Deuil-la-Barre, France presents a moderately suitable location for solar PV energy generation, though with significant seasonal variations typical of its Northern Temperate Zone position.

Seasonal Solar Performance

The solar energy output at this location shows dramatic seasonal swings. Summer delivers the strongest performance at 5.52kWh per day per kW of installed capacity, making it an excellent time for solar generation. Spring follows as the second-best season with 4.91kWh per day per kW, offering nearly comparable output to summer months. Autumn sees a notable drop to 2.81kWh per day per kW, while winter presents the most challenging conditions with only 1.30kWh per day per kW. This winter figure represents less than a quarter of summer production, highlighting the location's strong seasonal dependency.

Optimal Panel Configuration

For maximum year-round energy production at Deuil-la-Barre, solar panels should be installed at a fixed tilt angle of 42 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's changing position throughout the year and weighting for actual solar irradiance potential.

Local Factors Affecting Solar Production

Several environmental and weather factors in the Île-de-France region around Deuil-la-Barre can impact solar panel performance:

• Urban air pollution and smog from nearby Paris can reduce solar irradiance reaching panels
• Frequent cloud cover during autumn and winter months limits direct sunlight
• Morning fog and mist common in the Seine Valley region can delay daily solar production
• Snow accumulation during winter months can completely block panels
• Dust and pollen buildup during spring and summer reduces panel efficiency

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies prove beneficial:

• Steeper panel angles (like the recommended 42 degrees) help snow slide off naturally
• Easy access design for regular cleaning to remove dust, pollen, and debris
• Quality anti-reflective coatings to maintain efficiency in diffused light conditions
• Proper ventilation spacing behind panels to prevent moisture buildup and maintain efficiency
• Strategic positioning to minimize shading from nearby buildings or vegetation

Regular maintenance becomes particularly important at this location, with cleaning recommended at least twice yearly and snow removal during winter months when safe to do so. The strong summer and spring production can help offset the weaker winter performance, making Deuil-la-Barre a reasonable choice for solar installation with proper planning and maintenance.

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 Deuil-la-Barre

Seasonal solar PV output for Latitude: 48.9778, Longitude: 2.3197 (Deuil-la-Barre, 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 Deuil-la-Barre, France

To maximize your solar PV system's energy output in Deuil-la-Barre, France (Lat/Long 48.9778, 2.3197) 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 Deuil-la-Barre, 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 Deuil-la-Barre, 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
33° 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 Deuil-la-Barre, 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 Deuil-la-Barre, 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 Deuil-la-Barre, France

Topography Around Deuil-la-Barre

Deuil-la-Barre sits in the northern suburbs of Paris within the Val-d'Oise department, positioned on the gently rolling terrain characteristic of the Île-de-France region. The landscape around this commune features relatively modest elevation changes, with the town itself perched on a plateau at approximately 80 to 100 meters above sea level. This elevated position provides natural drainage and offers pleasant views across the surrounding countryside. The topography consists primarily of gentle slopes and undulating hills that are typical of the Paris Basin's sedimentary geology. To the east and southeast, the land gradually descends toward the Seine Valley, while westward the terrain maintains its elevated character with similar plateau-like features. The area benefits from well-drained soils and a landscape that has been shaped by centuries of agricultural use and more recent suburban development. Local relief rarely exceeds 50 meters in variation, creating a landscape that appears almost flat from a distance but reveals subtle contours upon closer examination. Small valleys and dry valleys, known locally as "vallons secs," cut through the plateau, remnants of ancient water courses that once carved these shallow depressions into the limestone bedrock.

Optimal Areas for Large-Scale Solar Development

The relatively flat to gently sloping terrain around Deuil-la-Barre presents several advantages for large-scale solar photovoltaic installations. The most suitable areas lie to the southwest and west of the commune, where agricultural land on the plateau offers extensive open spaces with minimal topographical obstacles. These zones benefit from consistent elevation and gentle south-facing slopes that would optimize solar panel orientation. The plateau areas extending toward Montmorency and Soisy-sous-Montmorency provide particularly favorable conditions, with large continuous parcels of land that could accommodate substantial solar arrays. The gentle gradients in these areas, typically between 2 and 5 degrees, offer ideal conditions for ground-mounted systems while facilitating efficient drainage and maintenance access. Agricultural zones to the north and northwest also present promising opportunities, especially where the land maintains its open character away from the more densely developed suburban areas. These locations benefit from the elevated position of the plateau, which naturally provides good air circulation and reduces the likelihood of fog or mist that might affect solar panel efficiency. The open countryside extending toward the Vexin region offers the most significant potential for large-scale development, where vast agricultural plains stretch across the plateau with minimal shading from trees or buildings. These areas combine optimal topographical conditions with sufficient distance from residential zones to minimize visual impact concerns that often accompany major solar installations.

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.