Solar PV Analysis of Le Chesnay, France
Le Chesnay, France, located at latitude 48.8248 and longitude 2.1222, presents a mixed picture for year-round solar energy generation. This Northern Temperate Zone location experiences significant seasonal variations in solar output, which impacts the overall efficiency of photovoltaic (PV) systems throughout the year.
Seasonal Solar Performance
Solar energy production in Le Chesnay peaks during the summer months, with an impressive average daily output of 5.56 kWh per kW of installed capacity. Spring follows closely behind, generating 4.97 kWh/day. However, there's a sharp decline in autumn, with production dropping to 2.89 kWh/day. Winter sees the lowest output, managing only 1.34 kWh/day on average.
These figures highlight the substantial difference between summer and winter production, with summer generating more than four times the energy of winter days. This variation is primarily due to the changing daylight hours and sun angle throughout the year.
Optimal Installation Angle
To maximize year-round solar energy production in Le Chesnay, fixed solar panels should be installed at a tilt angle of 42 degrees facing south. This angle has been calculated to optimize the capture of available sunlight across all seasons, balancing the high summer sun with the lower winter sun angle.
Environmental and Weather Considerations
While Le Chesnay's climate is generally favorable for solar energy, there are some factors that could impact production:
- Cloud cover: The region experiences frequent cloudy days, especially in autumn and winter, which can reduce solar output.
- Snow: Occasional winter snowfall can temporarily cover panels, though this is typically not a major concern.
To mitigate these issues, consider installing panels with anti-soiling coatings to reduce snow accumulation and ensure easy cleaning. Additionally, using microinverters or power optimizers can help maintain efficiency during partial shading conditions caused by cloud cover.
Conclusion
While Le Chesnay isn't ideal for year-round solar production due to its significant seasonal variations, it still offers good potential, especially from spring through autumn. With proper installation techniques and equipment choices, a solar PV system can provide substantial energy contributions, particularly during the longer, sunnier days of the year.
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 627 locations across France. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in France by location
Solar output per kW of installed solar PV by season in Le Chesnay
Seasonal solar PV output for Latitude: 48.8248, Longitude: 2.1222 (Le Chesnay, France), 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 Le Chesnay, France
To maximize your solar PV system's energy output in Le Chesnay, France (Lat/Long 48.8248, 2.1222) 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 Le Chesnay, France
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 Le Chesnay, France. 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 |
|---|---|---|---|
| 32° South in Summer | 52° South in Autumn | 62° South in Winter | 41° 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 Le Chesnay, France
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 Le Chesnay, France.
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 Le Chesnay, France
The area around Le Chesnay, France, is characterized by gently rolling terrain typical of the Île-de-France region. Located in the western suburbs of Paris, Le Chesnay sits on a plateau that gradually slopes towards the Seine River to the east. The landscape is a mix of urban development and pockets of green spaces, with subtle elevation changes throughout the area.
To the west of Le Chesnay, the terrain becomes slightly more varied as it transitions into the forested areas of Versailles and Marly-le-Roi. Here, you'll find modest hills and shallow valleys, creating a more diverse topography. The famous Palace of Versailles and its expansive gardens are situated just south of Le Chesnay, contributing to the area's undulating landscape.
Regarding large-scale solar PV installations, the most suitable areas nearby would likely be found to the southwest of Le Chesnay, in the more rural parts of the Yvelines department. This region offers larger open spaces and agricultural lands that could potentially accommodate solar farms. The gently sloping terrain in these areas would be advantageous for solar panel placement, allowing for optimal sun exposure throughout the day.
However, it's important to note that the Île-de-France region, including Le Chesnay and its surroundings, is densely populated and heavily urbanized. This factor, combined with strict land-use regulations and the presence of protected historical sites like Versailles, may limit the availability of suitable locations for large-scale solar PV projects in the immediate vicinity.
Potential areas for solar development might be found on the outskirts of nearby towns such as Plaisir, Beynes, or Thoiry, where there is a transition from suburban to more rural landscapes. These locations offer a better balance of open space and proximity to existing power infrastructure, which is crucial for connecting solar farms to the grid.
In conclusion, while the topography around Le Chesnay is generally favorable for solar energy production, the availability of suitable land for large-scale installations may be limited due to urban development and land-use restrictions. Careful site selection and engagement with local authorities would be necessary to identify and develop appropriate locations for solar PV projects in this region.
France solar PV Stats as a country
France ranks 11th in the world for cumulative solar PV capacity, with 14,718 total MW's of solar PV installed. This means that 2.80% of France's total energy as a country comes from solar PV (that's 30th in the world). Each year France is generating 218 Watts from solar PV per capita (France ranks 23rd in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in France?
Yes, there are several incentives for businesses wanting to install solar energy in France. The French government offers a range of financial incentives and tax credits to encourage businesses to invest in renewable energy sources such as solar power. These include the Feed-in Tariff (FiT), which pays businesses for the electricity they generate from their solar panels, and the Investment Tax Credit (ITC), which provides a 30% tax credit on investments made in renewable energy systems. Additionally, businesses may be eligible for grants or loans from local authorities or regional development agencies.
Do you have more up to date information than this on incentives towards solar PV projects in France? Please reach out to us and help us keep this information current. Thanks!
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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Thursday 18th of July 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.
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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.
