Willebroek, Flanders, Belgium, situated at 51.0606°N, 4.3636°E, presents a mixed picture for solar energy generation throughout the year. This location in the Northern Temperate Zone experiences significant seasonal variations in solar output, which impacts the overall effectiveness of photovoltaic (PV) systems.
Seasonal Solar Performance
The solar energy production in Willebroek varies dramatically across the seasons. Summer stands out as the most productive period, with an average daily output of 5.35 kWh per kW of installed solar capacity. Spring follows closely, generating 4.56 kWh/day. However, there's a sharp decline in autumn, with only 2.33 kWh/day, and winter sees the lowest production at a mere 1.17 kWh/day.
These figures indicate that solar energy generation is most effective from late spring through early autumn. During these months, longer daylight hours and higher sun angles contribute to increased solar panel efficiency. Conversely, the shorter days and lower sun angles of late autumn and winter significantly reduce solar output.
Optimal Panel Installation
To maximize year-round solar production in Willebroek, Flanders, fixed solar panels should be installed at a tilt angle of 43 degrees facing south. This angle is calculated to optimize the panels' exposure to sunlight throughout the year, considering the location's latitude and seasonal sun paths.
Environmental Considerations
While Willebroek's location doesn't present any extreme environmental challenges for solar production, there are a few factors to consider:
- Cloud cover: Belgium's climate is known for frequent cloud cover, which can reduce solar efficiency. Using high-quality panels designed to perform well in diffuse light conditions can help mitigate this issue.
- Rain and humidity: The region experiences significant rainfall. Ensuring proper panel tilt and using water-resistant components can prevent water accumulation and potential damage.
- Snow in winter: Although not typically heavy, snow can occasionally accumulate on panels. Installing panels at the recommended 43-degree angle helps with natural snow shedding.
To enhance solar production, regular cleaning of panels to remove dust and debris is advisable. Additionally, using microinverters or power optimizers can help maintain efficiency when some panels are partially shaded or covered.
In conclusion, while Willebroek's location presents challenges for year-round solar energy production, particularly in winter, it still offers substantial potential during the warmer months. With proper installation and maintenance, solar PV systems can be a viable renewable energy option in this Belgian town.
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 Willebroek
Seasonal solar PV output for Latitude: 51.0606, Longitude: 4.3636 (Willebroek, 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 43° South in Willebroek, Belgium
To maximize your solar PV system's energy output in Willebroek, Belgium (Lat/Long 51.0606, 4.3636) throughout the year, you should tilt your panels at an angle of 43° 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 Willebroek, 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 Willebroek, Belgium. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 43° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 35° South in Summer | 54° South in Autumn | 64° South in Winter | 43° 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 Willebroek, 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 Willebroek, Belgium.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Willebroek, Belgium
The area around Willebroek, Belgium, is characterized by a predominantly flat landscape. This region, located in the province of Antwerp, is part of the larger Flemish lowlands. The topography is generally very gentle, with minimal elevation changes across the area. The terrain is mostly composed of low-lying plains, with occasional small hills or slight undulations in the landscape.
The Willebroek area is situated in the Scheldt river basin, and the influence of water is evident in the local geography. Several smaller rivers and canals crisscross the region, including the Rupel River and the Brussels-Scheldt Maritime Canal. These waterways have shaped the landscape over time, contributing to the flat nature of the terrain and the presence of some marshy areas.
As for areas nearby that would be most suited to large-scale solar PV (photovoltaic) installations, there are a few factors to consider:
- Open agricultural land: The surrounding countryside, with its expansive farmlands, could potentially accommodate large solar arrays. These areas often have minimal shading from trees or buildings and offer the space required for substantial installations.
- Industrial zones: Willebroek and nearby towns have industrial areas that might be suitable for solar PV projects. Large warehouse rooftops or unused industrial lots could be repurposed for solar energy generation.
- Reclaimed land: Any former quarries, landfills, or brownfield sites in the region could be ideal for solar farms, as these areas are often flat and have limited alternative uses.
- Along transportation corridors: Areas adjacent to major roads or railway lines might be suitable, as they're often already cleared and have minimal ecological value.
It's important to note that while the flat terrain is generally favorable for solar PV installations, other factors such as local regulations, grid connection availability, and environmental considerations would need to be assessed for any specific project. Additionally, given Belgium's northern latitude, careful planning would be required to optimize the angle and spacing of solar panels to maximize energy capture throughout the year.
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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Wednesday 11th of September 2024
Last Updated: Monday 21st of July 2025
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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.




