Guarabira, Paraíba, Brazil offers a promising location for solar PV energy generation, situated in the tropical region where sunlight remains fairly consistent throughout the year. This northeastern Brazilian city experiences seasonal variations that affect solar production, though not as dramatically as locations in higher latitudes.

Seasonal Solar Production

The solar energy potential in Guarabira varies across the meteorological seasons, with spring showing the highest productivity at 7.14 kWh per day for each kilowatt of installed capacity. Summer follows with 6.36 kWh/day, while autumn generates 5.95 kWh/day. Winter represents the least productive season, though still respectable at 5.41 kWh/day per installed kilowatt.

Spring (September to November) stands out as the optimal period for solar generation in Guarabira, Paraíba, likely due to clear skies and moderate temperatures. The relatively small variation between seasons—with winter production still reaching about 76% of spring's peak output—indicates that solar power remains viable year-round at this location.

Optimal Panel Installation

For fixed solar panel installations in Guarabira, Paraíba, the ideal tilt angle to maximize year-round energy production is 6 degrees facing North. This slight tilt optimizes exposure to the sun's path throughout the year at this near-equatorial latitude, balancing seasonal variations to capture maximum sunlight across all seasons.

Environmental and Weather Considerations

Several factors could potentially impact solar production in Guarabira:

• Heavy rainfall during the wet season (typically April to July) may reduce solar efficiency due to cloud cover and potential panel soiling
• High humidity levels throughout the year can create condensation on panels, temporarily reducing efficiency
• Occasional dust storms during dry periods may accumulate dirt on panel surfaces

To mitigate these challenges, solar installations in Guarabira should incorporate several preventative measures. Regular cleaning schedules are essential, particularly during the dry season when dust accumulation is highest. Installing panels with self-cleaning hydrophobic coatings can help shed water and reduce dirt buildup. Additionally, elevating panels slightly higher than standard installations can minimize the impact of ground-level dust, while ensuring proper drainage systems prevents water accumulation during heavy rains.

Despite these considerations, Guarabira's consistent solar radiation throughout the year makes it a favorable location for solar PV installations, with even the least productive winter months delivering substantial energy output.

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 Guarabira

Seasonal solar PV output for Latitude: -6.8829, Longitude: -35.4432 (Guarabira, 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 6° North in Guarabira, Brazil

To maximize your solar PV system's energy output in Guarabira, Brazil (Lat/Long -6.8829, -35.4432) throughout the year, you should tilt your panels at an angle of 6° 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 Guarabira, 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 Guarabira, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 6° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
9° South in Summer	13° North in Autumn	23° North in Winter	1° 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 Guarabira, 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 Guarabira, 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 Guarabira, Brazil

Guarabira is situated in the northeastern Brazilian state of Paraíba, nestled in a region characterized by a diverse topographical landscape. The area features a mix of rolling hills, valleys, and moderate elevations that transition between the coastal plains to the east and the higher terrain of the interior to the west. The city itself sits at an elevation of approximately 150 meters above sea level, surrounded by a series of undulating hills that create a partially enclosed basin. The topography around Guarabira is part of the Borborema Plateau's eastern slopes, where the terrain gradually descends toward the Atlantic Ocean. This transitional zone creates a varied landscape with hills ranging from 100 to 400 meters in elevation. The region's relief is marked by rounded hilltops and broad valleys carved by seasonal waterways. This hilly character gives the area its distinctive appearance, with the urban center of Guarabira spreading across both lowlands and adjacent slopes.

Hydrography and Natural Features

The area's topography influences its hydrographic network, with several small rivers and streams flowing through the valleys around Guarabira. The Mamanguape River basin encompasses much of the region, with tributaries following the natural contours of the land. During rainy seasons, these waterways can swell significantly, while in drier periods, many become intermittent. Vegetation in the region reflects the transition between the Atlantic Forest and Caatinga biomes, with more lush growth in the valleys and lower-lying areas, while the higher elevations and western portions show increasingly drought-resistant species. This vegetative pattern closely follows the topographical variations and associated microclimates.

Optimal Areas for Solar PV Development

For large-scale solar photovoltaic installations, the most suitable areas near Guarabira would be the gently sloping plateaus and broader hilltops to the west and southwest of the city. These areas combine several advantageous characteristics: The elevated plateaus west of Guarabira, extending toward Areia and Esperança, offer relatively flat expanses at higher elevations (200-350 meters) with minimal shading from surrounding terrain. These locations receive consistent solar exposure throughout the day due to their elevated position above potential morning or evening shadow-casting features. The northern approaches to Guarabira, toward Pirpirituba, also present favorable conditions with gradually sloping terrain that generally faces north-northeast, maximizing solar exposure in the Southern Hemisphere. These areas typically have less dense vegetation and drier soil conditions, reducing land preparation costs. Areas to the south, in the direction of Mulungu, feature some broader valley floors and gentler slopes that could accommodate larger installations while requiring minimal earthwork. The natural contours in these zones would allow for efficient panel arrangement with consistent orientation. The least suitable areas would be the steeper eastern slopes with their more fragmented terrain, deeper valleys, and increased vegetation density. Additionally, lowlands prone to seasonal flooding along the river courses should be avoided for solar development, as should areas with cultural or environmental significance. The region's topography, while moderately complex, offers numerous viable sites for solar development within a 30-kilometer radius of Guarabira, with the western and southwestern zones presenting the optimal balance of favorable terrain, accessibility, and solar exposure potential.

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.