Onex, Geneva, Switzerland, situated at 46.1877° N, 6.0981° E, offers a moderate potential for solar energy generation throughout the year. This location in the Northern Temperate Zone experiences significant seasonal variations in solar output, which impacts the overall efficiency of photovoltaic (PV) systems.

Seasonal Solar Performance

The solar energy production in Onex fluctuates considerably across the four seasons. Summer stands out as the most productive period, with an average 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 notable decrease to 3.09 kWh/day, while winter experiences the lowest output at 1.58 kWh/day.

These figures highlight that the most ideal times for solar energy generation in Onex are during the summer months, followed by spring. The longer daylight hours and higher sun angles during these seasons contribute significantly to the increased energy production.

Optimal Panel Installation

For fixed panel installations in Onex, Geneva, the ideal tilt angle to maximize year-round solar production is 40 degrees facing South. This angle is calculated to optimize the panels' exposure to sunlight throughout the year, considering the location's latitude and the sun's changing position across seasons.

Environmental and Weather Factors

While Onex's location is generally favorable for solar energy, there are some environmental and weather factors that could potentially impact solar production:

1. Snow accumulation in winter: Heavy snowfall can temporarily reduce panel efficiency by blocking sunlight.
2. Cloud cover: The region experiences frequent cloudy days, particularly in autumn and winter, which can decrease solar output.

To mitigate these factors, consider the following preventative measures:

• Install panels at a steeper angle to promote snow sliding off
• Use snow-shedding coatings on panels
• Implement regular panel cleaning and maintenance
• Consider bifacial panels to capture reflected light on cloudy days

By addressing these potential challenges, solar installations in Onex can maximize their energy production potential throughout the year, despite the seasonal variations and environmental factors.

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 Onex

Seasonal solar PV output for Latitude: 46.1877, Longitude: 6.0981 (Onex, 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 Onex, Switzerland

To maximize your solar PV system's energy output in Onex, Switzerland (Lat/Long 46.1877, 6.0981) 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 Onex, 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 Onex, 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	49° 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 Onex, 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 Onex, 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 Onex, Switzerland

The topography around Onex, Switzerland, is characterized by a diverse landscape that combines urban areas with natural features. Onex itself is situated on a plateau overlooking the Rhône River, with an elevation of approximately 430 meters above sea level. The surrounding region is part of the Geneva basin, which is nestled between the Jura Mountains to the northwest and the Alps to the southeast. To the north and east of Onex, the terrain gradually rises towards the foothills of the Jura Mountains. This area features rolling hills, small valleys, and patches of forest interspersed with agricultural land. The landscape becomes more rugged as one moves further north, with steeper slopes and denser woodland. South of Onex, the land slopes gently towards the Rhône River, which flows southwest through Geneva before entering France. The river valley is relatively flat and wide, creating a natural corridor through the region. Beyond the river, the terrain begins to rise again towards the Salève, a prominent limestone ridge that forms a natural border between Switzerland and France. To the west, the landscape is predominantly urban, as Onex is part of the greater Geneva metropolitan area. This region is characterized by a mix of residential neighborhoods, commercial districts, and pockets of green spaces.

Areas Suitable 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, including available land, sun exposure, and minimal shading. Based on the topography of the region, the following areas could be potential candidates: The agricultural lands to the north and east of Onex, particularly those on south-facing slopes, could be suitable for solar PV installations. These areas often have large, open fields that receive good sun exposure throughout the day. However, care would need to be taken to balance solar energy production with agricultural needs. The flatter areas along the Rhône River valley, south of Onex, could also be potential sites for solar farms. These locations benefit from minimal shading due to the open landscape and could accommodate large arrays of solar panels. However, flood risk and land-use regulations would need to be carefully considered. Some of the less steep hillsides in the Jura foothills might also be appropriate for solar installations, particularly those with a southern exposure. These areas could potentially combine solar energy production with grazing or other compatible land uses. It's important to note that while these areas may be topographically suitable, any large-scale solar PV project would need to take into account various other factors, including local zoning laws, environmental impact assessments, grid connection possibilities, and community acceptance. Additionally, given Switzerland's commitment to preserving its natural landscapes, any such projects would likely face significant scrutiny and would need to be developed in harmony with environmental and cultural considerations.

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.