Solar PV Analysis of Winterthur, Switzerland
Winterthur, Zurich, Switzerland, located at 47.4907°N, 8.7388°E in the Northern Temperate Zone, presents a mixed picture for solar PV energy generation throughout the year. The location experiences significant seasonal variations in solar energy production, which impacts the overall efficiency of solar installations.
Seasonal Solar Performance
Solar energy production in Winterthur peaks during the summer months, with an average daily output of 5.71 kWh per kW of installed capacity. Spring follows as the second most productive season, generating 4.85 kWh/day. Autumn sees a notable decline to 2.99 kWh/day, while winter experiences the lowest output at just 1.52 kWh/day.
These figures indicate that Winterthur's location is most favorable for solar energy generation from late spring through early autumn. During this period, longer daylight hours and higher sun angles contribute to increased solar panel efficiency.
Optimal Panel Installation
To maximize year-round solar energy production in Winterthur, Zurich, 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, accounting for seasonal variations in the sun's position.
Environmental and Weather Factors
Several factors can impact solar energy production in Winterthur:
- Snow cover: Winter snowfall can temporarily reduce panel efficiency by blocking sunlight.
- Cloud cover: The region experiences frequent cloudy days, particularly in autumn and winter, which can diminish solar output.
To mitigate these issues, consider installing panels at a steeper angle to encourage snow sliding off and using high-efficiency panels that perform better in low-light conditions. Regular maintenance, including snow removal, can also help maintain optimal performance.
While Winterthur's location presents challenges for year-round solar energy production, particularly in winter, it still offers substantial potential for renewable energy generation, especially during the warmer months. With proper installation and maintenance, solar PV systems can contribute significantly to the area's energy mix.
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 Winterthur
Seasonal solar PV output for Latitude: 47.4907, Longitude: 8.7388 (Winterthur, 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 41° South in Winterthur, Switzerland
To maximize your solar PV system's energy output in Winterthur, Switzerland (Lat/Long 47.4907, 8.7388) 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 Winterthur, 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 Winterthur, Switzerland. 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 | 50° 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 Winterthur, 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 Winterthur, Switzerland.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Winterthur, Switzerland
Winterthur, Switzerland is situated in a region characterized by gently rolling hills and valleys. The city itself lies in a broad valley, with the Töss River flowing through it. The surrounding landscape is a mix of urban areas, agricultural land, and forested hills.
To the north and east of Winterthur, the terrain gradually rises towards the Schauenberg, a modest hill that reaches about 890 meters above sea level. This area is dotted with small villages and farmland interspersed with patches of forest. To the south, the land becomes more hilly as it approaches the Zürichberg and Pfannenstiel ridges, which separate Winterthur from Lake Zürich.
The western side of Winterthur is characterized by the Eschenberg, a forested hill that rises to about 570 meters. This area provides a natural recreational space for the city's residents and offers panoramic views of the surrounding region.
When considering areas nearby that would be most suited for large-scale solar PV (photovoltaic) installations, several factors come into play. Ideally, solar farms require relatively flat or gently sloping land with good sun exposure. Given the topography around Winterthur, the most suitable areas for such installations would likely be:
- The agricultural lands to the north and northeast of the city, where the terrain is flatter and there are fewer obstructions to sunlight.
- Some of the south-facing slopes of the hills surrounding Winterthur, particularly those that are not heavily forested or used for agriculture.
- Former industrial sites or brownfields within the city limits or in nearby communities, which could be repurposed for solar energy production.
It's important to note that while these areas might be topographically suitable, other factors such as local zoning laws, environmental regulations, and grid connectivity would also need to be considered for any large-scale solar PV project. Additionally, given Switzerland's commitment to preserving its natural landscapes and agricultural heritage, any such development would likely need to balance energy production goals 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!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Saturday 20th of July 2024
Last Updated: Monday 21st of July 2025
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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.
