Saint-Martin-la-Plaine, France presents a moderately favorable location for year-round solar photovoltaic energy generation, though with significant seasonal variations typical of its Northern Temperate Zone position.

Seasonal Solar Performance

The location experiences substantial differences in solar energy production throughout the year. Summer provides the strongest performance at 6.21 kWh per day per kW of installed capacity, making it the prime season for solar generation. Spring follows as the second-best period with 5.31 kWh per day per kW, offering excellent energy production as daylight hours increase and weather conditions improve. Autumn sees a notable decline to 3.13 kWh per day per kW as the region transitions toward winter conditions. Winter presents the most challenging period for solar generation, producing only 1.63 kWh per day per kW of installed capacity - less than half of the autumn output and roughly a quarter of summer production.

Optimal Installation Configuration

For maximum year-round energy production at Saint-Martin-la-Plaine, solar panels should be installed at a fixed tilt angle of 39 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's varying elevation throughout the year and weighting for actual solar irradiance conditions at this specific latitude.

Local Factors Affecting Solar Production

Several environmental and weather factors in this region can significantly impact solar energy generation:

• Winter weather conditions: The dramatic drop in winter production suggests frequent cloud cover, shorter days, and potential snow accumulation
• Regional climate patterns: The temperate continental climate brings variable weather that can cause inconsistent energy output
• Atmospheric conditions: Seasonal fog and humidity typical of the Loire region may reduce solar irradiance

Preventative Measures for Enhanced Performance

To maximize solar energy production despite these challenges, several installation strategies should be considered:

• Snow management: Install panels at the recommended 39-degree angle to promote natural snow shedding, and ensure adequate spacing between panel rows
• Maintenance access: Design systems with safe access points for cleaning panels during periods of reduced natural cleaning from precipitation
• System sizing: Account for the 4:1 ratio between summer and winter production when calculating system capacity and battery storage requirements
• Quality components: Use panels and inverters rated for the temperature variations experienced in this temperate climate
• Monitoring systems: Install performance monitoring to quickly identify and address any weather-related efficiency losses

While Saint-Martin-la-Plaine is not among the most ideal solar locations due to its significant seasonal variations, proper system design and installation practices can help maximize the substantial energy production available during the favorable spring and summer months while maintaining reasonable performance during the more challenging autumn and winter periods.

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 Saint-Martin-la-Plaine

Seasonal solar PV output for Latitude: 45.5511, Longitude: 4.5926 (Saint-Martin-la-Plaine, 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 Saint-Martin-la-Plaine, France

To maximize your solar PV system's energy output in Saint-Martin-la-Plaine, France (Lat/Long 45.5511, 4.5926) 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 Saint-Martin-la-Plaine, 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 Saint-Martin-la-Plaine, 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 Saint-Martin-la-Plaine, 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 Saint-Martin-la-Plaine, 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 Saint-Martin-la-Plaine, France

Topography Around Saint-Martin-la-Plaine

Saint-Martin-la-Plaine sits in the Loire department of the Auvergne-Rhône-Alpes region, nestled within the foothills of the Massif Central mountain range. The terrain around this small French commune is characterized by rolling hills and gentle valleys, with elevations gradually rising from the Loire River valley toward the western highlands. The landscape features a mix of agricultural fields, scattered woodlands, and small settlements typical of this transitional zone between the Rhône valley and the central French mountains. The immediate vicinity displays moderate topographical variation, with slopes that are generally manageable rather than steep. Ancient volcanic activity in the broader Massif Central region has created a foundation of crystalline rocks and volcanic deposits, resulting in well-drained soils across much of the area. Small streams and tributaries flow eastward toward the Loire River, creating shallow valleys and gentle ridgelines that define the local geography. The elevation around Saint-Martin-la-Plaine ranges from approximately 350 meters near the Loire valley floor to over 600 meters on the higher ridges to the west. This creates a gently undulating landscape with sufficient variation to provide interesting topographical features while remaining relatively accessible for development and land use.

Optimal Areas for Large-Scale Solar Development

The most suitable locations for large-scale solar photovoltaic installations in this region would be the south-facing slopes of the gentle hills that characterize the area. These locations benefit from optimal solar exposure throughout the day while remaining on terrain that is not excessively steep for construction and maintenance activities. The moderate slopes provide natural drainage and reduce the risk of water accumulation around solar equipment. Agricultural plateaus and cleared upland areas present excellent opportunities for solar development, particularly those with minimal tree cover and consistent southern exposure. The relatively open landscape means that shading from surrounding topographical features is less of a concern compared to more mountainous regions. Fields that are currently used for crops or pasture, especially those on slightly elevated positions, would be prime candidates for solar installations. The eastern-facing slopes closer to the Loire valley, while at lower elevations, also offer good potential due to their gentler gradients and proximity to existing electrical infrastructure. These areas tend to have good access roads and are less remote than the higher elevations, making construction and ongoing maintenance more practical and cost-effective. Areas to avoid would include the steeper western slopes that face away from optimal solar angles, heavily forested sections where clearing would be environmentally problematic, and low-lying areas near streams where flooding or excessive moisture could pose risks to equipment. The narrow valley bottoms, while flat, may experience more frequent fog and reduced solar access due to surrounding topography.

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.