Modane, France, located in the Northern Temperate Zone at coordinates 45.1999°N, 6.6676°E, presents a mixed picture for year-round solar energy generation. The location shows significant seasonal variation in solar output, which is typical for its mountainous Alpine setting.

Seasonal Solar Performance

The solar energy production at Modane varies dramatically throughout the year. Summer delivers the highest output at 6.32 kWh per day per kW of installed solar capacity, making it the most productive season. Spring follows as the second-best performing season with 4.95 kWh per day per kW, while autumn drops to 3.18 kWh per day per kW. Winter presents the greatest challenge, producing only 1.89 kWh per day per kW of installed capacity. For optimal year-round performance, fixed solar panels at this location should be tilted at 39 degrees facing south. This angle maximizes total annual energy production by accounting for the sun's varying position throughout the seasons and the location's specific latitude.

Environmental and Weather Challenges

Modane's location in the French Alps presents several significant factors that can impede solar production. Snow accumulation during winter months is a primary concern, as it can completely block solar panels and dramatically reduce energy generation during an already low-production season. The mountainous terrain can also create shadowing effects, particularly during winter when the sun travels lower across the sky. High altitude conditions bring increased UV exposure, which can accelerate panel degradation over time. Additionally, the Alpine climate features frequent temperature fluctuations and potential for severe weather events including hailstorms, which can damage solar installations.

Preventative Measures for Enhanced Performance

Several installation strategies can help maximize solar energy production at this location:

• Install panels with adequate tilt (the recommended 39 degrees) to encourage natural snow shedding
• Use mounting systems that allow for safe manual snow removal when necessary
• Position panels away from potential shading sources like nearby mountains, trees, or buildings
• Select panels rated for extreme temperature variations and high-altitude conditions
• Install protective measures against hail damage, such as tempered glass panels or protective screens

Regular maintenance becomes particularly important in this environment. Periodic cleaning and inspection help ensure panels remain free of snow, debris, and any weather-related damage that could reduce efficiency. The significant seasonal variation means that energy storage or grid-tie systems become especially valuable for maintaining consistent power availability throughout 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 Modane

Seasonal solar PV output for Latitude: 45.1999, Longitude: 6.6676 (Modane, 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 39° South in Modane, France

To maximize your solar PV system's energy output in Modane, France (Lat/Long 45.1999, 6.6676) throughout the year, you should tilt your panels at an angle of 39° 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 Modane, 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 Modane, France. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 39° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
29° South in Summer	49° South in Autumn	59° South in Winter	38° 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 Modane, 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 Modane, 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 Modane, France

Topographical Features of the Modane Region

Modane sits in the heart of the French Alps at an elevation of approximately 1,050 meters above sea level, nestled within the Maurienne Valley in the Savoie department. This strategic location places the town in a dramatic mountainous landscape characterized by steep-sided valleys, towering peaks, and complex terrain that has been carved by glacial and fluvial processes over millennia.

The surrounding topography is dominated by the Vanoise Massif to the north and the Cerces Massif to the south, with several peaks exceeding 3,000 meters in elevation. The Arc River flows through the valley floor, creating a relatively narrow corridor of flatter terrain that runs roughly east to west. The valley walls rise steeply on both sides, creating a distinctive U-shaped profile typical of glacially-carved Alpine valleys.

The terrain immediately around Modane features significant elevation changes within short distances. South-facing slopes receive the most direct sunlight throughout the day, while north-facing slopes remain in shadow for extended periods, particularly during winter months. The valley orientation and surrounding mountain barriers create distinct microclimatic conditions that vary considerably depending on aspect, elevation, and local topographical features.

Slope Characteristics and Land Use Patterns

The mountainous terrain around Modane presents a complex mosaic of slope angles and orientations. Many areas feature gradients that exceed 30 degrees, making them unsuitable for large-scale development projects. However, certain locations offer more moderate slopes, particularly on some of the lower elevation terraces and alluvial fans that have formed where tributary valleys meet the main Arc Valley.

Traditional land use in the region includes alpine pastures, forested areas dominated by coniferous species, and some agricultural activities on the more accessible slopes. The tree line typically occurs around 2,000 meters elevation, above which alpine meadows and bare rock dominate the landscape. Below the tree line, dense forest coverage can significantly impact solar irradiance levels at ground level.

Optimal Areas for Large-Scale Solar Development

The most promising locations for large-scale solar photovoltaic installations in the Modane area would be found on south and southwest-facing slopes with moderate gradients between 1,100 and 1,800 meters elevation. These areas benefit from optimal solar exposure while remaining accessible for construction and maintenance activities.

The lower elevation terraces along the Arc Valley, particularly those on the southern side of the valley, present some of the best opportunities. These locations typically feature gentler slopes that have been modified by past glacial and alluvial processes, creating more stable foundation conditions for solar installations. Areas that have been previously cleared for agriculture or grazing would be particularly suitable, as they already lack forest coverage that could create shading issues.

Higher elevation sites above the tree line could also prove viable, particularly on the more accessible ridges and plateau areas. These locations benefit from reduced atmospheric interference and clearer skies, though they would face challenges related to snow coverage during winter months and more extreme weather conditions. The logistics of construction and maintenance at these elevations would also be more complex and costly.

Areas to avoid would include steep north-facing slopes, narrow valley bottoms that experience prolonged shadowing from surrounding peaks, and locations prone to avalanche activity or other geological hazards. The complex topography means that detailed site-specific analysis would be essential to identify the precise locations offering the best combination of solar exposure, accessibility, and environmental suitability for any large-scale solar development project in this Alpine 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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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.