Tours, France, located at latitude 47.3983 and longitude 0.7037, offers a varied potential for solar energy generation throughout the year. This location in the Northern Temperate Zone experiences significant seasonal fluctuations in solar output, which impacts the efficiency of photovoltaic (PV) systems.

Seasonal Solar Production

Solar energy production in Tours peaks during the summer months, with an average daily output of 5.77 kWh per kW of installed solar capacity. Spring follows closely behind, generating 5.20 kWh/day. However, there's a substantial drop in production during autumn (3.03 kWh/day) and winter (1.45 kWh/day).

The most ideal time for solar energy generation in Tours is from late spring through early autumn. During this period, longer daylight hours and higher sun angles contribute to increased solar panel efficiency. Conversely, the winter months present challenges due to shorter days and lower sun angles, resulting in significantly reduced energy production.

Optimal Panel Installation

To maximize year-round solar energy production in Tours, fixed solar panels should be installed at a tilt angle of 41 degrees facing south. This angle optimizes the panels' exposure to sunlight throughout the year, balancing the varying sun angles across seasons.

Environmental Factors and Mitigation

While Tours doesn't face extreme environmental challenges for solar production, there are some factors to consider:

• Cloud cover: The region experiences cloudy conditions, particularly in autumn and winter, which can reduce solar output. Using high-efficiency panels and microinverters can help mitigate the impact of partial shading.
• Snow: Occasional snowfall in winter might temporarily cover panels. Installing panels at the optimal angle helps snow slide off more easily, and some systems include snow sensors to alert owners when manual clearing is necessary.

Additionally, regular cleaning and maintenance of solar panels can help ensure optimal performance, especially during seasons with lower natural solar irradiance. Implementing a monitoring system can also help quickly identify and address any issues affecting energy production.

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 Tours

Seasonal solar PV output for Latitude: 47.3983, Longitude: 0.7037 (Tours, 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 41° South in Tours, France

To maximize your solar PV system's energy output in Tours, France (Lat/Long 47.3983, 0.7037) throughout the year, you should tilt your panels at an angle of 41° 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 Tours, 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 Tours, France. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 41° 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	51° 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 Tours, 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 Tours, 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 Tours, France

Tours, France, situated at 47.3983°N latitude and 0.7037°E longitude, is nestled in the heart of the Loire Valley, a region known for its gentle, rolling landscape. The city itself is built on relatively flat terrain, with the Loire River flowing through its southern edge. The surrounding area is characterized by a mix of low hills, fertile plains, and river valleys. To the north and south of Tours, the land gradually rises into gentle hills, creating a subtle undulating pattern across the countryside. These hills are typically covered with a patchwork of agricultural fields, vineyards, and small forests. The Loire Valley is famous for its picturesque landscapes, dotted with historic châteaux and quaint villages.

Topographical Features

The Loire River is the dominant topographical feature in the region. It meanders through a wide, flat floodplain, which has been extensively cultivated over centuries. This floodplain provides rich alluvial soil, making it ideal for agriculture. Several smaller rivers and streams, such as the Cher and the Indre, join the Loire near Tours, creating a network of waterways that have shaped the local landscape. To the east and west of Tours, the terrain remains relatively flat, with occasional low hills breaking up the horizon. These areas are primarily used for agriculture, with fields of wheat, sunflowers, and other crops stretching as far as the eye can see.

Potential for Solar PV

When considering areas near Tours that would be most suited to large-scale solar PV installations, several factors come into play. The ideal locations would be relatively flat, receive ample sunlight, and have minimal environmental or cultural constraints. The agricultural plains to the north and east of Tours present promising opportunities for solar development. These areas offer large, open spaces with few obstructions to sunlight. The gently rolling terrain in these regions could potentially accommodate expansive solar arrays without significant earthworks. South of Tours, where the land rises slightly, there may be south-facing slopes that could be particularly well-suited for solar panels. These inclined surfaces can potentially capture more sunlight throughout the day, increasing the efficiency of solar installations. However, it's important to note that the Loire Valley is a UNESCO World Heritage site, known for its cultural landscape and historic châteaux. Any large-scale solar development would need to be carefully planned to minimize visual impact and preserve the region's cultural and natural heritage. Areas to avoid for solar PV installations would include the floodplains of the Loire and its tributaries, as well as any protected forests or nature reserves. Additionally, the immediate surroundings of historic sites and châteaux would likely be unsuitable due to cultural preservation concerns. In conclusion, while the topography around Tours offers potential for solar PV development, particularly in the agricultural plains and on south-facing slopes, any such projects would need to be balanced with the region's rich cultural and natural heritage.

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.