La Montagne, Pays de la Loire, France, located in the Northern Temperate Zone at coordinates 47.1878, -1.686, presents a moderately suitable location for year-round solar PV energy generation, though with significant seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Performance

The location experiences substantial fluctuations in solar energy production throughout the year. Summer delivers the highest output at 5.67 kWh per day per kW of installed solar capacity, making it the peak season for energy generation. Spring follows closely with 5.33 kWh per day per kW, representing nearly equivalent performance to summer months. Autumn shows a notable decline to 3.07 kWh per day per kW, while winter presents the most challenging period with only 1.43 kWh per day per kW. This dramatic seasonal variation means that winter production is less than 25% of summer output, which significantly impacts the year-round viability of solar installations.

Optimal Installation Configuration

For fixed panel installations at La Montagne, Pays de la Loire, the ideal tilt angle to maximize total year-round solar production is 40 degrees facing south. This angle has been calculated by analyzing daily solar elevation angles at this latitude, determining optimal panel positioning, and weighting these angles according to daily photovoltaic potential using solar irradiance data.

Local Environmental and Weather Challenges

Several significant environmental and weather factors could impede solar production at this French location. The coastal proximity of La Montagne, Pays de la Loire, being near the Atlantic Ocean, creates specific challenges that solar installers must address.

• Salt air corrosion from marine environments can degrade solar panel frames, mounting systems, and electrical connections over time
• Higher humidity levels near coastal areas can reduce solar panel efficiency and promote moisture-related electrical issues
• Atlantic weather systems bring frequent cloud cover and precipitation, particularly during autumn and winter months
• Strong coastal winds can stress mounting systems and potentially damage panels if not properly secured

Preventative Installation Measures

To maximize energy production despite these environmental challenges, several preventative measures should be implemented during solar installation. Using marine-grade aluminum frames and stainless steel mounting hardware will resist salt corrosion effectively. Installing panels with enhanced drainage systems and proper ventilation gaps beneath panels helps combat humidity issues while maintaining optimal operating temperatures. Regular cleaning schedules become particularly important in coastal locations to remove salt deposits and maintain panel efficiency. Wind-resistant mounting systems rated for coastal conditions should be specified, with additional structural reinforcement if necessary. Electrical components should feature enhanced weatherproofing and corrosion-resistant materials suitable for marine environments.

Overall Assessment

While La Montagne offers reasonable solar potential during spring and summer months, the location's coastal challenges and significant winter production decline make it a moderately suitable rather than ideal location for solar PV installations. Proper planning and installation techniques can help overcome environmental obstacles and optimize year-round energy generation.

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 La Montagne

Seasonal solar PV output for Latitude: 47.1878, Longitude: -1.686 (La Montagne, 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 40° South in La Montagne, France

To maximize your solar PV system's energy output in La Montagne, France (Lat/Long 47.1878, -1.686) throughout the year, you should tilt your panels at an angle of 40° 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 La Montagne, 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 La Montagne, France. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 40° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
31° South in Summer	50° South in Autumn	61° South in Winter	40° 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 La Montagne, 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 La Montagne, 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 La Montagne, France

Topographical Features of La Montagne Region

La Montagne is situated in the Loire-Atlantique department of western France, positioned within the greater Nantes metropolitan area. The landscape around this location is characterized by gently rolling terrain typical of the Loire Valley region, with relatively modest elevation changes that create a mixed topography of low hills, shallow valleys, and flat agricultural plains. The area sits at a moderate elevation above sea level, forming part of the broader Armorican Massif geological formation. This ancient geological structure has been weathered over millions of years, resulting in the smooth, undulating countryside visible today. The terrain features gradual slopes rather than steep inclines, with the highest points in the immediate vicinity rising only modestly above the surrounding landscape. Local topography includes a patchwork of agricultural fields, scattered woodlands, and small settlements connected by country roads. The land use pattern reflects centuries of farming activity, with field boundaries often marked by hedgerows and stone walls that follow the natural contours of the terrain. Small streams and drainage channels wind through the lower-lying areas, creating narrow valley systems that add subtle variation to the otherwise gentle landscape.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for extensive solar photovoltaic installations would be found on the broader plateau areas and gentle south-facing slopes that characterize much of the surrounding countryside. These elevated flat areas and mild inclines offer several advantages for solar development, including consistent exposure to sunlight throughout the day and minimal shading from surrounding terrain features. Agricultural land on the flatter portions of the landscape presents particularly promising opportunities for solar farms, especially areas that may be less productive for traditional farming or where land use could be adapted to accommodate dual agricultural and energy production purposes. The open nature of much of the surrounding countryside means that large installations could be developed without significant obstruction from existing structures or natural barriers. Areas to the south and southeast of La Montagne would be especially well-suited for solar development due to their favorable orientation and the relatively unobstructed nature of the terrain. These locations benefit from optimal positioning to capture maximum solar radiation while maintaining the gentle topography that makes construction and maintenance of large solar arrays more economically viable. The existing agricultural infrastructure in the region, including access roads and proximity to electrical transmission networks serving the Nantes metropolitan area, would support the development of significant solar installations. The combination of suitable topography, existing infrastructure, and proximity to population centers requiring electrical power makes this region particularly attractive for renewable energy development.

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.