Saint Vlas, Burgas, Bulgaria shows moderate potential for year-round solar energy generation, though with significant seasonal variations typical of its Northern Temperate Zone location at coordinates 42.7167°N, 27.7667°E.

Seasonal Solar Performance

The location demonstrates strong summer performance at 6.99 kWh per day per kW of installed solar capacity, making it an excellent time for solar energy generation. Spring also offers good production levels at 5.15 kWh per day per kW, providing a solid shoulder season for energy output. However, the location faces challenges during colder months. Autumn production drops to 3.02 kWh per day per kW, while winter sees the lowest output at just 1.92 kWh per day per kW. This represents more than a three-fold difference between peak summer and winter production. For optimal year-round energy capture at Saint Vlas, Burgas, solar panels should be installed at a fixed tilt angle of 36 degrees facing south. This angle maximizes total annual production by balancing the sun's varying position throughout the seasons.

Local Factors Affecting Solar Production

Several environmental and weather factors in Saint Vlas could impact solar panel performance: Coastal Salt Air: Being located near the Black Sea coast, salt-laden air can accumulate on panel surfaces, reducing light transmission and energy output. Regular cleaning schedules and anti-corrosive panel frames help mitigate this issue. Winter Snow and Ice: The low winter production figures suggest potential snow coverage during colder months. Installing panels at the recommended 36-degree angle helps snow slide off naturally, while heating elements or manual clearing may be necessary during heavy snowfall periods. Seasonal Weather Patterns: The dramatic drop in autumn and winter production indicates frequent cloud cover and shorter days typical of temperate coastal climates. While this cannot be prevented, proper system sizing should account for these seasonal variations. Humidity and Condensation: Coastal locations often experience high humidity, which can cause condensation on panels and reduce efficiency. Adequate ventilation spacing behind panels and quality mounting systems help address moisture-related issues. To maximize energy production, installers should use marine-grade mounting hardware, ensure proper drainage, and design systems with easy access for maintenance and cleaning.

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 Saint Vlas

Seasonal solar PV output for Latitude: 42.7167, Longitude: 27.7667 (Saint Vlas, 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 Saint Vlas, Bulgaria

To maximize your solar PV system's energy output in Saint Vlas, Bulgaria (Lat/Long 42.7167, 27.7667) 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 Saint Vlas, 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 Saint Vlas, 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 Saint Vlas, 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 Saint Vlas, Bulgaria.

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 Saint Vlas, Bulgaria

Topographical Features of Saint Vlas

Saint Vlas sits along Bulgaria's Black Sea coastline in a transitional zone where the eastern slopes of the Stara Planina mountain range meet the sea. The town occupies a gently sloping terrain that rises gradually from the sandy beaches and coastal plain toward the foothills of the Balkan Mountains. This positioning creates a natural amphitheater effect, with the settlement nestled between the maritime lowlands and the ascending mountainous terrain. The immediate coastal area features relatively flat topography with sandy beaches and low-lying areas that extend inland for several kilometers. As the landscape moves westward from the shoreline, it begins to undulate with rolling hills and gentle slopes that become progressively steeper as they approach the mountain foothills. The elevation changes are generally gradual rather than abrupt, creating a series of terraced landscapes that have historically been used for agriculture and development. The region's drainage patterns are influenced by several small rivers and seasonal streams that flow eastward from the mountains toward the Black Sea. These waterways have carved shallow valleys and created areas of flatter terrain interspersed with the generally sloping topography. The soil composition varies from sandy coastal deposits near the sea to more clay-rich soils in the interior areas.

Optimal Areas for Large-Scale Solar Development

The most promising locations for extensive solar photovoltaic installations lie in the inland areas west and southwest of Saint Vlas, where the topography transitions from coastal plains to gentle hillsides. These zones offer several advantages including relatively stable ground conditions, good drainage, and sufficient space for large arrays while remaining accessible for construction and maintenance activities. The rolling hills approximately five to fifteen kilometers inland from the coast present ideal conditions for solar development. These areas feature moderate slopes that can be effectively utilized for solar panel positioning while avoiding the steepest terrain closer to the mountain foothills. The elevation provides natural drainage benefits and reduces concerns about flooding or waterlogging that might affect coastal installations. Agricultural lands in the broader Burgas Province surrounding Saint Vlas also represent significant opportunities for solar development. Many of these areas feature relatively flat to gently sloping terrain that has been previously cleared and leveled for farming activities. The existing infrastructure, including access roads and electrical connections serving rural communities, could potentially support large-scale solar installations with appropriate modifications and upgrades. The plateau areas and broad valleys between the coastal zone and the steeper mountain slopes offer particularly attractive sites for utility-scale solar projects. These locations typically provide the necessary land area for extensive installations while maintaining reasonable construction costs due to their accessible terrain and moderate grading requirements.

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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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.