Marly, France, located at 50.3491, 3.5521 in the Northern Temperate Zone, presents a moderate location for solar PV energy generation with significant seasonal variations. This location experiences considerable fluctuation in solar energy production throughout the year, with peak performance during summer months and notably reduced output during winter.

The seasonal solar electricity production at Marly shows a clear pattern. During summer, solar panels generate an impressive 5.35kWh per day for each kW of installed capacity. Spring follows closely with 4.91kWh/day per kW installed. However, production drops significantly in autumn to 2.48kWh/day, and winter sees the lowest output at just 1.14kWh/day per kW of installed capacity.

Optimal Installation Angle

For fixed panel installations in Marly, the ideal tilt angle to maximize year-round energy production is 43 degrees facing South. This carefully calculated angle optimizes the annual solar energy harvest by balancing the seasonal variations in sun position throughout the year.

Environmental and Weather Considerations

Several factors may impact solar production at this northern French location. Marly experiences frequent cloud cover and precipitation typical of northern France, particularly during winter months when solar production is already at its minimum. The region also faces occasional fog and mist conditions that can temporarily reduce panel efficiency.

Snow accumulation during winter months presents another challenge, as even thin layers of snow can significantly reduce or completely block solar generation. Additionally, the relatively high latitude means shorter daylight hours during winter, compounding the seasonal production deficit.

Preventative Measures

To maximize energy production despite these challenges, several installation strategies can be employed:

• Install panels with self-cleaning glass or hydrophobic coatings to minimize dirt and snow accumulation
• Consider a slightly steeper tilt than the optimal 43 degrees if winter production is prioritized, as this helps shed snow more effectively
• Implement regular maintenance schedules with more frequent panel cleaning during autumn and winter
• Use high-efficiency panels specifically designed for diffuse light conditions to improve performance during cloudy days
• Consider adding a simple snow-removal system for winter months to prevent extended production losses

With these measures in place, a solar PV system in Marly can still be worthwhile, particularly if sized appropriately to account for the significant seasonal variations in production capacity.

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 Marly

Seasonal solar PV output for Latitude: 50.3491, Longitude: 3.5521 (Marly, 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 43° South in Marly, France

To maximize your solar PV system's energy output in Marly, France (Lat/Long 50.3491, 3.5521) 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 Marly, 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 Marly, France. 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
34° South in Summer	53° South in Autumn	63° South in Winter	42° 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 Marly, 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 Marly, 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 Marly, France

The topography around Marly, France, located at coordinates 50.3491° N, 3.5521° E, is characterized primarily by gently rolling plains typical of the Nord-Pas-de-Calais region. This area sits within the broader Paris Basin, a geological formation that covers much of northern France with relatively flat to moderately undulating terrain. Marly itself is situated in the Scarpe-Escaut valley, with an average elevation of approximately 30-40 meters above sea level. The landscape features subtle variations in elevation rather than dramatic relief. The nearby Scarpe and Escaut rivers have shaped this landscape over millennia, creating a network of small valleys and modest ridges throughout the region.

Local Terrain Features

The immediate surroundings of Marly consist of open agricultural fields interspersed with small wooded areas and urban developments. The terrain gradually rises toward the south and southeast, while remaining relatively level toward the north and northwest. This gentle topography is a result of the region's geological history, with sedimentary deposits creating the characteristic flat plains of northern France. Water features are notable in this landscape, with the Scarpe River flowing nearby and several smaller streams and canals crisscrossing the area. These waterways have historically influenced settlement patterns and land use in the region.

Optimal Areas for Solar PV Development

For large-scale solar photovoltaic installations, the most suitable areas near Marly would be the open agricultural plains to the south and southeast of the town. These locations offer several advantages for solar development: First, these areas feature relatively flat terrain with minimal shading obstacles, allowing for efficient arrangement of solar panels without requiring extensive earthworks. The gently sloping aspects facing south provide naturally advantageous orientation for solar collection in the Northern Hemisphere. Second, the agricultural plains have already been cleared of forest cover, reducing environmental impact and land conversion costs compared to wooded areas. Many of these fields are accessible via existing road infrastructure, simplifying construction and maintenance logistics. Third, the slightly elevated positions of some of these areas reduce the risk of flooding, which is an important consideration given the presence of rivers and the relatively low elevation of the region as a whole. The areas to avoid would include the immediate river valleys and any designated wetlands, which may have higher ecological sensitivity and potential flooding concerns. Similarly, the more densely populated urban zones around Valenciennes to the south would present challenges related to land availability and potential shading from buildings. In conclusion, the modest relief and open character of the landscape surrounding Marly create generally favorable conditions for solar development, with the agricultural plains to the south and southeast representing the most promising locations for large-scale 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!

Citation Guide

Article Details for Citation

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.