La Marsa, Tunis Governorate, Tunisia presents a moderately favorable location for year-round solar PV energy generation, though with significant seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Performance

The solar energy output at this Northern Temperate Zone location varies considerably throughout the year. Summer delivers the strongest performance at 7.34 kWh per day per kW of installed capacity, making it an excellent season for solar generation. Spring also provides good returns with 5.98 kWh per day per kW, representing the second-best performing season. However, the location shows notable limitations during cooler months. Autumn production drops to 4.02 kWh per day per kW, while winter reaches its lowest point at just 3.01 kWh per day per kW. This winter output represents less than half of the summer generation capacity, indicating that energy storage or grid-tied systems would be essential for consistent year-round power supply.

Optimal Installation Configuration

For maximum year-round energy production at La Marsa, Tunis Governorate, solar panels should be installed at a fixed tilt angle of 32 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's changing position throughout the year and weighting for the varying solar irradiance potential across all seasons.

Environmental and Weather Considerations

Several local factors could potentially impact solar production efficiency at this Mediterranean coastal location:

• Saharan dust storms can deposit fine sand particles on solar panels, reducing light transmission and energy output
• Salt air from the nearby Mediterranean Sea may cause corrosion of metal components and leave salt deposits on panel surfaces
• Occasional coastal fog and humidity can create temporary reductions in solar irradiance
• Strong Mediterranean winds, while generally beneficial for cooling panels, could potentially damage improperly secured installations

Preventative Measures for Enhanced Performance

To mitigate these environmental challenges and maximize energy production, several installation strategies should be considered: Regular cleaning schedules are essential, particularly during and after dust storm seasons. Installing panels with anti-soiling coatings can help reduce dust accumulation and make cleaning more effective. Using corrosion-resistant mounting hardware and electrical components rated for marine environments will help combat salt air effects. Proper panel spacing and mounting systems that allow adequate airflow can help manage humidity issues and keep panels cooler for better efficiency. Additionally, robust mounting systems designed to withstand high winds are crucial for long-term system reliability and safety. Installing monitoring systems can help identify when environmental factors are significantly impacting performance, allowing for timely maintenance interventions to restore optimal energy generation.

Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 53 locations across Tunisia. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Tunisia by location

Solar output per kW of installed solar PV by season in La Marsa

Seasonal solar PV output for Latitude: 36.8752, Longitude: 10.3341 (La Marsa, Tunisia), 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 32° South in La Marsa, Tunisia

To maximize your solar PV system's energy output in La Marsa, Tunisia (Lat/Long 36.8752, 10.3341) throughout the year, you should tilt your panels at an angle of 32° South 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 La Marsa, Tunisia

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 La Marsa, Tunisia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 32° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
21° South in Summer	41° South in Autumn	52° South in Winter	29° South 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 La Marsa, Tunisia

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 La Marsa, Tunisia.

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 La Marsa, Tunisia

Topographical Features of La Marsa

La Marsa sits along Tunisia's Mediterranean coastline, positioned on relatively low-lying terrain that rises gently from the sea. The area forms part of the broader Cap Bon peninsula region, characterized by rolling hills and coastal plains that create a varied but generally accessible landscape. The immediate vicinity around La Marsa features modest elevation changes, with the terrain gradually ascending from the shoreline toward the interior. The coastal zone where La Marsa is located consists primarily of sandy beaches backed by low cliffs and terraced land. Moving inland from the Mediterranean, the topography transitions into undulating hills with gentle slopes, interspersed with small valleys and depressions. These hills rarely exceed significant heights, creating a landscape that is neither mountainous nor completely flat. The region benefits from relatively stable geological conditions, with sedimentary rock formations underlying much of the area. The soil composition varies from sandy coastal deposits near the shore to more clay-rich soils further inland. Drainage patterns are generally well-established, with seasonal watercourses flowing toward the Mediterranean during wetter periods.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations lie inland from La Marsa, where the terrain becomes more expansive and less developed. The gently rolling hills approximately 10 to 20 kilometers southeast and southwest of La Marsa present ideal conditions for large solar arrays. These areas offer sufficient flat or gently sloping land that can accommodate the substantial footprint required for commercial-scale solar farms. The elevated plateaus and broad valley floors in this inland region provide excellent exposure to solar radiation while remaining accessible for construction and maintenance activities. The terrain here is stable enough to support heavy equipment and solar mounting systems, yet not so steep as to create engineering challenges or excessive grading requirements. Areas further from the immediate coastal zone also benefit from reduced salt air exposure, which can affect solar panel performance and longevity over time. The inland locations typically have fewer competing land uses compared to the more densely populated coastal strip, making land acquisition potentially more straightforward for large-scale development. The southeastern approaches toward the interior of the Cap Bon peninsula are particularly promising, where the landscape opens into broader agricultural plains with good road access. These locations combine the necessary topographical advantages with practical considerations such as proximity to existing electrical infrastructure and transportation networks that would be essential for solar farm construction and operation.

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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.