Mejillones, Antofagasta, Chile is an excellent location for year-round solar energy generation, benefiting from its position in the Atacama Desert region where clear skies and intense sunlight are abundant throughout most of the year. The location produces strong solar output across all seasons, though with notable seasonal variation.

Seasonal Solar Performance

Summer delivers the highest energy production at 9.19 kWh per day per kW of installed solar capacity, making it the peak season for solar generation. Spring follows as the second-best performing season with 7.78 kWh per day per kW, while autumn produces 6.38 kWh per day per kW. Winter shows the lowest output at 4.55 kWh per day per kW, though this is still a respectable level of production for solar installations. The ideal times for solar generation at Mejillones are clearly during the warmer months, with summer and spring providing the most favorable conditions. However, even the winter months maintain reasonable production levels, making this location suitable for consistent year-round solar energy generation.

Optimal Panel Configuration

For maximum year-round energy production at this location, solar panels should be installed at a fixed tilt angle of 20 degrees facing North. This angle has been calculated to optimize total annual solar output by accounting for the sun's path throughout the year and the location's specific latitude.

Environmental and Weather Challenges

Despite the excellent solar conditions, several environmental factors at Mejillones could impact solar panel performance and require careful consideration during installation:

• Desert dust and sand accumulation - The arid desert environment generates significant amounts of fine dust and sand particles that can coat solar panels, reducing their efficiency
• Salt spray and corrosion - Being located near the Pacific coast, salt-laden air can cause corrosion of metal components and leave salt deposits on panel surfaces
• High UV exposure - The intense desert sunlight, while beneficial for energy production, can accelerate degradation of panel materials and mounting systems
• Temperature extremes - Desert conditions create significant temperature variations between day and night, causing thermal stress on equipment

Preventative Measures for Optimal Performance

To maximize energy production and system longevity at this location, several protective measures should be implemented: Regular cleaning schedules are essential, ideally using automated cleaning systems or frequent manual cleaning to remove dust and salt buildup from panel surfaces. Installing panels with anti-reflective coatings specifically designed for dusty environments can help maintain efficiency between cleanings. Choose corrosion-resistant materials for all mounting hardware and electrical components, particularly marine-grade aluminum or stainless steel fixtures that can withstand salt air exposure. Protective coatings on metal surfaces provide additional defense against coastal corrosion. Select solar panels and inverters rated for high UV exposure and extreme temperature variations. Proper ventilation around equipment and adequate spacing between panels helps manage heat buildup during peak sun hours. Consider implementing monitoring systems to track performance and identify when cleaning or maintenance is needed, ensuring the installation maintains optimal energy production throughout its operational life.

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

Link: Solar PV potential in Chile by location

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

Seasonal solar PV output for Latitude: -23.096, Longitude: -70.4505 (Mejillones, Chile), 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 Mejillones, Chile

To maximize your solar PV system's energy output in Mejillones, Chile (Lat/Long -23.096, -70.4505) 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 Mejillones, Chile

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 Mejillones, Chile. 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
7° North in Summer	28° North in Autumn	38° North in Winter	16° 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 Mejillones, Chile

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 Mejillones, Chile.

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 Mejillones, Chile

Topographical Features of Mejillones

Mejillones sits along Chile's northern coast in the Antofagasta Region, positioned where the Atacama Desert meets the Pacific Ocean. The immediate coastline features a relatively flat coastal plain that extends inland for several kilometers before giving way to the rising terrain of the Coastal Range. This coastal strip, where the town itself is located, sits at near sea level and provides a stable foundation with minimal elevation changes. Moving inland from the coast, the landscape transitions into gently rolling hills and then more pronounced ridges that form part of the Coastal Cordillera. These hills gradually increase in elevation as they extend eastward, creating a series of plateaus and mesa-like formations that are characteristic of this part of the Atacama Desert. The terrain becomes increasingly arid and barren as distance from the ocean increases, with sparse vegetation and exposed rocky surfaces dominating the landscape.

Geological and Climatic Characteristics

The region around Mejillones is defined by its extremely arid climate and stable geological conditions. The area receives minimal precipitation throughout the year, making it one of the driest places on Earth. This aridity has created a landscape largely free from the erosional patterns seen in wetter climates, resulting in relatively stable ground conditions and minimal vegetation cover. The coastal influence moderates temperatures somewhat compared to inland desert areas, though the region still experiences significant temperature variations between day and night. Fog from the Pacific Ocean occasionally reaches inland areas, particularly during certain seasons, though this phenomenon decreases rapidly with distance from the coast.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations lie on the elevated plateaus and gentle slopes located between 10 and 50 kilometers inland from Mejillones. These areas offer several key advantages for solar development, including stable, relatively flat terrain that minimizes construction challenges and reduces the need for extensive ground preparation. The inland plateaus benefit from reduced coastal fog influence while maintaining reasonable accessibility from existing infrastructure corridors. These elevated areas typically feature hard-packed desert surfaces with minimal loose sand or shifting terrain, providing excellent foundations for solar panel mounting systems. The natural drainage patterns in these areas also help prevent water accumulation during the rare precipitation events. Areas slightly further inland, extending toward the foothills of the Andes, present additional opportunities for solar development. These locations feature expansive flat areas with excellent ground stability and minimal environmental constraints. The terrain in these regions is typically characterized by exposed bedrock or well-consolidated sediments, ideal for supporting large solar installations.

Infrastructure and Access Considerations

The existing road network connecting Mejillones to inland mining operations provides a foundation for accessing potential solar development sites. The coastal highway system and various mining access roads create corridors that could support the transportation of equipment and materials needed for large-scale solar projects. The relatively flat coastal plain immediately around Mejillones, while easily accessible, may be less optimal for solar development due to occasional coastal fog and potential land use conflicts with urban and port activities. However, areas just beyond this coastal zone, where the terrain begins to rise toward the inland plateaus, offer an excellent compromise between accessibility and optimal solar conditions.

Chile solar PV Stats as a country

Chile ranks 22nd in the world for cumulative solar PV capacity, with 4,468 total MW's of solar PV installed. This means that 9.10% of Chile's total energy as a country comes from solar PV (that's 5th in the world). Each year Chile is generating 234 Watts from solar PV per capita (Chile ranks 21st in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Chile?

Yes, there are several incentives for businesses wanting to install solar energy in Chile. The Chilean government offers a range of financial incentives and tax credits for businesses that invest in renewable energy projects. These include grants, loans, and subsidies for the installation of solar panels. Additionally, businesses can benefit from net metering policies which allow them to sell excess electricity back to the grid at a premium rate. Finally, businesses may also be eligible for additional incentives such as reduced import duties on solar equipment or accelerated depreciation allowances on investments in renewable energy projects.

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