Solar Energy Potential in Tarija, Bolivia

Tarija, Bolivia, located at latitude -21.5355 and longitude -64.7322, offers promising conditions for solar energy generation throughout the year. This tropical location benefits from relatively consistent sunlight patterns, though with some seasonal variations that affect solar productivity. The solar energy production potential in Tarija shows interesting seasonal patterns. During summer, solar panels can generate approximately 6.20 kWh per day for each kilowatt of installed capacity. This drops to 4.92 kWh/day in autumn, before rising slightly to 5.11 kWh/day in winter. Spring brings a significant boost, with production levels reaching 6.17 kWh/day, nearly matching summer performance.

Seasonal Variations and Optimal Generation Periods

The data reveals that Tarija experiences its peak solar generation potential during the summer and spring months. These seasons offer approximately 25% more energy production compared to autumn, which represents the lowest production period of the year. This pattern suggests that while Tarija benefits from year-round solar potential, there is still meaningful seasonal variation that should be considered when planning solar installations. For fixed solar panel installations in Tarija, the ideal tilt angle to maximize year-round production is 20 degrees facing North. This specific angle optimizes the capture of solar radiation throughout the year, accounting for the city's position in the Southern Hemisphere.

Environmental and Weather Considerations

Several environmental factors could potentially impact solar production in Tarija:

• Dust and dirt accumulation: Tarija's semi-arid climate can lead to dust buildup on panels, potentially reducing efficiency by 5-15% if not regularly maintained.
• Seasonal rainfall patterns: The distinct wet and dry seasons could affect panel cleanliness and cooling, with the rainy season potentially providing natural cleaning but also bringing cloud cover that reduces production.
• Temperature variations: While not extreme, temperature fluctuations can affect panel efficiency, as solar panels typically lose efficiency when operating at high temperatures.

Recommended Preventative Measures

To maximize solar energy production in Tarija, several preventative measures should be considered: Implementing regular cleaning schedules, especially during the dry season, can maintain optimal panel efficiency. Installing panels with sufficient elevation from the ground can minimize dust accumulation and potential shading from surrounding vegetation. Temperature management is also important. Ensuring adequate airflow behind panels by mounting them several inches above the roof or ground surface can help dissipate heat and maintain efficiency. Additionally, selecting panels with lower temperature coefficients can minimize production losses during hotter periods. Finally, considering a slight adjustment to the standard 20-degree tilt angle might be beneficial depending on whether the priority is maximizing wet-season or dry-season production, though the recommended angle provides the best year-round average.

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 13 locations across Bolivia. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Bolivia by location

Solar output per kW of installed solar PV by season in Tarija

Seasonal solar PV output for Latitude: -21.5355, Longitude: -64.7322 (Tarija, Bolivia), 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 20° North in Tarija, Bolivia

To maximize your solar PV system's energy output in Tarija, Bolivia (Lat/Long -21.5355, -64.7322) throughout the year, you should tilt your panels at an angle of 20° 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 Tarija, Bolivia

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 Tarija, Bolivia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 20° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
6° North in Summer	27° North in Autumn	37° North in Winter	15° 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 Tarija, Bolivia

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 Tarija, Bolivia.

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 Tarija, Bolivia

Tarija, Bolivia rests in a diverse topographical setting characterized by mountainous terrain, valleys, and plains. The city itself sits in a fertile valley at an elevation of approximately 1,850 meters above sea level, nestled within the eastern foothills of the Andes Mountains. This location places Tarija in a transitional zone between the higher Andean highlands to the west and the lower Chaco plains to the east. The surrounding landscape features significant elevation changes. To the west, the terrain rises into the rugged Eastern Cordillera of the Andes, with peaks reaching over 4,000 meters. These mountains create dramatic ridgelines and steep slopes that define the western horizon when viewed from Tarija. The mountain slopes are often carved by erosion, creating deep valleys and ravines that channel seasonal water flows.

Valley Systems

The Guadalquivir River flows through Tarija's valley, which extends in a roughly northwest to southeast direction. This valley system provides relatively flat terrain near the city center, gradually giving way to rolling hills and then steeper mountainsides as one moves away from the river. The valley floor contains alluvial soils deposited over centuries, contributing to the region's agricultural productivity. To the east and southeast of Tarija, the landscape gradually transitions to lower elevations as it approaches the Gran Chaco region. This transition zone features gentler hills and increasingly open terrain, with elevations descending to around 600-700 meters above sea level as one moves further east.

Solar PV Potential Areas

For large-scale solar photovoltaic development, several nearby areas present favorable conditions based on topographical considerations: The eastern and southeastern plains transitioning toward the Chaco region offer extensive flat or gently sloping terrain that would minimize grading and site preparation costs for solar installations. These areas receive strong solar radiation and have fewer topographical obstructions that might cast shadows across solar arrays. The elevated plateaus and mesas found in the transition zones between the valley and higher mountains also present opportunities. These areas typically have good exposure to sunlight throughout the day while avoiding the steeper slopes of mountainous regions that would complicate construction and maintenance. Some of the broader valley sections away from the immediate river floodplain could accommodate solar development. These areas benefit from relatively flat terrain while still being accessible from existing transportation infrastructure. The northern and northwestern approaches to Tarija, where the terrain becomes more open, also present potential sites for solar development. These areas feature a combination of gentle slopes and plateaus that would be conducive to large-scale installations.

Topographical Challenges

It's worth noting that the immediate mountainous areas west of Tarija present significant challenges for large-scale solar development due to steep slopes, potential geological instability, and difficult access conditions. Similarly, areas within the river's flood zone would face periodic inundation risks that would be incompatible with solar infrastructure. The region experiences seasonal rainfall patterns that can trigger erosion on steeper slopes, so ideal solar sites would be those with gentler gradients and stable soil conditions. The varied topography around Tarija means that site-specific assessments would be essential to identify the most suitable locations that balance favorable sun exposure with practical construction and maintenance considerations.

Bolivia solar PV Stats as a country

Bolivia ranks 76th in the world for cumulative solar PV capacity, with 170 total MW's of solar PV installed. Each year Bolivia is generating 15 Watts from solar PV per capita (Bolivia ranks 68th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Bolivia?

Yes, there are incentives for businesses wanting to install solar energy in Bolivia. The Bolivian government has implemented a number of policies and programs to promote the use of renewable energy sources such as solar power. These include tax exemptions, subsidies, and other financial incentives for businesses that invest in solar energy projects. Additionally, the government has established a Renewable Energy Fund which provides grants and loans to support renewable energy projects.

Do you have more up to date information than this on incentives towards solar PV projects in Bolivia? 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.