Versoix, Switzerland, situated at latitude 46.2823 and longitude 6.1676, presents a mixed picture for solar energy generation throughout the year. This location in the Northern Temperate Zone experiences significant seasonal variations in solar output, which directly impacts the efficiency of photovoltaic (PV) systems.

Seasonal Solar Performance

Summer stands out as the most productive season, with an impressive daily output of 6.00 kWh per kW of installed solar capacity. Spring follows as the second-best season, generating 4.89 kWh/day. Autumn sees a considerable drop to 3.09 kWh/day, while winter experiences the lowest output at just 1.58 kWh/day.

These figures highlight that the ideal times for solar energy generation in Versoix are late spring, summer, and early autumn. During these periods, longer daylight hours and higher sun angles contribute to increased solar panel efficiency.

Optimizing Panel Installation

To maximize year-round solar production at this location, fixed solar panels should be installed at a tilt angle of 40 degrees facing south. This angle is calculated to capture the most sunlight throughout the year, considering the Earth's elliptical orbit and Versoix's specific latitude.

Environmental and Weather Factors

Several factors could potentially impede solar production in Versoix:

1. Snow accumulation in winter, which can cover panels and reduce output
2. Fog from nearby Lake Geneva, potentially reducing sunlight exposure

To mitigate these issues, consider installing panels at a steeper angle to encourage snow sliding off. Additionally, regular panel cleaning and the use of anti-reflective coatings can help maximize energy production in foggy conditions.

While Versoix's location isn't ideal for year-round solar production due to significant seasonal variations, proper installation techniques and maintenance can still make solar PV systems a viable renewable energy option for this Swiss town.

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 245 locations across Switzerland. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Switzerland by location

Solar output per kW of installed solar PV by season in Versoix

Seasonal solar PV output for Latitude: 46.2823, Longitude: 6.1676 (Versoix, Switzerland), 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 40° South in Versoix, Switzerland

To maximize your solar PV system's energy output in Versoix, Switzerland (Lat/Long 46.2823, 6.1676) throughout the year, you should tilt your panels at an angle of 40° 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 Versoix, Switzerland

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 Versoix, Switzerland. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 40° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
30° South in Summer	50° South in Autumn	60° South in Winter	39° 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 Versoix, Switzerland

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 Versoix, Switzerland.

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 Versoix, Switzerland

Versoix, Switzerland, nestled along the western shore of Lake Geneva, boasts a diverse and picturesque topography. The landscape surrounding this charming town is characterized by a gentle slope that rises from the lakeshore towards the west. As one moves away from the lake, the terrain gradually becomes more undulating, with rolling hills and small valleys creating a patchwork of varied elevations. The area immediately surrounding Versoix features a mix of urban development near the lake and more rural, agricultural land as you move inland. The town itself is situated on relatively flat ground, but as you venture westward, the landscape becomes more pronounced in its variations. Small streams and creeks crisscross the region, carving subtle valleys and contributing to the area's lush vegetation. To the northwest of Versoix, the terrain becomes more pronounced, with the foothills of the Jura Mountains beginning to make their presence felt. These hills, while not particularly steep, provide a noticeable contrast to the gentler slopes near the lake. The Jura Mountains themselves, visible in the distance, form a dramatic backdrop to the region's topography.

Potential Areas for Large-Scale Solar PV

When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, several factors come into play. The ideal locations would combine ample sunlight exposure, minimal shading, and suitable land availability. The gently sloping areas to the west and southwest of Versoix present promising opportunities for solar PV development. These locations benefit from good sun exposure throughout the day and have fewer obstacles that might cast shadows on solar panels. The gradual incline of the land in these areas could actually be advantageous, as it allows for optimal panel orientation towards the sun. Agricultural lands in the vicinity, particularly those that are less productive or have been set aside, could also be potential sites for solar farms. These areas often provide large, open spaces that are well-suited to expansive solar installations. However, it's important to note that the region's natural beauty and agricultural heritage would need to be carefully considered in any large-scale solar development plans. Balancing renewable energy goals with preservation of the local landscape and ecosystems would be crucial in identifying the most appropriate sites for solar PV projects in the Versoix area.

Switzerland solar PV Stats as a country

Switzerland ranks 25th in the world for cumulative solar PV capacity, with 3,449 total MW's of solar PV installed. This means that 4.70% of Switzerland's total energy as a country comes from solar PV (that's 16th in the world). Each year Switzerland is generating 399 Watts from solar PV per capita (Switzerland ranks 6th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Switzerland?

Yes, there are several incentives for businesses wanting to install solar energy in Switzerland. The Swiss Federal Office of Energy (SFOE) offers a range of financial support measures for businesses that want to invest in renewable energy sources such as solar power. These include grants, loans and tax deductions. Additionally, the Swiss government has set up a feed-in tariff system which guarantees a fixed price for electricity generated from renewable sources such as solar power. This helps to make investing in solar energy more attractive for businesses.

Do you have more up to date information than this on incentives towards solar PV projects in Switzerland? 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.