Iaciara, Goiás, Brazil presents an excellent location for year-round solar photovoltaic energy generation. Located in the tropics at coordinates -14.0819, -46.7211, this region benefits from consistent sunlight throughout most of the year, with seasonal variations characterized more by wet and dry periods rather than the dramatic temperature and daylight changes seen in temperate climates.

Solar Energy Production Performance

The solar energy output at Iaciara demonstrates remarkably consistent performance across all seasons. The location generates between 5.86 and 6.31 kWh per day for each kW of installed solar capacity, showing only modest seasonal variation of about 7.7% between the lowest and highest production periods. Spring emerges as the peak production season, delivering 6.31 kWh/day per kW of installed capacity. Autumn follows closely with 6.18 kWh/day, while winter maintains strong performance at 6.01 kWh/day. Summer shows the lowest output at 5.86 kWh/day, though this still represents excellent solar generation potential. For optimal year-round energy production, solar panels at this location should be installed at a fixed tilt angle of 14 degrees facing north. This angle maximizes 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 Factors

Several local factors could potentially impact solar energy production at Iaciara and require consideration during installation planning. The tropical climate brings distinct wet and dry seasons, with the wet season potentially creating challenges for solar installations. Heavy rainfall and increased humidity during wet periods can reduce solar panel efficiency and create maintenance concerns. However, the frequent rain can also provide natural cleaning of solar panels, removing dust and debris that might otherwise accumulate. Dust accumulation presents a significant concern, particularly during the dry season when rainfall is minimal. The region's location in central Brazil, with its mix of agricultural activity and natural vegetation, can generate considerable airborne particles that settle on solar panels and reduce their efficiency over time. High temperatures, common in tropical regions, can also impact solar panel performance. While solar panels need sunlight to generate electricity, excessive heat can actually reduce their efficiency, as photovoltaic cells become less effective at higher temperatures.

Preventative Measures for Optimal Performance

Several installation strategies can help maximize solar energy production while mitigating local environmental challenges:

• Install panels with adequate spacing and ventilation underneath to promote air circulation and reduce heat buildup
• Use mounting systems that allow for proper drainage during heavy rainfall periods
• Implement regular cleaning schedules, particularly during dry seasons when dust accumulation is highest
• Consider anti-reflective and self-cleaning coatings on panels to reduce maintenance requirements
• Install monitoring systems to track performance and identify when cleaning or maintenance is needed

The consistent high solar output throughout the year makes Iaciara an ideal location for solar energy investment, with proper installation and maintenance practices ensuring optimal long-term performance despite the tropical climate challenges.

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 Iaciara

Seasonal solar PV output for Latitude: -14.0819, Longitude: -46.7211 (Iaciara, 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 14° North in Iaciara, Brazil

To maximize your solar PV system's energy output in Iaciara, Brazil (Lat/Long -14.0819, -46.7211) throughout the year, you should tilt your panels at an angle of 14° 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 Iaciara, 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 Iaciara, Brazil. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 14° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
2° South in Summer	20° North in Autumn	30° North in Winter	9° 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 Iaciara, 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 Iaciara, 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 Iaciara, Brazil

Topographical Features of the Iaciara Region

Iaciara is situated in the western portion of Goiás state, Brazil, within the expansive Brazilian Highlands that characterize much of the country's central plateau region. The terrain around this municipality consists predominantly of gently rolling hills and elevated plains that sit approximately 400 to 600 meters above sea level. This landscape forms part of the broader Planalto Central, a vast elevated plateau that extends across central Brazil.

The topography exhibits a relatively moderate relief with gradual elevation changes rather than steep mountainous terrain. Rolling hills create a undulating landscape punctuated by shallow valleys carved by seasonal watercourses and tributaries that eventually drain toward the Tocantins River system. The geological foundation consists primarily of ancient crystalline rocks overlain by sedimentary deposits, creating stable ground conditions across much of the area.

Vegetation in the region transitions between cerrado savanna and patches of gallery forest along waterways. The cerrado landscape features scattered trees and shrubs over grasslands, while denser forest formations occupy the moister valley bottoms and areas with better soil conditions. This natural vegetation pattern reflects the underlying topographical variations and drainage characteristics of the terrain.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations would be found on the broader plateau areas and gentle hillslopes that dominate the landscape surrounding Iaciara. These elevated plains offer several advantages including relatively flat to gently sloping terrain that minimizes earthwork requirements during construction while providing excellent drainage to prevent water accumulation around solar arrays.

Areas with south-facing slopes would be particularly advantageous for solar installations, as these orientations maximize exposure to the sun throughout the day in this southern hemisphere location. The rolling hill terrain provides numerous such opportunities where large solar farms could be positioned to take advantage of optimal slope angles and orientations.

The stable geological conditions of the plateau region make it well-suited for supporting the infrastructure requirements of major solar installations. The crystalline basement rocks provide solid foundations for mounting systems and electrical infrastructure, while the moderate topographical relief allows for efficient road access and grid connections without requiring extensive engineering solutions for steep terrain.

Locations away from the gallery forests and riparian zones would be preferable for solar development, both from environmental conservation perspectives and practical considerations. The more open cerrado areas on higher ground offer fewer ecological constraints while providing the clear sight lines and minimal shading that large-scale solar arrays require for optimal performance.

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.