Horw, Switzerland, situated at coordinates 47.0179° N, 8.3064° E, presents a mixed landscape for solar PV 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 systems.

Seasonal Solar Performance

Summer stands out as the most productive season, with an impressive daily output of 5.66 kWh per kW of installed solar capacity. Spring follows closely, yielding 4.79 kWh/day. Autumn sees a considerable drop to 2.92 kWh/day, while winter performance plummets to a mere 1.46 kWh/day.

These figures highlight the stark contrast between the warm and cold months, with summer producing nearly four times the energy of winter. This disparity underscores the importance of maximizing energy collection during the more favorable seasons to offset the winter shortfall.

Optimal Panel Positioning

To achieve the best year-round performance, fixed solar panels should be tilted at a 40-degree angle facing south. This orientation helps capture the maximum amount of sunlight throughout the year, balancing the varying sun angles across seasons.

Environmental Considerations

While Horw's location is generally conducive to solar energy production, there are some environmental factors to consider:

• Snow accumulation in winter can significantly reduce panel efficiency
• Fog from nearby Lake Lucerne may occasionally diminish solar irradiance

To mitigate these issues, installers should consider using panels with anti-soiling coatings and ensure proper spacing for snow shedding. Additionally, slightly steeper panel angles can help with both snow removal and fog condensation runoff.

Conclusion

Despite the challenges posed by winter months and occasional adverse weather conditions, Horw's location remains viable for solar PV installation. The strong performance during spring and summer months can substantially offset the reduced winter output, making it a worthwhile investment for those looking to harness renewable energy in this Swiss locale.

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 Horw

Seasonal solar PV output for Latitude: 47.0179, Longitude: 8.3064 (Horw, 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 Horw, Switzerland

To maximize your solar PV system's energy output in Horw, Switzerland (Lat/Long 47.0179, 8.3064) 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 Horw, 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 Horw, 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 Horw, 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 Horw, 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 Horw, Switzerland

The topography around Horw, Switzerland, is characterized by a diverse and picturesque landscape typical of the Swiss Pre-Alps region. Situated on the northern shore of Lake Lucerne, Horw is nestled in a valley surrounded by rolling hills and mountains. The town itself lies on relatively flat terrain, but the surrounding area quickly rises in elevation as you move away from the lakeshore. To the north and west of Horw, the land gradually ascends into gentle hills covered with lush forests and meadows. These slopes are part of the Mount Pilatus massif, with the iconic Pilatus peak dominating the skyline to the southwest. The eastern side of Horw is bordered by the crystal-clear waters of Lake Lucerne, which adds to the scenic beauty of the area. As you move south from Horw, the terrain becomes more rugged and mountainous. The southern shore of Lake Lucerne is lined with steep cliffs and rocky outcrops, creating a dramatic contrast to the gentler northern shore where Horw is located. This varied topography contributes to the region's stunning views and diverse ecosystems.

Potential Areas for Large-Scale Solar PV

When considering areas near Horw that might be suitable for large-scale solar photovoltaic (PV) installations, several factors come into play. The ideal locations would have ample sunlight exposure, relatively flat terrain, and minimal environmental impact. The most promising areas for solar PV development would likely be found on the gently sloping hills to the north and northwest of Horw. These areas receive good sun exposure throughout the day and have a more gradual incline compared to the steeper mountain slopes to the south. The open meadows and agricultural lands in this region could potentially accommodate large solar arrays without significant alterations to the landscape. Another potential area for solar PV installations might be found on the plateau regions further north of Horw, where the terrain levels out before rising again into the higher Alps. These areas often have expansive, open spaces that could be suitable for solar farms, provided they are not protected agricultural lands or ecologically sensitive areas. It's important to note that while the region around Horw offers some potential for solar PV development, any large-scale installations would need to be carefully planned and implemented to balance energy production with the preservation of the area's natural beauty and ecological integrity. Switzerland's strict environmental regulations and the high value placed on preserving the alpine landscape would likely influence the feasibility and scale of any solar projects in the region.

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.