Goldau, Schwyz, Switzerland, situated at coordinates 47.05°N, 8.5517°E, 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 impacts the overall efficiency of photovoltaic (PV) systems.

Seasonal Solar Performance

The solar energy production in Goldau varies considerably across the four meteorological seasons:

• Summer: 5.66 kWh/day per kW installed
• Spring: 4.79 kWh/day per kW installed
• Autumn: 2.92 kWh/day per kW installed
• Winter: 1.46 kWh/day per kW installed

These figures indicate that summer and spring are the most productive seasons for solar energy generation in Goldau, Schwyz, while autumn and especially winter see a significant drop in output.

Optimal Panel Placement

For fixed panel installations in Goldau, Schwyz, the ideal tilt angle to maximize year-round solar production is 40 degrees facing South. This angle takes into account the location's latitude and the Earth's elliptical orbit, optimizing energy capture across all seasons.

Peak Production Periods

The most ideal times for solar energy generation in Goldau are from late spring through early autumn. During these months, longer daylight hours and higher sun angles contribute to increased solar panel efficiency. However, even during these peak periods, factors such as cloud cover can affect daily output.

Challenges and Mitigation Strategies

Goldau's location presents some challenges for solar energy production. The significant drop in winter output is a primary concern, largely due to shorter days, lower sun angles, and increased cloud cover. Additionally, the region can experience heavy snowfall, which may temporarily cover panels and reduce efficiency.

To mitigate these issues, several preventative measures can be taken: 1. Use high-efficiency panels designed for low-light conditions to improve performance during winter months. 2. Install panels at the optimal 40-degree angle to help shed snow and maximize year-round production. 3. Implement a regular cleaning schedule, especially after snowfall, to ensure panels remain unobstructed. 4. Consider a dual-axis tracking system for larger installations to maximize solar exposure throughout the year.

While Goldau's location presents challenges for year-round solar energy production, particularly in winter, the strong performance during summer and spring makes it a viable option for supplementary energy generation. With proper planning and mitigation strategies, solar PV systems can still provide significant benefits to users in 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 Goldau

Seasonal solar PV output for Latitude: 47.05, Longitude: 8.5517 (Goldau, 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 Goldau, Switzerland

To maximize your solar PV system's energy output in Goldau, Switzerland (Lat/Long 47.05, 8.5517) 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 Goldau, 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 Goldau, 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 Goldau, 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 Goldau, 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 Goldau, Switzerland

The area surrounding Goldau, Switzerland, is characterized by a diverse and picturesque topography typical of the Swiss Pre-Alps. Situated in the canton of Schwyz, Goldau lies in a valley nestled between several prominent mountains and hills. The landscape is a mix of steep slopes, rolling hills, and flat valley floors, creating a dramatic and varied terrain. To the east of Goldau rises the imposing Rigi mountain, often referred to as the "Queen of the Mountains." Its steep slopes and rocky outcrops dominate the eastern skyline, reaching an elevation of over 1,700 meters above sea level. The western side of the valley is bordered by the Rossberg mountain, known for its tragic landslide in 1806 that devastated the original village of Goldau. The valley floor where Goldau is located is relatively flat, formed by the debris from the Rossberg landslide. This area is now home to the modern town and its infrastructure. The valley stretches north towards Lake Zug and south towards Lake Lauerz, both of which contribute to the region's hydrological features.

Potential for Large-scale Solar PV

When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, several factors must be taken into account. The mountainous terrain presents challenges for such projects, but there are potential locations that could be suitable: The valley floor around Goldau offers some flat areas that could accommodate solar arrays. These locations benefit from being easily accessible and having existing infrastructure nearby. However, the available space may be limited due to urban development and agricultural use. South-facing slopes on the lower parts of the surrounding mountains, particularly those with gentler gradients, could be potential sites for solar installations. These areas would receive more direct sunlight throughout the day, increasing energy production efficiency. However, care must be taken to avoid areas of ecological importance or those prone to landslides. The shores of nearby Lake Lauerz, especially on its northern side, might offer suitable locations for solar farms. These areas are generally flatter and could provide the necessary space for large-scale installations. However, potential impacts on the lake's ecosystem and scenic value would need to be carefully considered. It's important to note that while the region's topography presents some challenges for large-scale solar PV, Switzerland's commitment to renewable energy might drive innovative solutions. These could include integrating solar panels into existing structures or developing new technologies adapted to mountainous terrains. Any large-scale solar project in this area would require thorough environmental impact assessments and consideration of the region's natural beauty and tourism value.

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.