Villmergen, Aargau, Switzerland, situated at latitude 47.3523 and longitude 8.2454, presents a mixed picture for solar energy generation. This location in the Northern Temperate Zone experiences significant seasonal variations in solar output, which impacts the overall efficiency of photovoltaic (PV) systems throughout the year.

Seasonal Solar Performance

The solar energy potential in Villmergen fluctuates considerably across the four seasons. Summer stands out as the most productive period, with an average daily output of 5.66 kWh per kW of installed solar capacity. Spring follows as the second-best season, yielding 4.79 kWh/day. Autumn sees a notable decrease to 2.92 kWh/day, while winter experiences the lowest production at just 1.46 kWh/day.

These figures indicate that solar energy generation in Villmergen is most effective 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 Villmergen, Aargau, fixed solar panels should be installed at a tilt angle of 40 degrees facing south. This angle is calculated to optimize the panels' exposure to sunlight throughout the year, taking into account the location's latitude and seasonal sun paths.

Environmental and Weather Considerations

While Villmergen's location is generally suitable for solar energy production, there are some environmental factors to consider:

• Snowfall: Winter months may see snow accumulation on panels, reducing efficiency. Regular panel cleaning or the installation of snow guards can mitigate this issue.
• Cloud cover: The region experiences frequent cloudy days, especially in autumn and winter, which can impact solar output. Using high-efficiency panels can help maximize energy production even in less-than-ideal conditions.

To address these challenges, consider implementing a dual-axis tracking system for panels, which can increase energy yield by following the sun's path. Additionally, using micro-inverters or power optimizers can help maintain system efficiency even when some panels are partially shaded or covered.

In conclusion, while Villmergen's location presents some challenges for year-round solar energy production, particularly in winter, it still offers substantial potential, especially during the warmer months. With proper installation techniques and equipment choices, a solar PV system can be a viable and beneficial energy solution for this Swiss location.

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 Villmergen

Seasonal solar PV output for Latitude: 47.3523, Longitude: 8.2454 (Villmergen, 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 Villmergen, Switzerland

To maximize your solar PV system's energy output in Villmergen, Switzerland (Lat/Long 47.3523, 8.2454) 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 Villmergen, 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 Villmergen, 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
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 Villmergen, 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 Villmergen, 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 Villmergen, Switzerland

The topography around Villmergen, Switzerland, is characterized by a mix of gently rolling hills, fertile valleys, and small plateaus. This region, located in the Swiss Plateau (Mittelland), sits at an elevation of approximately 400 meters above sea level. The landscape is dotted with lush green fields, interspersed with patches of forest and small streams. To the north and east of Villmergen, the terrain is relatively flat, with subtle undulations that create a patchwork of agricultural land and small settlements. This area is part of the broader Reuss Valley, which stretches northward towards the confluence of the Reuss and Aare rivers. The valley floor provides ample open space with minimal obstructions. Heading south and west from Villmergen, the landscape becomes more varied, with more pronounced hills and steeper slopes. These hills are part of the foothills of the Jura Mountains, which lie further to the west. While not as dramatic as the Alps, these hills nonetheless create a more diverse topographical profile compared to the flatter areas to the north and east.

Suitability for Large-Scale Solar PV

When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, the flatter regions to the north and east of Villmergen present the most promising opportunities. These areas offer several advantages for solar energy production: Firstly, the relatively level terrain in the Reuss Valley provides large, uninterrupted spaces that could accommodate extensive solar panel arrays. The lack of significant elevation changes means less shading from nearby landforms, allowing for optimal sun exposure throughout the day. Secondly, the agricultural nature of much of this land means there are fewer built structures or dense forests that might obstruct sunlight or complicate the installation process. Many of these fields are already cleared and easily accessible, which could simplify construction and maintenance of solar facilities. Additionally, the proximity to existing infrastructure, including roads and power distribution networks, makes these areas attractive for large-scale solar projects. The ability to easily connect to the grid and transport materials is a significant advantage. While the hillier regions to the south and west of Villmergen might offer some suitable locations for solar PV, they generally present more challenges. The varied topography can create issues with shading and might require more complex and costly installation procedures. However, south-facing slopes in these areas could potentially be utilized for smaller-scale solar installations if properly situated to maximize sun exposure. It's important to note that any large-scale solar PV project would need to carefully balance energy production goals with environmental and agricultural considerations, given the region's importance for farming and its natural beauty.

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

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

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.