Latresne, France presents a moderately favorable location for year-round solar PV energy generation, though with significant seasonal variations typical of its Northern Temperate Zone position.

Seasonal Solar Performance

The solar energy output at Latresne shows strong seasonal patterns that reflect the changing sun angles and weather conditions throughout the year. Summer provides the peak performance period, delivering 6.18kWh per day for each kW of installed solar capacity. This represents the optimal time for solar generation when the sun is highest in the sky and daylight hours are longest. Spring follows as the second-best season with 5.36kWh/day per kW, making it another highly productive period for solar energy generation. The combination of improving sun angles and generally clear spring weather creates excellent conditions for PV systems. Autumn sees a notable decline to 3.21kWh/day per kW as the sun angle decreases and weather patterns shift toward the cloudier conditions typical of the region's maritime climate. Winter presents the most challenging period with only 1.76kWh/day per kW, representing less than 30% of summer production levels.

Optimal Installation Configuration

For maximum year-round energy production at Latresne, solar panels should be installed at a fixed tilt angle of 39 degrees facing south. This angle is calculated to optimize total annual output by accounting for the sun's changing position throughout the year and weighting for the varying solar irradiance levels across all seasons.

Local Environmental Challenges

Several environmental and weather factors at Latresne can significantly impact solar PV performance:

• Atlantic maritime climate influence bringing frequent cloud cover and precipitation, particularly during autumn and winter months
• Morning fog and mist common in the Garonne River valley area where Latresne is located
• High humidity levels that can contribute to soiling of panels and reduced light transmission
• Potential for salt air deposits from the nearby Atlantic Ocean affecting panel surfaces
• Deciduous vegetation in the region that may cause seasonal shading issues

Preventative Measures for Enhanced Performance

To maximize solar energy production despite these local challenges, several installation strategies should be considered: Regular cleaning schedules become particularly important due to the humid climate and potential salt air deposits. Installing panels with anti-soiling coatings can help reduce maintenance requirements and maintain optimal light transmission even in high-humidity conditions. Proper site selection and panel positioning can minimize shading from surrounding vegetation. This includes careful assessment of nearby trees and planning for their seasonal growth patterns. Installing panels high enough to clear morning fog layers, where topographically feasible, can improve early-day performance. Enhanced drainage systems around panel installations help prevent water accumulation that could lead to increased soiling or potential electrical issues in this relatively wet climate. Using mounting systems with adequate ventilation behind panels helps prevent moisture-related problems and maintains optimal operating temperatures. Implementing monitoring systems becomes especially valuable in this location to quickly identify performance drops that might result from weather-related soiling or shading issues, allowing for prompt corrective action. Despite these challenges, Latresne's location still offers reasonable solar potential, particularly during the productive spring and summer seasons when nearly 12kWh per day per kW can be expected over a six-month period.

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 Latresne

Seasonal solar PV output for Latitude: 44.7846, Longitude: -0.4824 (Latresne, 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 Latresne, France

To maximize your solar PV system's energy output in Latresne, France (Lat/Long 44.7846, -0.4824) 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 Latresne, 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 Latresne, 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	37° 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 Latresne, 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 Latresne, 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 Latresne, France

Topographical Features of Latresne

Latresne sits in the heart of the Bordeaux wine region along the right bank of the Garonne River in southwestern France. The immediate landscape around this commune is characterized by gently rolling hills and river terraces that have been shaped over millennia by the meandering Garonne. The elevation varies modestly across the area, with the town itself positioned on elevated ground that provides commanding views over the surrounding vineyards and the river valley below.

The terrain consists primarily of limestone plateaus interspersed with clay and gravel deposits left behind by ancient river systems. These geological formations create a series of subtle ridges and valleys that give the landscape its characteristic undulating appearance. The slopes are generally gentle, rarely exceeding gradients that would pose challenges for development or agricultural use.

Moving eastward from Latresne, the topography gradually transitions into the broader Bordeaux plateau, where the land becomes increasingly flat and expansive. This area represents part of the larger Aquitaine Basin, a geological depression that extends across much of southwestern France. The western approaches toward the Garonne feature more pronounced river terraces and alluvial plains that have been carved by centuries of seasonal flooding and sediment deposition.

Optimal Areas for Large-Scale Solar Development

The most promising locations for extensive solar photovoltaic installations lie to the east and southeast of Latresne, where the terrain opens up into broad, relatively flat expanses. These areas benefit from consistent southern exposure across large continuous parcels of land, minimizing the shading issues that can affect solar panel efficiency. The gentle topography in these zones reduces the need for extensive site preparation and grading, making development more economically viable.

The elevated plateaus northeast of the commune present particularly attractive opportunities, as they combine favorable orientation with good drainage and accessibility via existing road networks. These higher elevations also tend to experience fewer issues with morning fog that can occasionally affect lower-lying areas near the river. The limestone bedrock provides stable foundations for mounting systems, while the relatively sparse vegetation cover reduces clearing costs.

Areas immediately adjacent to the Garonne River valley are less suitable for large-scale solar development due to their irregular topography, higher agricultural value, and potential flooding concerns during extreme weather events. The steeper slopes found on some of the more pronounced ridges also present challenges for optimal panel positioning and maintenance access. However, the broader agricultural plains that extend eastward from these river terraces offer excellent potential, particularly where existing farming operations might benefit from agrivoltaic applications that combine solar generation with continued agricultural use.

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.