Solar PV Analysis of Guyancourt, France
Guyancourt, France, situated in the Northern Temperate Zone, presents a mixed picture for solar energy generation throughout the year. This location experiences significant seasonal variations in solar output, which impacts the overall efficiency of photovoltaic (PV) systems.
Seasonal Solar Performance
Summer stands out as the most productive season, with an impressive daily output of 5.56 kWh per kW of installed solar capacity. Spring follows closely behind, generating 4.97 kWh/day. However, the performance drops considerably during autumn, with 2.89 kWh/day, and reaches its lowest point in winter, producing only 1.34 kWh/day.
These figures highlight the stark contrast between the warmer and colder months, with summer producing more than four times the energy of winter. This variation is primarily due to the changing angle of the sun and the number of daylight hours throughout the year.
Optimal Panel Installation
To maximize year-round energy production, fixed solar panels in Guyancourt should be tilted at a 42-degree angle facing south. This angle is calculated to capture the most sunlight across all seasons, considering the location's latitude and the sun's changing position throughout the year.
Environmental and Weather Factors
While Guyancourt's climate is generally favorable for solar energy, there are some factors that could potentially impact production:
- Cloud cover: The region experiences frequent cloudy days, especially in autumn and winter, which can reduce solar efficiency.
- Precipitation: Rain and occasional snow can temporarily decrease panel output and require cleaning.
To mitigate these issues, installers can implement several preventative measures:
- Use high-efficiency panels designed to perform well in diffuse light conditions.
- Install a robust cleaning system or schedule regular maintenance to remove debris and snow.
- Consider incorporating micro-inverters or power optimizers to minimize the impact of partial shading.
In conclusion, while Guyancourt's location presents challenges, particularly during the winter months, it still offers substantial potential for solar energy generation. With proper installation techniques and maintenance, a solar PV system can provide significant energy output, especially during the spring and summer 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 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 Guyancourt
Seasonal solar PV output for Latitude: 48.7726, Longitude: 2.0727 (Guyancourt, 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 Guyancourt, France
To maximize your solar PV system's energy output in Guyancourt, France (Lat/Long 48.7726, 2.0727) 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 Guyancourt, 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 Guyancourt, 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 Guyancourt, 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 Guyancourt, 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 Guyancourt, France
The topography around Guyancourt, France, is generally characterized by gently rolling hills and relatively flat terrain. This area is part of the Île-de-France region, which is known for its mild landscape features. Guyancourt itself is situated on a plateau, with subtle elevation changes throughout the surrounding area.
To the north and east of Guyancourt, the land gradually slopes down towards the Seine River valley. This creates a series of low hills and shallow valleys, with the terrain becoming slightly more undulating as you move away from the town. To the south and west, the landscape remains fairly level, with occasional small hills and depressions.
The area around Guyancourt is a mix of urban development, suburban neighborhoods, and pockets of agricultural land. There are also several forested areas and parks scattered throughout the region, which add some variety to the topography.
Areas Suitable for Large-Scale Solar PV
When considering locations for large-scale solar photovoltaic (PV) installations near Guyancourt, several factors come into play. The most suitable areas would typically have the following characteristics:
- Open, flat terrain with minimal shading from trees or buildings
- Good sun exposure throughout the day
- Proximity to existing electrical infrastructure
- Minimal environmental or cultural impact
Based on these criteria, the most promising areas for large-scale solar PV installations near Guyancourt would likely be:
1. Agricultural lands to the south and southwest of Guyancourt: These areas offer large, open spaces with relatively flat terrain, making them ideal for solar panel arrays. The land is already being used for human purposes, which may reduce potential conflicts with natural habitats.
2. Former industrial sites or brownfields in the broader region: While not necessarily in the immediate vicinity of Guyancourt, repurposing such areas for solar energy production could be an environmentally friendly option.
3. Portions of the Plateau de Saclay: This elevated area to the south of Guyancourt has some open spaces that could potentially accommodate solar installations, although careful planning would be needed to balance energy production with the area's agricultural and research activities.
It's important to note that any large-scale solar PV project would require detailed site assessments, environmental impact studies, and compliance with local regulations before implementation. The suitability of specific locations would need to be verified through on-site surveys and consultations with local authorities and stakeholders.
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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Sunday 28th of July 2024
Last Updated: Monday 21st of July 2025
Tell Us About Your Work
We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.
Feeling generous?
Share this with your friends!
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.
