Vauhallan, France, situated at coordinates 48.7327, 2.1974 in the Northern Temperate Zone, offers varying potential for solar energy generation throughout the year. This location experiences significant seasonal fluctuations in solar electricity production that are worth understanding before installing solar panels.

Seasonal Solar Production

Solar panels in Vauhallan produce their highest output during summer, generating approximately 5.51 kWh per day for each kilowatt of installed capacity. Spring follows closely with 4.91 kWh/day per kW, making these the two most productive seasons. Autumn sees a substantial decrease to 2.82 kWh/day per kW, while winter production drops dramatically to just 1.29 kWh/day per kW of installed capacity.

This pattern creates a nearly 4.3-fold difference between the best and worst seasons, with summer producing more than four times the electricity of winter. The strong performance in both spring and summer means that approximately 70% of annual solar energy would likely be generated during these six months.

Optimal Panel Installation

For fixed solar panel installations in Vauhallan, the ideal tilt angle to maximize year-round electricity production is 42 degrees facing South. This angle optimizes the capture of solar radiation throughout the year, accounting for the sun's changing position across seasons.

Environmental and Weather Considerations

Several factors could potentially impact solar production at this location:

• Winter cloud cover is significant in this region of France, contributing to the low winter production figures and requiring system sizing that accounts for these months if year-round reliability is needed.
• Morning fog can be common in the Paris basin area, potentially delaying peak production until later in the day, especially during autumn and winter.
• Occasional snowfall in winter may temporarily cover panels, though this is typically not persistent enough to significantly impact annual production.

To mitigate these challenges, installing panels at the recommended 42-degree angle helps shed snow more easily than flatter installations. Additionally, including a monitoring system can alert owners to unexpected production drops, while periodic cleaning (especially after pollen season in spring) can maintain optimal performance.

Overall, Vauhallan represents a moderately good location for solar energy production, with excellent potential during the warmer months but requiring careful system sizing to accommodate the significant winter production drop.

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 Vauhallan

Seasonal solar PV output for Latitude: 48.7327, Longitude: 2.1974 (Vauhallan, 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 Vauhallan, France

To maximize your solar PV system's energy output in Vauhallan, France (Lat/Long 48.7327, 2.1974) 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 Vauhallan, 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 Vauhallan, 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 Vauhallan, 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 Vauhallan, France.

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 Vauhallan, France

The surroundings of Vauhallan, France, present a varied topography characteristic of the Île-de-France region. Situated approximately 20 kilometers southwest of Paris, Vauhallan lies within a gently undulating landscape where the Plateau de Saclay transitions toward the Bièvre Valley. The terrain features modest elevation changes, with rolling hills and shallow valleys forming the predominant landscape features. The elevation in this area typically ranges between 140-160 meters above sea level, with gradual slopes rather than steep inclines. Vauhallan itself sits in a slightly protected position, with higher ground to the south and west. The local area includes some wooded sections, particularly in the valleys and along watercourses, while the higher plateau areas have historically been used for agriculture. Small streams and drainage channels cross the landscape, eventually feeding into the Bièvre River system.

Solar PV Potential Areas

For large-scale solar photovoltaic installations, several nearby areas present favorable conditions based on topographical considerations. The Plateau de Saclay, extending to the south and west of Vauhallan, offers the most promising terrain for solar development. This elevated plateau provides relatively flat expanses with minimal shadowing from terrain features, creating optimal conditions for solar array placement. The gently sloping south-facing hillsides found throughout the region would also be advantageous for solar collection, as they naturally orient toward the sun's path. These areas maximize solar exposure throughout the day while requiring minimal site preparation due to their modest inclines. Agricultural lands surrounding Vauhallan, particularly those on the plateau, represent another potential option. These areas already feature cleared land with established access routes and minimal natural obstacles. However, consideration must be given to balancing renewable energy development with agricultural preservation. The topography generally becomes less suitable for large installations in the more pronounced valleys and densely wooded areas, where shadowing effects would reduce efficiency. Similarly, the more developed urban and suburban zones closer to Paris present space constraints despite favorable terrain. Any significant solar development would need to consider not just the physical landscape but also the cultural and historical significance of this area, which includes protected natural spaces and heritage sites that contribute to the region's distinctive character.

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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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.