Dubrovnik, Croatia, situated at latitude 42.6451 and longitude 18.0941, offers a mixed potential for solar energy generation throughout the year. This coastal city in the Northern Temperate Zone experiences significant seasonal variations in solar output, which impacts the effectiveness of photovoltaic (PV) systems.

Seasonal Solar Performance

The solar energy production in Dubrovnik varies considerably across the seasons. Summer stands out as the most productive period, with an impressive daily output of 7.59 kWh per kW of installed solar capacity. Spring follows as the second-best season, generating 5.73 kWh/day. Autumn sees a notable decrease to 3.56 kWh/day, while winter experiences the lowest output at 1.99 kWh/day.

These figures indicate that Dubrovnik's location is particularly favorable for solar energy generation during the warmer months, from late spring through early autumn. This period aligns with the peak tourist season, potentially offering an excellent opportunity to offset increased energy demands.

Optimal Panel Installation

To maximize year-round solar production in Dubrovnik, fixed solar panels should be tilted at an angle of 36 degrees facing south. This optimal angle takes into account the city's latitude and seasonal sun positions, ensuring the best possible energy capture throughout the year.

Environmental and Weather Considerations

While Dubrovnik's climate is generally favorable for solar energy, there are some factors that could impact solar production:

1. Coastal humidity and salt spray: Being a coastal city, Dubrovnik experiences higher humidity levels and salt in the air, which can potentially corrode solar panel components over time.
2. Occasional strong winds: The city can experience bora winds, which might pose a risk to improperly secured solar installations.

To mitigate these issues, it's crucial to use corrosion-resistant materials and ensure proper sealing of all electrical components. Additionally, robust mounting systems should be employed to withstand potential strong winds. Regular cleaning and maintenance of the panels can also help maintain optimal performance by removing salt deposits and other debris.

Despite these challenges, Dubrovnik's location remains promising for solar energy production, especially during the sunnier months. With proper installation and maintenance, solar PV systems can effectively harness the abundant solar resources available in this picturesque Croatian city.

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

Link: Solar PV potential in Croatia by location

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

Seasonal solar PV output for Latitude: 42.6451, Longitude: 18.0941 (Dubrovnik, Croatia), 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 36° South in Dubrovnik, Croatia

To maximize your solar PV system's energy output in Dubrovnik, Croatia (Lat/Long 42.6451, 18.0941) throughout the year, you should tilt your panels at an angle of 36° 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 Dubrovnik, Croatia

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 Dubrovnik, Croatia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° South tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
26° South in Summer	46° South in Autumn	57° South in Winter	35° 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 Dubrovnik, Croatia

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 Dubrovnik, Croatia.

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 Dubrovnik, Croatia

Dubrovnik, the picturesque coastal city in southern Croatia, is nestled in a unique and dramatic landscape. The city itself clings to a narrow strip of land between the Adriatic Sea and the rugged Dinaric Alps. The topography around Dubrovnik is characterized by steep, rocky hillsides that rise sharply from the coastline, creating a stunning backdrop for the historic Old Town. Immediately surrounding Dubrovnik, the terrain is dominated by limestone karst formations. These rocky outcrops and cliffs create a rugged, almost moonlike landscape that extends inland from the coast. The hills are often sparsely vegetated, with hardy Mediterranean shrubs and small trees clinging to the rocky soil. This challenging terrain has historically made large-scale development difficult, contributing to the preservation of Dubrovnik's ancient character.

Coastal Features

The coastline near Dubrovnik is indented with numerous small bays and coves, formed where the limestone hills meet the sea. These inlets provide natural harbors and beautiful beaches, although many are pebbly rather than sandy due to the rocky nature of the surrounding land. Offshore, several small islands dot the azure waters of the Adriatic, adding to the area's scenic beauty.

Inland Topography

As one moves inland from Dubrovnik, the landscape becomes increasingly mountainous. The Dinaric Alps rise to impressive heights, with some peaks in the vicinity reaching over 1,000 meters above sea level. These mountains create a natural barrier between the coastal region and the interior of Croatia, historically isolating Dubrovnik and contributing to its unique cultural development.

Potential for Solar PV

When considering areas near Dubrovnik for large-scale solar PV installations, several factors must be taken into account. The region receives abundant sunshine, making it potentially suitable for solar energy production. However, the steep and rocky terrain immediately surrounding the city presents challenges for large-scale installations. The most suitable areas for solar PV development would likely be found on the gentler slopes and plateaus further inland from Dubrovnik. These areas, while still hilly, offer more extensive flat or gently sloping surfaces that could accommodate large arrays of solar panels. The Konavle region, southeast of Dubrovnik, features some broader valleys and less severe topography that might be more conducive to solar farm development. Another potential area for solar PV installations could be the Pelješac Peninsula to the northwest of Dubrovnik. This long, finger-like projection of land has some flatter areas and gentler slopes that could be suitable for solar energy production, particularly on its southern-facing aspects. It's important to note that any large-scale solar development in this region would need to carefully balance energy production goals with environmental and cultural preservation concerns. The unique landscape around Dubrovnik is not only of ecological importance but also crucial to the area's tourism industry, which relies heavily on its natural beauty.

Croatia solar PV Stats as a country

Croatia ranks 84th in the world for cumulative solar PV capacity, with 109 total MW's of solar PV installed. Each year Croatia is generating 27 Watts from solar PV per capita (Croatia ranks 60th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Croatia?

Yes, there are incentives for businesses wanting to install solar energy in Croatia. The Croatian government offers a number of financial incentives and subsidies for businesses that install solar energy systems. These include grants, tax credits, and other forms of support. Additionally, the government has set up a feed-in tariff system which guarantees a certain price per kilowatt hour (kWh) generated from renewable sources such as solar energy. 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 Croatia? 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.