Barreirinhas, Maranhão, Brazil represents an excellent location for year-round solar photovoltaic energy generation. Located in the tropical region at coordinates -2.7215, -42.8939, this area benefits from consistent sunlight throughout the year, with seasons characterized more by wet and dry periods rather than the temperature variations seen in temperate climates.

Solar Energy Production Potential

The solar energy output at Barreirinhas demonstrates remarkably consistent performance across all seasons. During summer months, solar panels can be expected to generate 5.84 kWh per day for each kilowatt of installed capacity. Autumn production remains similarly strong at 5.75 kWh/day per kW, making it the lowest production season but still maintaining excellent output levels. Winter brings improved performance with 6.10 kWh/day per kW, while spring emerges as the optimal season for solar generation, delivering an impressive 6.93 kWh/day per kW of installed solar capacity. This seasonal pattern makes spring the ideal time for maximum solar energy production at this location. For optimal year-round energy production, fixed solar panels should be installed with a tilt angle of 3 degrees North. This specific angle has been calculated to maximize total annual solar output by accounting for the sun's path throughout the year and the location's proximity to the equator.

Environmental and Weather Challenges

Several environmental factors at Barreirinhas could potentially impact solar energy production and require careful consideration during installation planning. The tropical climate brings significant rainfall during wet seasons, which can reduce solar irradiance and create challenges for panel maintenance. Heavy rains may also lead to increased humidity levels that could affect electrical components over time. Additionally, the coastal proximity of Barreirinhas introduces salt air exposure, which can cause corrosion of metal components and reduce the lifespan of solar installations if not properly addressed. Dust accumulation during dry periods represents another concern, as particles can settle on panel surfaces and reduce light transmission. The tropical environment also supports abundant vegetation growth, which could create shading issues if not properly managed during site selection and ongoing maintenance.

Preventative Measures for Optimal Performance

Several installation strategies can help maximize solar energy production despite these environmental challenges:

• Install panels with corrosion-resistant aluminum or stainless steel mounting systems specifically designed for coastal environments
• Apply protective coatings to all metal components to prevent salt air corrosion
• Design installations with adequate drainage to prevent water pooling during heavy rains
• Implement regular cleaning schedules to remove dust and debris accumulation
• Choose high-quality electrical components with appropriate weatherproof ratings for tropical conditions

Proper site selection plays a crucial role in avoiding potential shading from existing or future vegetation growth. Installing panels at sufficient height and maintaining clear zones around installations helps ensure unobstructed sunlight access throughout the day. Regular maintenance programs become particularly important in tropical environments like Barreirinhas. These should include periodic cleaning, inspection of electrical connections for corrosion, and vegetation management to maintain optimal performance levels throughout the year.

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 Barreirinhas

Seasonal solar PV output for Latitude: -2.7215, Longitude: -42.8939 (Barreirinhas, 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 3° North in Barreirinhas, Brazil

To maximize your solar PV system's energy output in Barreirinhas, Brazil (Lat/Long -2.7215, -42.8939) throughout the year, you should tilt your panels at an angle of 3° 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 Barreirinhas, 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 Barreirinhas, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 3° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
13° South in Summer	9° North in Autumn	18° North in Winter	3° South 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 Barreirinhas, 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 Barreirinhas, 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 Barreirinhas, Brazil

Topographical Features of Barreirinhas

Barreirinhas sits in the northeastern state of Maranhão, positioned along the Preguiças River delta where it meets the Atlantic Ocean. The town serves as the gateway to the renowned Lençóis Maranhenses National Park, one of Brazil's most distinctive landscapes. The immediate area around Barreirinhas is characterized by low-lying coastal plains with minimal elevation changes, creating a relatively flat terrain that extends inland from the ocean. The region's most striking topographical feature consists of vast expanses of white sand dunes that rise and fall in gentle undulations across the landscape. These dunes, formed by coastal winds carrying sand inland over thousands of years, create a unique desert-like environment despite the area's tropical climate. Between the dunes, seasonal lagoons form during the rainy months, creating temporary bodies of crystal-clear water that contrast dramatically with the surrounding white sands. The coastal zone near Barreirinhas features extensive beaches backed by dune systems that can reach heights of up to 40 meters above sea level. Moving inland, the topography transitions from active coastal dunes to more stabilized sandy areas interspersed with patches of restinga vegetation - a type of coastal scrubland adapted to sandy soils and salt-laden winds.

River Systems and Wetlands

The Preguiças River meanders through the region, creating a network of channels, oxbow lakes, and wetland areas that provide important ecological habitats. The river's influence extends well inland, with its tributaries creating a dendritic pattern of waterways that dissect the sandy terrain. These river valleys represent some of the lowest elevations in the area, often sitting just a few meters above sea level. Mangrove ecosystems flourish along the river channels and in areas where freshwater meets saltwater influence from the ocean. These wetland areas create pockets of different topographical character within the broader sandy landscape, featuring mudflats, tidal channels, and areas of seasonal flooding that would be unsuitable for large infrastructure projects.

Optimal Areas for Solar Development

The most suitable locations for large-scale solar photovoltaic installations around Barreirinhas would be the stabilized sandy plateaus that lie inland from the active coastal dune systems. These areas offer relatively flat terrain with good drainage characteristics, reducing concerns about seasonal flooding or shifting sands that could affect solar panel installations. The transitional zones between the dramatic dune fields of Lençóis Maranhenses and the more vegetated interior regions present particularly attractive conditions for solar development. These areas typically feature gentle slopes and stable ground conditions while remaining easily accessible from existing road networks. The sandy soil composition provides excellent drainage, preventing water accumulation that could damage electrical infrastructure. Areas located south and southwest of Barreirinhas town center would be especially well-suited for solar installations. This direction moves away from the most environmentally sensitive dune ecosystems while maintaining the flat topography ideal for solar panel arrays. The terrain in these areas consists of consolidated sandy plains with sparse vegetation cover, minimizing environmental disruption during construction. The elevated sandy plateaus that rise gradually from the river valleys offer another promising option for solar development. These slightly higher elevations provide natural drainage while avoiding the wetland areas and seasonal flood zones associated with the river system. The stable nature of these consolidated sand formations reduces foundation challenges that might be encountered in more active dune areas. When selecting specific sites, areas with minimal slope variation and good access to existing transportation infrastructure would be preferable. The relatively uniform topography across much of the region means that large solar installations could be developed with minimal grading or terrain modification, reducing both construction costs and environmental impact.

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.