Libourne, France, located at 44.9141, -0.2346, offers a moderate setting for solar PV energy generation throughout the year. This location in southwestern France experiences varying solar energy potential across the different seasons.

Seasonal Solar Production

Solar energy production in Libourne follows a predictable seasonal pattern. Summer months yield the highest output at 6.18kWh per day for each kilowatt installed, making it an excellent time for solar generation. Spring follows as the second most productive season with 5.36kWh/day per kW installed.

Production decreases considerably during autumn, generating 3.21kWh/day per kW installed. Winter shows the most significant drop, with only 1.74kWh/day per kW installed, less than a third of summer production.

Optimal Panel Installation

For fixed solar panel installations in Libourne, the ideal tilt angle is 39 degrees facing South. This specific angle maximizes year-round energy production by optimizing exposure to the sun's path throughout the seasons.

Environmental and Weather Considerations

Several factors could affect solar production in Libourne. The region experiences moderate rainfall, particularly during autumn and winter, which can temporarily reduce solar output. Morning fog from the nearby Dordogne River might delay peak production during certain months.

Libourne's proximity to the Atlantic means occasional maritime weather patterns, bringing cloud cover that can interrupt otherwise sunny conditions. Additionally, the area can experience dust and pollen during spring and summer that may accumulate on panels.

Preventative Measures

To maximize solar production in Libourne, consider these practical steps:

• Install self-cleaning panels or implement a regular cleaning schedule, especially during spring pollen season and after dry, dusty periods
• Use micro-inverters or power optimizers to minimize production losses from partial shading
• Consider a slight adjustment to the standard 39-degree tilt if your property receives predictable shading at certain times
• Install a weather monitoring system to track performance against expected output
• Ensure adequate panel spacing for proper ventilation, as panel efficiency decreases with higher temperatures

Overall, while Libourne isn't ideal for year-round solar production due to its significant winter decrease, it still offers favorable conditions for approximately seven months of the year, making solar PV a viable renewable energy option for this location.

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 Libourne

Seasonal solar PV output for Latitude: 44.9141, Longitude: -0.2346 (Libourne, 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 Libourne, France

To maximize your solar PV system's energy output in Libourne, France (Lat/Long 44.9141, -0.2346) 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 Libourne, 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 Libourne, 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	60° 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 Libourne, 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 Libourne, 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 Libourne, France

Libourne is situated in southwestern France in the Gironde department, nestled within the Dordogne and Isle river valleys. The topography around Libourne is characterized by gentle rolling hills and flat river plains, creating a diverse landscape that transitions between the floodplains of the converging rivers and the more elevated vineyard-covered slopes. The immediate area surrounding Libourne features relatively flat terrain along the river valleys, with elevations generally ranging from 5 to 30 meters above sea level. This flat alluvial plain gradually gives way to more undulating terrain as one moves away from the rivers, particularly to the east and northeast.

Surrounding Landscape Features

To the west of Libourne lies the flat Libournais plain that extends toward Bordeaux and the Atlantic coast. This area is predominantly covered with vineyards of the famous Saint-Émilion and Pomerol wine regions, with gentle slopes that provide excellent drainage for viticulture. The northern and eastern regions become more varied in elevation, with a series of hills and small valleys forming part of the transition zone toward the Périgord region. These hills rarely exceed 100 meters in height but create distinctive undulations in the landscape. To the south, across the Dordogne River, the terrain gradually rises toward the Entre-Deux-Mers region, known for its more pronounced hills and valleys between the Dordogne and Garonne rivers.

Areas Suitable for Solar PV Development

For large-scale solar PV installations, several areas around Libourne present favorable conditions based on topographical considerations: The flatter agricultural plains to the west and northwest of Libourne offer substantial contiguous land areas with minimal shading concerns. These areas benefit from good solar exposure due to their open character and lack of significant topographical barriers. Some of the gently sloping hillsides facing south and southwest in the surrounding countryside would be particularly advantageous for solar collection efficiency. Areas between Libourne and Saint-Émilion that aren't dedicated to high-value vineyards could provide suitable terrain with favorable orientation. The slightly elevated plateaus northeast of Libourne, which feature less prestigious agricultural use than the prime vineyard areas, combine good solar exposure with reasonable land availability. These areas typically have sufficient elevation to avoid morning fog that sometimes forms in the river valleys. It's worth noting that while the topography is generally favorable for solar development, the region's strong agricultural heritage, particularly its world-renowned vineyards, presents significant land-use competition. The most practical areas for large-scale solar development would likely be found on marginal agricultural lands or brownfield sites rather than prime viticultural areas. The relatively modest relief of the terrain throughout the region means that engineering challenges related to slope stability or extensive grading would be minimal for solar installations in most locations around Libourne.

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.