Bidart, France presents a moderately favorable location for year-round solar PV energy generation, though with significant seasonal variations that potential solar installers should carefully consider.

Seasonal Solar Performance

The solar energy output at this coastal location varies considerably throughout the year. Summer delivers the strongest performance at 5.94 kWh per day per kW of installed capacity, making it the peak season for solar generation. Spring follows closely behind with excellent output of 5.30 kWh per day per kW, demonstrating that late spring months can be nearly as productive as summer. Autumn shows a notable decline to 3.15 kWh per day per kW, which is still reasonable for maintaining energy production during the transitional months. Winter presents the most challenging period with only 1.76 kWh per day per kW, representing less than 30% of summer production levels.

Optimal Installation Configuration

For maximum year-round energy production at Bidart, solar panels should be installed at a fixed tilt angle of 37 degrees facing south. This optimal angle is calculated by analyzing daily solar elevation angles throughout the year and weighting them according to solar irradiance potential, accounting for Earth's elliptical orbit around the sun.

Environmental and Weather Challenges

Several local factors in Bidart could potentially impact solar panel performance and require preventative measures:

• Salt air corrosion: Being located on the Atlantic coast, panels face constant exposure to salt-laden air that can corrode mounting hardware and panel frames over time
• High humidity and marine moisture: The coastal environment creates persistent moisture that can affect electrical connections and promote corrosion
• Atlantic storm systems: The location experiences strong winds and severe weather from Atlantic storms, particularly during autumn and winter months
• Sand and debris accumulation: Coastal winds can deposit sand, salt crystals, and organic matter on panel surfaces, reducing light transmission

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies should be implemented. Use marine-grade aluminum mounting systems with stainless steel hardware specifically designed to resist salt corrosion. All electrical connections should be sealed with marine-grade weatherproofing compounds and housed in corrosion-resistant enclosures. Install panels with adequate spacing to promote air circulation and faster drying after moisture exposure. Consider slightly steeper mounting angles than the optimal 37 degrees to encourage better self-cleaning through rainfall runoff, though this should be balanced against the slight reduction in optimal sun angle. Establish a regular maintenance schedule that includes cleaning panels more frequently than inland installations, particularly after storms or periods of high wind. Anti-reflective coatings designed for marine environments can help panels shed salt deposits more effectively while maintaining light transmission efficiency.

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 Bidart

Seasonal solar PV output for Latitude: 43.4395, Longitude: -1.596 (Bidart, 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 37° South in Bidart, France

To maximize your solar PV system's energy output in Bidart, France (Lat/Long 43.4395, -1.596) throughout the year, you should tilt your panels at an angle of 37° 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 Bidart, 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 Bidart, France. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 37° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
27° South in Summer	47° South in Autumn	58° South in Winter	36° 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 Bidart, 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 Bidart, 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 Bidart, France

Topographical Features Around Bidart

Bidart sits along the rugged Atlantic coastline of southwestern France in the Basque region, positioned on elevated terrain that offers dramatic views over the Bay of Biscay. The immediate area features rolling hills and coastal cliffs that rise moderately from the ocean, creating a landscape characterized by gentle undulations rather than steep mountainous terrain. The elevation around Bidart typically ranges from sea level at the coast to approximately 150 meters inland, with the town itself perched on bluffs overlooking the Atlantic.

The topography transitions from the rocky coastline through agricultural valleys and pastoral hillsides as one moves eastward into the Basque countryside. These inland areas feature broader, more gently sloping terrain with good southern exposure, making them potentially suitable for large-scale solar installations. The coastal influence moderates the local climate, though the immediate shoreline areas experience more variable weather conditions due to Atlantic weather systems.

Optimal Areas for Large-Scale Solar Development

The most promising locations for substantial solar photovoltaic installations lie inland from Bidart, particularly in the agricultural zones extending eastward toward the communities of Arbonne and Saint-Pée-sur-Nivelle. These areas offer several advantages including more consistent weather patterns away from direct coastal influence, larger available land parcels, and terrain that slopes gently southward to maximize solar exposure throughout the day.

The plateau areas southeast of Bidart, in the direction of Ahetze and beyond, present excellent opportunities for solar development. This region features relatively flat to gently rolling topography with good drainage, stable soil conditions, and existing agricultural use that could potentially accommodate solar installations while maintaining some farming activities beneath or between panel arrays. The slight elevation of these inland areas also provides natural drainage and reduces concerns about coastal flooding or salt spray that might affect equipment longevity.

Areas to the northeast, moving toward the foothills of the Pyrenees, become increasingly hilly and may present challenges for large-scale installations due to irregular terrain and shading from surrounding ridges. However, some south-facing slopes in this region could still be viable for smaller utility-scale projects, particularly those that can take advantage of the natural contours to optimize panel orientation.

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.