Voiron, France, situated at latitude 45.3615 and longitude 5.5915, presents a varied landscape for solar energy production throughout the year. This location in the Northern Temperate Zone experiences significant seasonal fluctuations in solar energy potential, which directly impacts the effectiveness of solar photovoltaic (PV) systems.

Seasonal Solar Performance

The solar energy output at Voiron varies considerably across the four meteorological seasons. Summer stands out as the most productive period, with an impressive 6.24 kWh per day for each kilowatt of installed solar capacity. Spring follows closely, generating 5.37 kWh/day. Autumn sees a notable decrease to 3.17 kWh/day, while winter experiences the lowest output at 1.68 kWh/day.

These figures highlight the stark contrast between the peak and trough of solar production in Voiron. The long, sunny days of summer provide ideal conditions for solar energy generation, while the short, often overcast days of winter present significant challenges.

Optimal Panel Installation

To maximize year-round solar energy production in Voiron, fixed solar panels should be installed at a tilt angle of 39 degrees facing south. This angle has been calculated to optimize the panels' exposure to sunlight throughout the year, taking into account the Earth's elliptical orbit and the location's specific latitude.

Environmental and Weather Considerations

Voiron's climate and geographical location present some challenges for solar energy production. The region experiences relatively high rainfall, particularly in the autumn months, which can reduce solar efficiency. Additionally, the area is prone to occasional fog and mist, especially in the cooler months, which can further impede solar generation.

To mitigate these issues, several preventative measures can be taken during solar installation:

• Use high-quality, weather-resistant solar panels that perform well in low-light conditions.
• Install a robust cleaning system to remove dust, leaves, and other debris that may accumulate on the panels, particularly after rainy or foggy periods.

Despite these challenges, Voiron's location still offers substantial potential for solar energy production, especially during the spring and summer months. With proper installation and maintenance, a solar PV system in this area can provide a significant contribution to renewable energy generation throughout the year.

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 Voiron

Seasonal solar PV output for Latitude: 45.3615, Longitude: 5.5915 (Voiron, 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 Voiron, France

To maximize your solar PV system's energy output in Voiron, France (Lat/Long 45.3615, 5.5915) 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 Voiron, 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 Voiron, 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 Voiron, 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 Voiron, 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 Voiron, France

Voiron, a charming town in southeastern France, is nestled within a diverse and picturesque landscape. The topography surrounding Voiron is characterized by a mix of rolling hills, valleys, and plateaus, creating a varied and visually appealing environment. To the west of Voiron, the terrain gradually rises towards the Chartreuse Mountains, a subrange of the French Alps. This area features steep slopes, forested hillsides, and dramatic limestone cliffs. The elevation increases significantly as you move closer to the mountain range, offering breathtaking views of the surrounding countryside. To the east, the land opens up into the Isère Valley, a broad and relatively flat expanse that stretches towards the city of Grenoble. This valley floor is dotted with small towns, agricultural fields, and meandering rivers, creating a stark contrast to the more rugged terrain to the west. The immediate vicinity of Voiron itself is characterized by gentle hills and small valleys, with elevations ranging from around 300 to 500 meters above sea level. These undulating landscapes are often covered in a patchwork of forests, pastures, and cultivated fields, giving the area a distinctly rural feel.

Potential Areas for Large-Scale Solar PV

When considering locations for large-scale solar photovoltaic (PV) installations near Voiron, several factors come into play. The most suitable areas would generally be found in the flatter, more open spaces to the east of Voiron, within the Isère Valley. The valley floor offers several advantages for solar PV development. Firstly, the relatively flat terrain makes construction and maintenance easier and more cost-effective. Secondly, the open nature of the valley means there are fewer obstacles that could cast shadows on solar panels, maximizing their exposure to sunlight throughout the day. Areas of particular interest might include former agricultural lands or brownfield sites that are no longer in use. These locations often provide large, uninterrupted spaces ideal for solar farms. Additionally, they are typically already connected to existing infrastructure, which can reduce the costs associated with grid connection. It's important to note that while the valley areas may be most suitable for large-scale installations, smaller solar projects could potentially be integrated into the hillier landscapes closer to Voiron. South-facing slopes, in particular, could offer good solar exposure, though the construction and maintenance challenges would be greater in these areas. Any solar PV development would, of course, need to be balanced with environmental considerations, agricultural needs, and local zoning regulations. Careful site selection and community engagement would be crucial to ensure that solar projects are implemented in a way that benefits the region while preserving its natural beauty and cultural 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.