Daillens, Vaud, Switzerland offers moderate solar energy potential for photovoltaic installations, though the location faces typical challenges associated with its Northern Temperate Zone climate and alpine proximity.

Seasonal Solar Production Patterns

The solar energy output at this location varies dramatically throughout the year. Summer provides the strongest performance at 6.01kWh per day per kW of installed capacity, making it the prime season for solar generation. Spring follows as the second-best period with 4.89kWh daily output per kW, offering excellent conditions as daylight hours increase and weather improves. Autumn sees a significant drop to 3.10kWh per day per kW as conditions deteriorate heading into winter. Winter presents the most challenging period, producing only 1.63kWh daily per kW of installed solar capacity - less than one-third of summer production levels.

Optimal Installation Configuration

For maximum year-round energy production at Daillens, Vaud, fixed solar panels should be tilted at 40 degrees facing south. This angle has been calculated to optimize total annual output by accounting for the sun's varying elevation throughout the year and weighting these angles based on actual solar irradiance potential.

Local Factors Affecting Solar Performance

Several environmental factors at this Swiss location can significantly impact solar energy production:

• Snow accumulation: Winter snow can completely block solar panels, eliminating energy production for extended periods
• Alpine weather patterns: The proximity to mountainous terrain increases cloud cover and precipitation frequency
• Temperature variations: Extreme cold can affect panel efficiency and mounting system integrity
• Humidity and fog: Common in Swiss valleys, reducing solar irradiance even on partially sunny days

Preventative Installation Measures

To maximize energy production despite these challenges, several installation strategies prove effective. Installing panels at the recommended 40-degree tilt helps snow slide off naturally rather than accumulating. Ensuring adequate spacing between panel rows prevents snow from one row blocking panels below. Using mounting systems rated for heavy snow loads prevents structural damage during winter months. Installing heating elements or automatic cleaning systems can remove snow and ice buildup, though the cost-benefit analysis varies depending on local electricity prices. Selecting panels with anti-reflective coatings and good low-light performance helps maintain output during cloudy conditions typical of the region. Regular maintenance scheduling, particularly before and after winter, ensures optimal system performance year-round. The location remains viable for solar installations, but realistic expectations about winter performance and proper system design are essential for successful projects.

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 Daillens

Seasonal solar PV output for Latitude: 46.6221, Longitude: 6.5427 (Daillens, 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 Daillens, Switzerland

To maximize your solar PV system's energy output in Daillens, Switzerland (Lat/Long 46.6221, 6.5427) 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 Daillens, 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 Daillens, 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 Daillens, 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 Daillens, 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 Daillens, Switzerland

Topographical Features Around Daillens

Daillens sits in the heart of the Swiss Plateau, positioned between Lake Geneva to the south and the Jura Mountains to the northwest. This region is characterized by gently rolling hills and relatively flat agricultural plains that stretch across much of western Switzerland. The terrain around Daillens typically ranges from 400 to 600 meters above sea level, creating a landscape of moderate undulations rather than dramatic elevation changes. The area features a mix of cultivated farmland, small woodlands, and scattered villages connected by a network of country roads. The topography is generally open, with few significant obstacles that would create substantial shadowing effects. Small streams and valleys cut through the landscape, but these are typically shallow depressions rather than deep gorges. To the east and southeast, the land gradually rises toward the foothills of the Alps, while westward the terrain remains consistently gentle. The Swiss Plateau's characteristic bocage landscape includes hedgerows and small forest patches, but these are interspersed with extensive open areas that receive unobstructed sky exposure.

Optimal Areas for Large-Scale Solar Development

The most promising locations for substantial solar photovoltaic installations lie on the south-facing slopes of the rolling hills that dominate this region. These elevated positions benefit from excellent exposure while avoiding the shadowing effects that can occur in valley bottoms during winter months when the sun travels a lower arc across the sky. Agricultural areas with gentle southern exposures present particularly attractive opportunities, as the existing open character of farmland eliminates the need for extensive clearing. The plateau's characteristic terraced hillsides, where they exist, could accommodate ground-mounted systems that follow the natural contours of the land. Areas immediately south and southwest of Daillens offer especially favorable conditions, where the topography provides natural south-facing orientations without significant obstructions from neighboring hills or forest cover. The relatively stable geology of the Swiss Plateau also provides solid foundations for large installations. Flat or nearly flat agricultural plains in the region, while lacking optimal tilt angles, compensate through their expansive character and minimal shading issues. These areas allow for flexible system designs and can accommodate the substantial footprints required for utility-scale developments. The gentle nature of the topography throughout this region means that most areas within a 10-kilometer radius of Daillens could potentially support solar development, with the primary considerations being land use permissions and grid connection infrastructure rather than challenging terrain features.

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.