Kairouan, Tunisia presents a highly favorable location for year-round solar photovoltaic energy generation, positioned in the Northern Temperate Zone at coordinates 35.6717°N, 10.0917°E. This location demonstrates excellent solar potential with strong seasonal performance that makes it well-suited for consistent renewable energy production.

Seasonal Solar Performance

The solar energy output at Kairouan varies significantly across seasons, with summer providing peak generation at 7.86 kWh per day per kW of installed capacity. Spring follows as the second-best performing season at 6.33 kWh per day per kW, making these warmer months ideal for maximum solar energy harvest. Autumn production drops to 4.49 kWh per day per kW, while winter represents the lowest output period at 3.46 kWh per day per kW of installed solar capacity. Despite this winter reduction, the location maintains reasonable solar generation even during the least productive months.

Optimal Panel Configuration

For fixed panel installations at this location, the ideal tilt angle to maximize total year-round solar production is 31 degrees facing south. This angle has been calculated by analyzing daily solar elevation angles throughout the year, determining optimal panel positioning, and weighting these angles according to photovoltaic potential using solar irradiance data.

Environmental Challenges and Solutions

Several environmental factors at Kairouan could potentially impact solar panel performance and require careful consideration during installation planning. Sand and dust accumulation represents the most significant challenge for solar installations in this region. The proximity to the Sahara Desert means that fine sand particles and dust can settle on panel surfaces, reducing light transmission and decreasing energy output. Regular cleaning schedules become essential, with panels requiring washing every 2-4 weeks during dusty periods. Wind-blown sand can also cause micro-scratching on panel surfaces over time, gradually reducing their efficiency. Installing panels with anti-reflective coatings specifically designed for desert environments can help minimize this degradation.

Preventative Installation Measures

Several installation strategies can help maximize energy production despite these environmental challenges:

• Install automated cleaning systems or schedule regular manual cleaning to remove dust and sand buildup
• Choose panels with enhanced anti-reflective and scratch-resistant coatings suitable for desert conditions
• Ensure adequate spacing between panel rows to allow natural wind cleaning and reduce sand accumulation
• Install robust mounting systems designed to withstand occasional sandstorms and strong desert winds
• Consider tracking systems that can be programmed to position panels to minimize sand accumulation during dust storms

The occasional occurrence of sandstorms during spring months may temporarily reduce solar output, but these events are typically brief and normal production resumes quickly afterward. Proper system design and maintenance protocols can effectively address these challenges while maintaining strong year-round solar energy generation at this location.

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 Kairouan

Seasonal solar PV output for Latitude: 35.6717, Longitude: 10.0917 (Kairouan, 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 31° South in Kairouan, Tunisia

To maximize your solar PV system's energy output in Kairouan, Tunisia (Lat/Long 35.6717, 10.0917) throughout the year, you should tilt your panels at an angle of 31° 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 Kairouan, 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 Kairouan, Tunisia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 31° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
20° South in Summer	40° South in Autumn	51° South in Winter	28° 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 Kairouan, 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 Kairouan, 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 Kairouan, Tunisia

Topographical Features Around Kairouan

The landscape surrounding Kairouan is characterized by relatively flat to gently undulating terrain typical of Tunisia's central plains region. This ancient city sits within the Sahel coastal plain that extends inland from the Mediterranean coast, creating a predominantly level topography with gradual elevation changes across the area.

The terrain consists mainly of low-lying plains and gentle hills, with elevations generally ranging from 50 to 200 meters above sea level. The landscape is punctuated by occasional low ridges and shallow depressions, but overall maintains a fairly consistent and manageable gradient. The soil composition includes a mixture of alluvial deposits and sedimentary formations that have created stable ground conditions across much of the region.

Water features in the area are limited, with seasonal watercourses and occasional salt flats scattered throughout the landscape. The region experiences a semi-arid climate that has shaped the topography over millennia, resulting in relatively sparse vegetation cover and exposed terrain that offers clear sightlines across considerable distances.

Optimal Areas for Large-Scale Solar Development

The expansive flat plains extending southwest and southeast of Kairouan present the most promising locations for large-scale solar photovoltaic installations. These areas benefit from minimal topographical obstacles and consistent terrain that would facilitate efficient panel placement and maintenance access. The gentle slopes in these directions provide natural drainage while maintaining optimal angles for solar collection.

The northwestern quadrant around Kairouan also offers suitable conditions, with broad stretches of level ground that could accommodate extensive solar arrays. The relatively uniform elevation changes in this area would minimize the need for significant grading or terrain modification, reducing installation costs and environmental impact.

Areas immediately north and northeast of the city, while topographically suitable, may present more constraints due to existing agricultural activities and proximity to established settlements. The southern approaches toward the Saharan regions offer particularly attractive prospects, with vast open spaces and minimal competing land uses that could support very large solar installations.

The stable geological conditions throughout the region provide excellent foundations for solar infrastructure, while the generally clear terrain offers minimal shading concerns from natural features. The low population density in the surrounding rural areas means that large tracts of land could potentially be developed without significant displacement of existing communities or economic activities.

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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.