just 3.24kWh/day per installed kW.

The substantial difference between summer and winter production (more than double) indicates that this location experiences significant seasonal variation. This pattern is typical for locations in the Southern Sub Tropics, where the sun's position changes considerably between seasons.

Optimal Panel Installation

For fixed solar panel installations in Bom Retiro do Sul, the ideal tilt angle to maximize year-round energy production is 26 degrees facing North. This specific angle optimizes the capture of solar radiation across all seasons, balancing the higher summer sun position with the lower winter sun path.

Environmental Considerations

Several environmental factors may affect solar production at this location. The region can experience significant rainfall, particularly during spring and summer months, which may temporarily reduce solar output. Installing panels with good drainage designs and regular cleaning schedules can mitigate the impact of rain and resulting dirt accumulation.

Morning fog can be common in this river valley location, potentially delaying peak production until later in the day. This factor should be considered when estimating daily production patterns rather than just total output.

The subtropical climate may also lead to higher temperatures, which can reduce panel efficiency. Using panels with good temperature coefficients and ensuring proper ventilation behind the array can help maintain better performance during hot periods.

Maximizing Production

Given the seasonal variation, a system designed primarily for year-round self-sufficiency would need to be sized according to winter production values, potentially resulting in significant excess generation during summer. Alternatively, grid-connected systems can take advantage of net metering during high-production periods to offset lower winter generation.

The relatively strong spring and summer production makes this location quite suitable for solar PV, despite the winter reduction. With proper system design and the recommended 26-degree northern tilt, solar panels in Bom Retiro do Sul can provide effective renewable energy generation throughout the year.

Note: The Southern Sub Tropics extend from -23.5° latitude South down to -35° latitude.

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 Bom Retiro Do Sul

Seasonal solar PV output for Latitude: -29.6391, Longitude: -51.9128 (Bom Retiro Do Sul, 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 26° North in Bom Retiro Do Sul, Brazil

To maximize your solar PV system's energy output in Bom Retiro Do Sul, Brazil (Lat/Long -29.6391, -51.9128) throughout the year, you should tilt your panels at an angle of 26° 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 Bom Retiro Do Sul, 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 Bom Retiro Do Sul, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 26° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
13° North in Summer	35° North in Autumn	45° North in Winter	22° 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 Bom Retiro Do Sul, 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 Bom Retiro Do Sul, 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 Bom Retiro Do Sul, Brazil

The region around Bom Retiro do Sul, Brazil presents a diverse topographical landscape characterized by a transition between the southern Brazilian highlands and the lower plains. Located in the state of Rio Grande do Sul, this municipality sits within the Taquari Valley, a significant geographical feature of the region.

Topographical Features

Bom Retiro do Sul is nestled along the banks of the Taquari River, which forms part of the Jacuí River basin before eventually draining into the Guaíba Lake. The immediate area around the town features relatively flat floodplains adjacent to the river, with gentle undulating terrain gradually rising as one moves away from the riverbanks. The broader region exhibits a mix of low hills and valleys, with elevations generally ranging between 20 to 100 meters above sea level in the immediate vicinity of the town. Moving eastward, the terrain becomes more varied and elevated as it transitions toward the Serra Geral mountain range, where elevations can exceed 600 meters. The western portions of the region tend to be flatter, forming part of the Central Depression of Rio Grande do Sul, while the northeastern areas begin to show the characteristic escarpments and higher elevations of the southern Brazilian highlands.

Vegetation and Land Use

The natural vegetation of the region historically consisted of a mixture of Atlantic Forest elements and grasslands. Today, much of the landscape has been modified for agricultural purposes, with a patchwork of crop fields, pastures, and scattered forest fragments. The river valleys contain riparian forests, while the hillsides and higher elevations may retain more substantial forest cover.

Solar PV Potential Areas

For large-scale solar photovoltaic installations, several areas near Bom Retiro do Sul show promising characteristics: The gently sloping terrain to the west and southwest of the town offers favorable conditions for solar development. These areas benefit from relatively flat topography that minimizes earthwork requirements while providing good drainage. The reduced forest cover in these predominantly agricultural zones also means less vegetation clearing would be necessary. The elevated plateaus to the northeast, while more distant from the town center, present interesting opportunities. These higher elevation sites typically experience less fog and atmospheric interference, potentially increasing solar radiation efficiency. However, these areas may require more substantial infrastructure development for access and grid connection. Areas along the higher ground between river valleys provide good compromise locations, offering reasonable solar exposure while avoiding flood-prone lowlands. The slight southern facing slopes in the northern portions of the region should generally be avoided for optimal solar gain in the Southern Hemisphere.

Topographical Challenges

Several topographical factors present challenges for solar development in the region. The river floodplains, while flat and accessible, face periodic flooding risks that would threaten infrastructure. The more heavily forested hillsides would require significant clearing, raising both environmental concerns and development costs. Areas with steep slopes, particularly in the transitional zones between the lowlands and highlands, would require extensive terracing and present challenges for construction and maintenance access. Additionally, some valley locations may experience more frequent morning fog or mist conditions due to the proximity of the river. The ideal locations would balance accessibility, existing land use, grid connection potential, and topographical suitability while minimizing environmental impact. The moderately elevated agricultural areas to the west and southwest of Bom Retiro do Sul represent the most promising compromise between these various factors for large-scale solar PV 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.