Rubiataba, Goiás, Brazil presents an excellent location for year-round solar photovoltaic energy generation. Located in the tropical region at coordinates -15.1671, -49.8972, this area benefits from consistent sunlight throughout most of the year, with seasonal variations typically characterized by wet and dry periods rather than the dramatic temperature changes seen in temperate climates.

Solar Energy Production Potential

The solar energy output data for Rubiataba demonstrates remarkably consistent performance across all seasons. Spring offers the highest production at 6.28 kWh per day per kW of installed solar capacity, followed closely by summer at 6.08 kWh/day. Winter maintains strong output at 6.03 kWh/day, while autumn shows the lowest but still substantial production at 5.91 kWh/day per kW installed. This seasonal consistency makes Rubiataba an ideal location for solar installations, as the variation between the best and worst performing seasons is only about 6%. Such stability means solar systems can be relied upon for consistent energy production throughout the year, making financial planning and energy budgeting much more predictable. For fixed panel installations at this location, the optimal tilt angle to maximize total year-round solar production is 15 degrees facing North. This angle is calculated by analyzing daily solar elevation angles at the latitude, determining optimal panel positioning, and weighting these calculations using solar irradiance data while accounting for Earth's elliptical orbit.

Environmental and Weather Factors

Several local factors could potentially impact solar energy production in Rubiataba, Goiás, though the location remains highly favorable overall. Seasonal Rainfall Patterns: As a tropical location, Rubiataba experiences distinct wet and dry seasons. During the wet season, increased cloud cover and frequent rainfall can temporarily reduce solar irradiance. However, the seasonal production data already accounts for these weather patterns, and the relatively small variation in output suggests this impact is manageable. Dust and Particle Accumulation: The dry season in tropical Brazil can bring increased dust and particulate matter in the air, which can accumulate on solar panels and reduce their efficiency. Agricultural activities in the region may also contribute to airborne particles settling on panel surfaces. High Humidity and Temperature: Tropical climates typically feature high humidity and elevated temperatures, which can affect solar panel efficiency. Most photovoltaic panels experience reduced efficiency as temperatures rise above their optimal operating range.

Preventative Measures for Optimal Performance

Several installation strategies can help maximize solar energy production in Rubiataba's tropical environment:

• Regular cleaning schedules: Implement systematic panel cleaning, particularly during and after the dry season when dust accumulation is highest
• Adequate ventilation spacing: Install panels with sufficient air gap beneath them to promote cooling and reduce temperature-related efficiency losses
• Quality mounting systems: Use corrosion-resistant mounting hardware designed for high-humidity tropical environments
• Drainage considerations: Ensure proper water drainage around installations to prevent standing water during heavy rains

The consistently high solar output throughout the year, combined with proper installation techniques and maintenance practices, makes Rubiataba an exceptionally suitable location for solar photovoltaic systems. The minor seasonal variations and manageable environmental challenges are far outweighed by the location's abundant and reliable solar resource.

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 Rubiataba

Seasonal solar PV output for Latitude: -15.1671, Longitude: -49.8972 (Rubiataba, 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 15° North in Rubiataba, Brazil

To maximize your solar PV system's energy output in Rubiataba, Brazil (Lat/Long -15.1671, -49.8972) throughout the year, you should tilt your panels at an angle of 15° 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 Rubiataba, 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 Rubiataba, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 15° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
1° South in Summer	22° North in Autumn	31° North in Winter	10° 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 Rubiataba, 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 Rubiataba, 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 Rubiataba, Brazil

Topographical Features of Rubiataba Region

The landscape around Rubiataba in central Brazil is characterized by gently rolling hills and broad plateaus typical of the Brazilian Cerrado region. This area sits within the vast Central Brazilian Plateau, where elevations generally range between 800 and 1,200 meters above sea level. The terrain consists predominantly of undulating plains with occasional low ridges and shallow valleys carved by seasonal waterways.

The region experiences a gradual transition from higher elevations in the east toward slightly lower terrain as one moves westward. The topography is generally stable and well-drained, with soils that have developed over ancient crystalline rocks and sedimentary formations. The landscape lacks dramatic elevation changes, creating expansive areas of relatively flat to gently sloping terrain that extends for kilometers in all directions.

Drainage and Water Features

Several small rivers and seasonal streams traverse the area, creating shallow valleys that cut through the otherwise consistent plateau surface. These waterways flow generally northward toward the Tocantins River system, creating a network of gentle depressions in the landscape. During the dry season, many of these streams reduce to a trickle or dry up entirely, leaving behind sandy beds and gallery forests along their banks.

The drainage patterns have created a series of interfluves - the higher ground between river valleys - that provide extensive areas of well-drained terrain. These elevated areas between waterways offer the most stable and accessible land for development projects.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations lie on the broad interfluves and gentle slopes that dominate the regional landscape. These elevated areas between the river valleys provide several key advantages for solar development. The terrain is naturally well-drained, reducing concerns about seasonal flooding or waterlogging that could affect infrastructure.

The western and southwestern areas around Rubiataba present particularly favorable conditions, where the topography becomes even more uniform and the slopes are most gradual. These zones offer expansive tracts of land with consistent elevation and minimal variation in aspect, allowing for efficient panel layout and reduced grading requirements.

Areas to the north and northeast of the town also show promise, particularly on the higher plateau surfaces that remain well above the seasonal flood zones of local waterways. The stable geology underlying these areas provides excellent foundation conditions for large installations, while the gentle gradients facilitate both construction access and optimal panel orientation.

The relatively uniform nature of the terrain throughout the region means that most areas outside of the immediate river valleys and steeper hillsides could potentially accommodate solar development. However, the broad plateau areas offer the greatest efficiency for large-scale projects due to their consistent topography and minimal environmental constraints.

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.