Saint-Genis-Laval, 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 months deliver the strongest performance at 6.21kWh per day per kW of installed capacity, making this the prime season for solar generation. Spring follows as the second-best period with 5.31kWh per day per kW, offering excellent production levels. Autumn sees a notable decline to 3.13kWh per day per kW, while winter presents the most challenging conditions with only 1.63kWh per day per kW. This dramatic seasonal swing from summer highs to winter lows is characteristic of locations at this latitude.

Optimal Installation Configuration

For fixed panel installations at Saint-Genis-Laval, the ideal tilt angle is 39 degrees facing south to maximize total year-round solar production. This angle represents the optimal balance across all seasons based on the sun's varying elevation throughout the year.

Local Environmental Factors

Several environmental and weather factors in the Lyon metropolitan area could potentially impact solar production:

• Air pollution and urban haze from the nearby Lyon metropolitan area can reduce solar irradiance
• Frequent cloud cover and precipitation, particularly during autumn and winter months
• Potential for snow accumulation during winter periods
• Morning fog, which is common in the Rhône Valley region

Preventative Measures for Enhanced Performance

To maximize energy production despite these challenges, several installation strategies prove beneficial. Regular panel cleaning schedules help combat dust and pollution buildup that can significantly reduce efficiency. Installing panels at the proper 39-degree tilt angle not only optimizes sun exposure but also helps snow slide off more easily during winter months. Ensuring adequate spacing between panel rows prevents shading issues, particularly important during winter when the sun sits lower in the sky. Consider installing monitoring systems to quickly identify and address any performance issues caused by weather or environmental factors. Selecting high-quality panels with good low-light performance can help maintain reasonable output during the challenging autumn and winter periods when cloud cover is more frequent. Proper ventilation behind panels prevents overheating during summer months, maintaining optimal efficiency during peak production season.

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-Genis-Laval

Seasonal solar PV output for Latitude: 45.6933, Longitude: 4.7877 (Saint-Genis-Laval, 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-Genis-Laval, France

To maximize your solar PV system's energy output in Saint-Genis-Laval, France (Lat/Long 45.6933, 4.7877) 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-Genis-Laval, 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-Genis-Laval, 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-Genis-Laval, 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-Genis-Laval, 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-Genis-Laval, France

Topography Around Saint-Genis-Laval

Saint-Genis-Laval sits in the Rhône department of the Auvergne-Rhône-Alpes region, positioned on the southwestern outskirts of Lyon. The town occupies a transitional landscape between the urban sprawl of France's third-largest metropolitan area and the rolling countryside that characterizes much of the Rhône valley. The terrain here is predominantly hilly, with elevations ranging from approximately 200 to 400 meters above sea level.

The landscape is shaped by the confluence of several geographical influences. To the east lies the broad Rhône valley, while the western areas begin to show the influence of the Massif Central's foothills. This creates a varied topography of gentle slopes, rounded hills, and small valleys that drain toward the Rhône river system. The underlying geology consists primarily of sedimentary rocks and alluvial deposits, creating relatively stable ground conditions.

The immediate vicinity of Saint-Genis-Laval features a mix of urbanized areas, agricultural land, and patches of woodland. Many of the hillsides display the characteristic terraced appearance common to this part of France, where centuries of agricultural activity have modified the natural slopes. Small streams and seasonal watercourses cut through the landscape, creating minor valleys and depressions that add to the area's topographical complexity.

Optimal Areas for Large-Scale Solar Development

The rolling terrain around Saint-Genis-Laval presents both opportunities and challenges for large-scale solar photovoltaic installations. The most suitable locations would be the south-facing slopes that characterize much of the area's hillier terrain. These slopes provide natural advantages for solar installations, as they can be oriented to maximize exposure to the sun's path across the southern sky while benefiting from the natural drainage that prevents water accumulation around equipment.

The agricultural plateaus and gentle hillcrests scattered throughout the region offer particularly promising sites. These areas typically feature relatively stable, well-drained soils and are often already cleared of significant vegetation. The moderate slopes found on many of these sites would require minimal grading work while still providing good solar orientation. Areas with gradients between 5 and 15 degrees are especially well-suited, as they offer optimal panel positioning without creating excessive installation challenges.

Former agricultural land on the broader hilltops and gentle slopes would be ideal candidates for solar development. These locations often have existing access roads and electrical infrastructure nearby, reducing development costs. The relatively open nature of much of the surrounding countryside means that shading from trees or buildings is less likely to be problematic than in more densely forested or urban areas.

Areas to the west and southwest of Saint-Genis-Laval, where the terrain becomes more open and agricultural, present the most promising opportunities. Here, larger contiguous parcels of suitable land are more readily available, and the topography tends toward broader, more gently rolling hills rather than the steeper, more fragmented terrain found closer to the urban core. These western areas also benefit from being somewhat removed from the visual impact concerns that might arise closer to residential developments, while still maintaining reasonable access to existing electrical grid infrastructure.

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.