Solar Energy Potential in Arlon, Wallonia, Belgium

Arlon, Wallonia, Belgium, located at 49.6871° N, 5.8236° E in the Northern Temperate Zone, presents a moderately viable location for solar PV energy generation, with significant seasonal variations. The energy production potential follows the typical northern European pattern of strong summers and weak winters. The seasonal electricity output per kilowatt of installed solar capacity shows substantial fluctuation throughout the year. Summer yields the highest production at 5.25 kWh per day, followed by spring with 4.69 kWh per day. Production decreases considerably in autumn to 2.58 kWh per day, and reaches its lowest point in winter at only 1.19 kWh per day.

Seasonal Variations and Optimal Generation Periods

The late spring through early autumn period (approximately May through September) represents the prime solar generation window for Arlon. During these months, the longer days and higher sun angles contribute to the substantially higher energy yields. The shoulder seasons (early spring and late autumn) provide moderate production, while the winter months from November through February offer minimal solar generation. This seasonal pattern means that solar installations in Arlon will produce approximately 77% more energy during summer than the annual average, and 65% more during spring. Conversely, winter production falls to about 65% below the annual average.

Optimal Panel Installation

For fixed solar panel installations in Arlon, Wallonia, the ideal tilt angle to maximize year-round production is 42 degrees facing South. This angle optimizes the annual electricity generation by balancing the seasonal variations in sun height and intensity throughout the year.

Environmental and Weather Considerations

Several environmental factors could potentially impact solar production in Arlon:

• Cloud cover and precipitation: The Belgian Ardennes region, where Arlon is located, experiences significant cloud cover throughout the year, particularly in winter months. Annual rainfall averages around 800-900mm, with precipitation distributed throughout the year.
• Snow accumulation: Winter snowfall can temporarily cover panels, reducing production during already low-yield periods.
• Fog and mist: The region can experience morning fog, particularly in valleys and during transitional seasons.

Preventative measures to optimize production despite these challenges include: Installing panels at the recommended 42-degree tilt, which helps shed snow more effectively than flatter installations. Using self-cleaning glass and anti-reflective coatings can minimize dirt accumulation and maximize light absorption. Regular maintenance, particularly clearing snow in winter, can help maintain production. Additionally, microinverters or power optimizers can help minimize production losses when portions of the array are shaded or covered. While Arlon's solar potential is moderate compared to sunnier southern European locations, properly installed and maintained systems can still provide significant energy contributions, particularly during the productive summer and spring seasons.

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

Link: Solar PV potential in Belgium by location

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

Seasonal solar PV output for Latitude: 49.6871, Longitude: 5.8236 (Arlon, Belgium), 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 42° South in Arlon, Belgium

To maximize your solar PV system's energy output in Arlon, Belgium (Lat/Long 49.6871, 5.8236) throughout the year, you should tilt your panels at an angle of 42° 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 Arlon, Belgium

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 Arlon, Belgium. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 42° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
33° South in Summer	52° South in Autumn	63° South in Winter	42° 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 Arlon, Belgium

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 Arlon, Belgium.

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 Arlon, Belgium

Arlon, situated in the southeastern part of Belgium in the province of Luxembourg, presents a varied topographical landscape characteristic of the Ardennes region. The terrain around Arlon is primarily characterized by gently rolling hills and plateaus, with elevations generally ranging between 350 and 450 meters above sea level. The city itself sits on a notable rise in the landscape, with its historic center perched on a hill overlooking the surrounding countryside. The area surrounding Arlon features a transition between the lower-lying plains to the west and the more pronounced hills of the Ardennes to the east and southeast. This transitional zone creates a diverse landscape with shallow valleys, modest ridges, and open agricultural fields interspersed with patches of forest. The Semois River and its tributaries have carved subtle valleys through this terrain, adding to the topographical complexity.

Potential Areas for Solar PV Development

When considering large-scale solar photovoltaic installations near Arlon, several topographical factors become important. The most suitable areas would typically be those with southern exposure, minimal shading, and relatively flat or gently sloping terrain that can accommodate extensive arrays without requiring significant earthworks. The agricultural plateaus to the north and northwest of Arlon present promising opportunities for solar development. These areas feature relatively flat terrain with good solar exposure and fewer forested sections that might cast shadows. The open farmland between Arlon and Attert, for instance, offers expansive spaces where solar installations could be integrated with agricultural activities. The slightly elevated areas to the southwest, in the direction of Virton, also merit consideration. Here, the gently undulating landscape provides numerous south-facing slopes that could optimize solar capture throughout the day. These areas benefit from their elevation, which reduces the risk of morning fog that sometimes affects the lower-lying regions. Less suitable are the more densely forested sections to the east toward the Luxembourg border, where the terrain becomes more variable and tree cover would create shading issues. Similarly, the steeper valley slopes along the Semois River system would present installation challenges and potentially suboptimal orientation for solar panels. The industrial zones on the outskirts of Arlon itself might offer opportunities for brownfield solar development, particularly in areas where existing infrastructure could support grid connections. These locations, while limited in size compared to rural options, would minimize the conversion of agricultural land. It's worth noting that the topography around Arlon creates microclimates with varying patterns of fog and cloud cover. The higher elevations generally experience clearer conditions than the valley bottoms, especially during autumn and winter months. This factor would favor solar installations on the more elevated plateaus rather than in the lower-lying areas where morning mist might be more persistent. The landscape's moderate relief generally means that most potential solar sites would require some degree of terrain adaptation, but nothing so extreme as to render projects technically unfeasible. The mosaic of open fields, scattered woodlands, and gentle hills provides numerous options for solar development, with the most promising sites being those that combine favorable topography with proximity to existing electrical infrastructure.

Belgium solar PV Stats as a country

Belgium ranks 19th in the world for cumulative solar PV capacity, with 6,585 total MW's of solar PV installed. This means that 6.60% of Belgium's total energy as a country comes from solar PV (that's 10th in the world). Each year Belgium is generating 569 Watts from solar PV per capita (Belgium ranks 5th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Belgium?

Yes, there are several incentives for businesses wanting to install solar energy in Belgium. The Belgian government offers a range of financial support measures for businesses that invest in renewable energy sources such as solar power. These include tax deductions, grants and subsidies, as well as access to low-interest loans. Additionally, the Flemish Energy Agency (VEA) provides free advice and guidance on how to make the most of these incentives.

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