San Juan, Argentina, located in the Southern Sub Tropics at latitude -31.5353 and longitude -68.531, offers favorable conditions for solar energy generation throughout the year, though with seasonal variations. This location experiences strong solar potential, particularly during summer and spring months.

Seasonal Solar Production

The solar energy production in San Juan varies significantly across the seasons. Summer delivers the highest output at 8.24kWh per day for each kilowatt of installed capacity. Spring follows closely behind with 7.92kWh/day. Production decreases considerably during autumn (5.09kWh/day) and reaches its lowest point in winter (4.30kWh/day).

This seasonal pattern creates a somewhat uneven production profile throughout the year, with summer generating nearly twice the energy of winter. However, even during winter months, the production remains substantial enough to make solar installations worthwhile.

Optimal Installation Angle

For fixed panel installations in San Juan, the ideal tilt angle to maximize year-round solar production is 28 degrees facing North. This specific angle has been calculated by analyzing the daily solar elevation patterns at this latitude, accounting for Earth's elliptical orbit, and weighting these factors against NASA's solar irradiance data.

Environmental and Weather Considerations

San Juan's location in the rain shadow of the Andes mountains creates a semi-arid climate that is generally beneficial for solar production, with abundant clear days. However, several factors can impact solar generation:

• Dust and dirt accumulation is significant in this semi-arid region, potentially reducing panel efficiency by 10-30% if not regularly cleaned
• Occasional summer thunderstorms can bring hail that poses a risk to panel integrity
• The region experiences föhn winds locally known as "Zonda winds," which carry dust that can coat panels

Preventative measures include installing panels with tempered glass that can withstand moderate hail impacts, implementing automated or regular manual cleaning schedules, and considering tracking systems that can position panels vertically during dust storms to minimize accumulation. Additionally, slightly increasing the tilt angle beyond the mathematical optimum may promote natural cleaning during rainfall events.

Overall, San Juan represents a very good location for solar energy production, with its high radiation levels and relatively mild winter conditions making it suitable for year-round generation, despite the seasonal variations.

Note: The Southern Sub Tropics extend from -23.5° latitude South down to -35° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 519 locations across Argentina. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Argentina by location

Solar output per kW of installed solar PV by season in San Juan

Seasonal solar PV output for Latitude: -31.5353, Longitude: -68.531 (San Juan, Argentina), 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 28° North in San Juan, Argentina

To maximize your solar PV system's energy output in San Juan, Argentina (Lat/Long -31.5353, -68.531) throughout the year, you should tilt your panels at an angle of 28° 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 San Juan, Argentina

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 San Juan, Argentina. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 28° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
15° North in Summer	37° North in Autumn	46° North in Winter	25° 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 San Juan, Argentina

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 San Juan, Argentina.

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 San Juan, Argentina

The topography around San Juan, Argentina is characterized by dramatic contrasts and diverse landscapes that reflect the region's position at the eastern foothills of the Andes Mountains. San Juan city itself sits in a wide valley at approximately 650 meters above sea level, nestled between impressive mountain ranges that define the region's geography. To the west of San Juan rise the imposing Andes Mountains, creating a spectacular backdrop with peaks that can exceed 5,000 meters in elevation. These mountains form a natural border with Chile and contribute significantly to the region's climate patterns by blocking moisture from the Pacific Ocean, resulting in the area's semi-arid conditions. The Pre-Cordillera, a series of smaller mountain ranges, serves as a transition zone between the high Andes and the valleys where human settlement is concentrated.

Valley Systems and Plains

The Tulum Valley, where San Juan city is located, represents one of several fertile valleys that punctuate the otherwise rugged terrain. This valley, along with others like Ullum, Zonda, and Calingasta, forms part of a system of depressions that run roughly north-south through the province. These valleys have historically been the focus of agricultural activity, supported by irrigation from rivers flowing down from the Andes. East of San Juan, the landscape gradually transitions to the vast plains that eventually merge with the Pampas region. This eastern zone features gentler topography with rolling hills and flatlands that extend toward neighboring provinces.

River Systems

The San Juan River is the principal watercourse in the region, flowing from the Andes eastward through the city. This river and its tributaries have carved significant valleys and canyons through the mountainous terrain over millennia. The river system has been harnessed for both irrigation and hydroelectric power, with several dams including Ullum and Punta Negra creating artificial lakes in the landscape.

Ideal Areas for Solar PV Development

For large-scale solar photovoltaic development, several areas around San Juan present exceptional opportunities due to their topographical and climatic characteristics: The eastern plains of San Juan Province offer vast stretches of relatively flat terrain that would minimize site preparation costs for solar installations. These areas receive abundant solar radiation throughout the year and have fewer geographical obstacles than the mountainous western regions. The Tulum Valley, outside of agricultural zones, contains extensive areas of flat, unproductive land that could be repurposed for solar energy production. The valley's position, sheltered by mountains but with clear exposure to the sun, creates favorable conditions for consistent solar energy capture. The Ullum-Zonda corridor, northwest of San Juan city, represents another promising location. This area combines favorable topography with proximity to existing electrical infrastructure, reducing transmission costs for new solar developments. Higher elevation plateaus and terraces in the Pre-Cordillera region, while more challenging to access, offer exceptional solar exposure with minimal cloud cover throughout the year. These areas typically have lower agricultural value and less competition for land use. The Bermejo-Vinchina basin to the north of San Juan also presents significant potential, with extensive flat areas that receive minimal precipitation and experience limited cloud cover. The sparse vegetation and minimal agricultural use make this region particularly suitable for large-scale solar development. San Juan's diverse topography ultimately provides numerous options for solar PV deployment, with the eastern and central valleys offering the best combination of flat terrain, excellent solar exposure, and proximity to existing infrastructure and population centers.

Argentina solar PV Stats as a country

Argentina ranks 43rd in the world for cumulative solar PV capacity, with 1,071 total MW's of solar PV installed. This means that 1.50% of Argentina's total energy as a country comes from solar PV (that's 35th in the world). Each year Argentina is generating 24 Watts from solar PV per capita (Argentina ranks 63rd in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Argentina?

Yes, there are several incentives for businesses wanting to install solar energy in Argentina. The government offers a range of tax credits and subsidies for businesses that invest in renewable energy projects. Additionally, the country has implemented a net metering system which allows businesses to sell excess electricity generated from their solar installations back to the grid at a premium rate. Finally, the government also provides access to low-interest loans and grants for businesses looking to invest in solar energy projects.

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