Solar Energy Potential in Hallein, Salzburg, Austria

Hallein, Salzburg, Austria, located at latitude 47.6817° and longitude 13.0974° in the Northern Temperate Zone, presents a moderate location for solar PV energy generation with significant seasonal variations. The energy output fluctuates considerably throughout the year, with production peaking in summer and dropping substantially during winter months. The seasonal solar energy production in Hallein shows clear patterns, with summer being the most productive season at 5.74 kWh per day for each kilowatt of installed capacity. Spring follows as the second most productive season with 4.28 kWh/day, while autumn generates 3.01 kWh/day. Winter, as expected in this northern latitude, produces the least energy at only 1.68 kWh/day per installed kilowatt. For maximizing year-round solar energy production in Hallein, Salzburg, fixed solar panels should be installed at a tilt angle of 41 degrees facing South. This specific angle has been calculated to optimize the annual solar energy capture based on the location's latitude and seasonal solar patterns.

Seasonal Considerations

The substantial difference between summer and winter production (over three times more energy in summer) indicates that Hallein is far from ideal for consistent year-round solar generation. The location experiences approximately 3.4 times more daily energy production in summer compared to winter, creating a significant seasonal imbalance. The most favorable periods for solar energy production are from late spring through early autumn (May through September), when longer days and higher sun angles provide optimal conditions for solar PV systems.

Environmental and Weather Challenges

Several environmental factors in Hallein may impact solar energy production:

• Alpine snowfall: The location's proximity to the Alps means significant snowfall during winter months can cover panels and further reduce the already limited winter production.
• Mountain shadowing: The surrounding mountainous terrain may cast shadows on solar installations during early morning and late afternoon, particularly in winter when the sun stays lower in the sky.
• Fog and cloud cover: The river valley location can experience frequent fog, especially in autumn and winter months.

Preventative Measures

To maximize solar energy production despite these challenges: 1. Install panels at steeper angles (beyond the recommended 41 degrees) in areas prone to heavy snowfall to promote snow sliding off. 2. Consider snow removal systems or regular manual clearing during winter months. 3. Conduct thorough site assessments to identify potential shadowing from nearby mountains or buildings, particularly during winter when shadows are longest. 4. Use high-efficiency panels that perform better in diffuse light conditions typical of cloudy or foggy days. 5. Consider dual-axis tracking systems for larger installations to maximize energy capture throughout the year, though this adds complexity and cost. While Hallein can certainly support viable solar energy systems, supplementary energy sources would be advisable during the winter months when production drops to less than one-third of summer levels.

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 124 locations across Austria. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in Austria by location

Solar output per kW of installed solar PV by season in Hallein

Seasonal solar PV output for Latitude: 47.6817, Longitude: 13.0974 (Hallein, Austria), 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 Hallein, Austria

To maximize your solar PV system's energy output in Hallein, Austria (Lat/Long 47.6817, 13.0974) 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 Hallein, Austria

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 Hallein, Austria. 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	51° 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 Hallein, Austria

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 Hallein, Austria.

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 Hallein, Austria

Hallein, situated in the Austrian state of Salzburg, presents a varied topographic landscape characterized by its position in the Northern Limestone Alps. The town lies in the Salzach River valley, with the river itself flowing through the settlement. This valley setting means Hallein is surrounded by significant elevation changes, with mountains rising on multiple sides of the town. To the east of Hallein stands the imposing Untersberg massif, which forms a natural border between Austria and Germany, reaching heights of approximately 1,800 meters. The western side features the Tennen Mountains, creating a dramatic backdrop to the town. Meanwhile, to the south, the landscape transitions toward the higher Alpine regions.

Valley Characteristics

The Salzach Valley where Hallein is located provides a relatively flat area compared to the surrounding mountainous terrain. This valley runs north-south, with Hallein positioned about 15 kilometers south of Salzburg city. The valley floor sits at approximately 450 meters above sea level, while the surrounding peaks can rise more than 1,000 meters higher. The valley's orientation creates distinct microclimates, with north-facing and south-facing slopes receiving different levels of solar exposure throughout the year. The Salzach River, flowing northward through the valley, has historically shaped the landscape through erosion and deposition, creating terraces and flatter areas adjacent to the riverbed.

Potential for Solar PV Development

For large-scale solar photovoltaic (PV) installations, several factors must be considered within this topographic context. The most suitable areas would generally include: The south-facing slopes at lower elevations present some of the best opportunities for solar PV development. These areas receive more direct sunlight throughout the year compared to north-facing slopes. Particularly promising are the gentler south-facing hillsides northwest of Hallein and southeast toward Bad Dürrnberg. The valley floor, particularly in areas not prone to flooding or morning fog, offers flat terrain that simplifies construction and maintenance of large installations. The wider sections of the Salzach Valley between Hallein and Golling an der Salzach contain agricultural land that could potentially accommodate solar arrays.

Topographic Challenges

Despite these opportunities, the topography around Hallein presents several challenges for large-scale solar development. The mountainous terrain creates significant shading effects, especially during winter months when the sun angle is lower. This can substantially reduce the efficiency of solar installations in certain locations. Additionally, the steepness of many slopes in the region makes construction difficult and expensive. Areas with gradients exceeding 15-20% typically become impractical for large solar arrays due to increased installation costs and potential soil stability issues. The region's alpine character also means that some of the sunniest locations are at higher elevations, where access is limited and environmental protections may restrict development. The Tennen Mountains and Untersberg massif, while receiving abundant sunlight on their southern faces, would present significant logistical challenges for large-scale installations.

Most Promising Areas

Considering these factors, the most suitable locations for large-scale solar PV development near Hallein would be: The broader, flatter sections of the Salzach Valley floor, particularly in areas south of Hallein toward Golling where the valley widens. These areas offer easier construction conditions while still receiving good solar exposure. Gently sloping, south-facing agricultural lands on the lower mountain flanks, especially in the transitional zones between the valley floor and steeper mountain slopes. The areas around Bad Dürrnberg and the lower western slopes of the Tennen Mountains offer promising topographic conditions. Former industrial or commercial sites within and around Hallein itself may provide opportunities for solar development without impacting natural landscapes. These brownfield sites often have existing infrastructure connections that can reduce development costs. The topographic reality around Hallein means that truly large-scale solar installations would likely need to be distributed across multiple smaller sites rather than concentrated in a single massive array, given the limited availability of extensive, flat, unshaded land in this Alpine region.

Austria solar PV Stats as a country

Austria ranks 28th in the world for cumulative solar PV capacity, with 2,692 total MW's of solar PV installed. This means that 3.40% of Austria's total energy as a country comes from solar PV (that's 25th in the world). Each year Austria is generating 302 Watts from solar PV per capita (Austria ranks 14th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Austria?

Yes, there are several incentives for businesses wanting to install solar energy in Austria. The Austrian government offers a range of financial support measures, including grants and loans, as well as tax breaks and other incentives. Additionally, the Austrian Energy Agency (AEA) provides information on funding opportunities for renewable energy projects. Furthermore, businesses can benefit from the Feed-in Tariff (FiT), which guarantees a fixed price for electricity generated from renewable sources such as solar energy.

Do you have more up to date information than this on incentives towards solar PV projects in Austria? 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.