Witmarsum, Santa Catarina, Brazil, located in the Southern Sub Tropics, shows moderate to good potential for year-round solar energy generation, though with notable seasonal variations that property owners should consider when planning solar installations.

Seasonal Solar Performance

The location experiences significant seasonal fluctuations in solar energy output. Summer delivers the strongest performance at 5.93 kWh per day per kW of installed solar capacity, making it the ideal time for maximum energy generation. Spring follows as the second-best season with 4.59 kWh per day per kW, while autumn produces 4.41 kWh per day per kW. Winter presents the most challenging period for solar generation, dropping to 3.37 kWh per day per kW of installed capacity. This represents a 43% reduction compared to summer output, which is typical for locations in the Southern Hemisphere where winter coincides with the sun's lower trajectory across the sky.

Optimal Installation Configuration

For fixed panel installations at Witmarsum, Santa Catarina, the ideal tilt angle to maximize total year-round solar production is 24 degrees facing North. This angle is calculated by analyzing daily solar elevation angles at this latitude, determining optimal panel positioning, and weighting these angles by daily photovoltaic potential using solar irradiance data while accounting for Earth's elliptical orbit.

Local Environmental Factors

Several environmental and weather factors in the Southern Sub Tropics region could potentially impact solar energy production at this location:

• High humidity levels typical of subtropical climates can reduce panel efficiency and create more frequent cleaning requirements
• Heavy rainfall during certain seasons may cause temporary reductions in solar output and increase the need for proper drainage systems
• Potential for severe weather events including strong winds and hail that could damage solar installations
• Dense vegetation growth in subtropical climates may create shading issues if not properly managed

Preventative Measures for Enhanced Production

Property owners can implement several strategies to maximize solar energy production despite these challenges: Regular cleaning schedules become essential in humid subtropical environments where dust, pollen, and organic matter accumulate more quickly on panel surfaces. Installing panels with adequate spacing allows for better air circulation, helping to reduce the efficiency losses associated with high humidity and temperature. Robust mounting systems designed to withstand strong winds and severe weather typical of the region will protect the investment and ensure consistent energy production. Proper drainage around solar installations prevents water accumulation that could lead to electrical issues or structural problems. Careful site selection and vegetation management help maintain optimal sun exposure throughout the year. This includes regular trimming of trees and bushes that might cast shadows on panels, particularly important given the seasonal changes in sun angle at this latitude. Installing monitoring systems allows property owners to quickly identify and address any performance issues, ensuring the solar installation operates at peak efficiency year-round despite the challenging subtropical environment.

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 Witmarsum

Seasonal solar PV output for Latitude: -26.9501, Longitude: -49.8559 (Witmarsum, 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 24° North in Witmarsum, Brazil

To maximize your solar PV system's energy output in Witmarsum, Brazil (Lat/Long -26.9501, -49.8559) throughout the year, you should tilt your panels at an angle of 24° 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 Witmarsum, 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 Witmarsum, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 24° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
11° North in Summer	33° North in Autumn	42° North in Winter	20° 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 Witmarsum, 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 Witmarsum, 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 Witmarsum, Brazil

Topographical Features of Witmarsum

Witmarsum is situated in the northern region of Santa Catarina state, nestled within the Itajaí River valley system. The town sits at an elevation of approximately 50 meters above sea level, positioned on gently rolling terrain that characterizes much of this coastal plain region. The landscape around Witmarsum consists primarily of low hills and shallow valleys, with gradual slopes that rarely exceed 15 degrees in most directions. The immediate area features a mix of agricultural land and scattered rural settlements, with the terrain becoming progressively more undulating as it extends toward the Serra Geral mountain range to the west. To the east, the land gradually flattens as it approaches the Atlantic coastal plain, creating a natural corridor that has been extensively developed for farming and small-scale industry. Local waterways include several tributaries of the Itajaí-Açu River system, which create modest valleys and wetland areas throughout the region. These water features generally follow north-south oriented drainage patterns, influenced by the gentle eastward slope of the terrain toward the ocean approximately 100 kilometers away.

Optimal Areas for Large-Scale Solar Development

The most promising locations for extensive solar photovoltaic installations lie on the elevated plateau areas southwest and west of Witmarsum. These zones offer relatively flat to gently sloping terrain with excellent southern exposure, while remaining sufficiently elevated to avoid seasonal flooding concerns that affect lower-lying areas near the river systems. The agricultural fields extending northward from the town present another excellent opportunity for solar development. This area features consistent topography with minimal tree cover and existing road infrastructure that would facilitate construction and maintenance access. The terrain slopes are generally less than 5 degrees, which reduces both construction complexity and ongoing operational challenges. Areas immediately south of Witmarsum also show strong potential, particularly the elevated farmland that extends toward the neighboring municipality of Pomerode. This region combines favorable topographical conditions with proximity to existing electrical transmission infrastructure, making it particularly attractive for utility-scale solar projects. The eastern approaches to town, while flatter in overall profile, may present some challenges due to the presence of wetland areas and seasonal water table fluctuations associated with the Itajaí River system. However, the higher ground between these water features could still accommodate smaller solar installations with appropriate site preparation and drainage considerations.

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.