Solar Energy Potential in Sopot, Plovdiv, Bulgaria
The location of Sopot, Plovdiv, Bulgaria, situated at 42.6438° N, 24.753° E, offers varying potential for solar energy generation throughout the year. This Northern Temperate Zone location experiences significant seasonal fluctuations in solar output, which impacts the overall efficiency of solar PV systems. During summer, Sopot enjoys its peak solar energy production, with an impressive 6.93 kWh per day for each kilowatt of installed solar capacity. This makes it an excellent time for harnessing solar power, with long days and abundant sunshine contributing to high energy yields. Spring follows as the second most productive season, generating 5.11 kWh per day per kW installed. This period offers a good balance of sunshine and moderate temperatures, making it another favorable time for solar energy production.Seasonal Variations and Challenges
Autumn sees a significant drop in solar output, with 3.20 kWh per day per kW installed. While still providing a reasonable amount of energy, the shorter days and increased cloud cover begin to impact solar efficiency. Winter presents the greatest challenge for solar energy production in Sopot, Plovdiv, with only 1.96 kWh per day per kW installed. The combination of shorter daylight hours, lower sun angles, and potentially cloudy or snowy conditions dramatically reduces solar panel efficiency during this season.Optimizing Solar Installation
To maximize year-round solar energy production in Sopot, Plovdiv, it's crucial to install panels at the ideal tilt angle of 36 degrees facing south. This orientation helps capture the most sunlight throughout the year, balancing the seasonal variations in sun position and intensity.Environmental Considerations
While Sopot's location is generally favorable for solar energy, there are some environmental factors to consider:- Snow accumulation in winter can temporarily reduce panel efficiency
- Occasional fog or mist, especially in autumn and winter, may slightly impact solar output
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 68 locations across Bulgaria. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Bulgaria by location
Solar output per kW of installed solar PV by season in Sopot
Seasonal solar PV output for Latitude: 42.6438, Longitude: 24.753 (Sopot, Bulgaria), 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 Sopot, Bulgaria
To maximize your solar PV system's energy output in Sopot, Bulgaria (Lat/Long 42.6438, 24.753) 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 Sopot, Bulgaria
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 Sopot, Bulgaria. 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 |
|---|---|---|---|
| 27° 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 Sopot, Bulgaria
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 Sopot, Bulgaria.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - 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 Sopot, Bulgaria
The topography around Sopot, Bulgaria, located at coordinates 42.6438°N, 24.753°E, is characterized by diverse and picturesque terrain. This small town is nestled in the northern foothills of the Balkan Mountains, also known as the Stara Planina. The landscape is a mix of rolling hills, steep slopes, and flat valleys, creating a stunning backdrop for the region. To the south of Sopot, the terrain becomes increasingly mountainous as it transitions into the Balkan Mountains. These mountains feature rugged peaks, dense forests, and deep valleys, with some areas reaching elevations of over 2,000 meters above sea level. The famous Troyan Pass, an important route through the mountains, is located not far from Sopot. Northward from Sopot, the landscape gradually flattens out into the southern edge of the Danubian Plain. This area is characterized by gentler slopes and more open terrain, with a mix of agricultural fields, meadows, and scattered woodlands. The transition from mountains to plains creates a varied and visually appealing landscape.
Potential Areas for Large-scale Solar PV
When considering areas nearby that would be most suited to large-scale solar photovoltaic (PV) installations, the northern regions towards the Danubian Plain offer the most promise. These areas have several advantages for solar energy production: Firstly, the flatter terrain of the plains provides more open spaces that can accommodate large solar arrays without the need for extensive land modification. This reduces installation costs and environmental impact. Secondly, the lower elevations and reduced shadowing from mountains in the northern areas ensure longer periods of direct sunlight throughout the day. This is crucial for maximizing solar energy production. Additionally, the agricultural nature of the Danubian Plain means there are likely to be large, contiguous parcels of land available that could be repurposed or dual-purposed for solar energy production without significantly impacting valuable natural habitats. However, it's important to note that any large-scale solar PV project would require detailed site-specific assessments, including solar radiation studies, grid connection feasibility, and environmental impact evaluations. While the northern plains offer good potential, other factors such as local climate conditions, existing infrastructure, and land ownership patterns would also play crucial roles in determining the most suitable locations for solar energy development in the region around Sopot.Bulgaria solar PV Stats as a country
Bulgaria ranks 41st in the world for cumulative solar PV capacity, with 1,186 total MW's of solar PV installed. This means that 4.70% of Bulgaria's total energy as a country comes from solar PV (that's 18th in the world). Each year Bulgaria is generating 171 Watts from solar PV per capita (Bulgaria ranks 31st in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in Bulgaria?
Yes, there are incentives for businesses wanting to install solar energy in Bulgaria. The Bulgarian 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 European Union has provided funding for renewable energy projects in Bulgaria through its Horizon 2020 program.
Do you have more up to date information than this on incentives towards solar PV projects in Bulgaria? Please reach out to us and help us keep this information current. Thanks!
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Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 15th of April 2025
Last Updated: Monday 4th of August 2025
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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.




