The location at Elin Pelin, Sofia, Bulgaria (42.6661, 23.5993) offers varying potential for solar PV energy generation throughout the year. Situated in the Northern Temperate Zone, this site experiences significant seasonal fluctuations in solar output.

Seasonal Solar Performance

Summer stands out as the most productive season, with an impressive 6.97 kWh/day per kW of installed solar capacity. Spring follows as the second-best season, yielding 4.96 kWh/day. Autumn sees a considerable drop to 3.20 kWh/day, while winter performance is notably low at 1.94 kWh/day.

The stark contrast between summer and winter output highlights the location's pronounced seasonality. The period from late spring through early autumn is ideal for solar energy generation, with long days and typically clearer skies contributing to higher yields.

Optimal Panel Installation

For fixed panel installations at this location, the ideal tilt angle to maximize year-round production is 36 degrees facing South. This angle optimizes the balance between summer and winter performance, considering the sun's changing position throughout the year.

Environmental and Weather Considerations

While Elin Pelin's location is generally favorable for solar PV, there are some factors that could impact energy production:

• Snow accumulation in winter months can temporarily reduce panel efficiency.
• Occasional fog or haze, particularly in autumn and winter, may slightly diminish solar irradiance.

To mitigate these issues, consider installing panels at a steeper angle to promote snow sliding off and using self-cleaning glass to reduce dust accumulation. Additionally, regular maintenance and cleaning, especially after snowfall, can help maintain optimal performance.

Overall, while the location experiences significant seasonal variations, proper system design and maintenance can ensure effective year-round solar energy generation, with particularly high yields during the summer months.

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 Elin Pelin

Seasonal solar PV output for Latitude: 42.6661, Longitude: 23.5993 (Elin Pelin, 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 Elin Pelin, Bulgaria

To maximize your solar PV system's energy output in Elin Pelin, Bulgaria (Lat/Long 42.6661, 23.5993) 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 Elin Pelin, 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 Elin Pelin, 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	56° 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 Elin Pelin, 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 Elin Pelin, 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 Elin Pelin, Bulgaria

The area surrounding Elin Pelin, Bulgaria, located at 42.6661 latitude and 23.5993 longitude, is characterized by a diverse topography that includes both flat plains and rolling hills. Situated in the western part of the country, this region is part of the Sofia Valley, which is bordered by the Balkan Mountains to the north and the Vitosha Mountain to the southwest. The immediate vicinity of Elin Pelin consists primarily of gently undulating terrain, with elevations ranging from approximately 550 to 650 meters above sea level. The landscape is dotted with agricultural fields, small forests, and scattered settlements. As one moves further from the town, the terrain becomes more varied, with some areas featuring steeper slopes and more pronounced hills. To the north and northeast of Elin Pelin, the land gradually rises towards the foothills of the Balkan Mountains. This transition zone between the valley and the mountains is marked by increasingly rugged terrain, with deeper valleys and higher elevations. In contrast, the areas to the south and southeast of the town tend to be flatter, with more expansive plains that are well-suited for agriculture.

Potential for Large-Scale Solar PV

When considering areas nearby that would be most suited for large-scale solar photovoltaic (PV) installations, several factors come into play. The ideal locations would combine favorable topography, ample sunlight exposure, and minimal environmental impact. The flat to gently sloping areas to the south and southeast of Elin Pelin present the most promising potential for solar PV development. These regions offer several advantages: Firstly, the relatively level terrain reduces the need for extensive land preparation, making it easier and more cost-effective to install large arrays of solar panels. The absence of significant hills or mountains also minimizes the risk of shading, which could reduce the efficiency of solar installations. Secondly, these southern areas typically receive more direct sunlight throughout the year compared to the northern regions, which may be partially shaded by the Balkan Mountains. This increased solar radiation translates to higher potential energy generation. Lastly, much of this land is already used for agriculture, which means that the environmental impact of converting it to solar farms may be less significant compared to developing forested or ecologically sensitive areas. However, it's important to note that any large-scale solar PV project would require detailed site-specific assessments, including environmental impact studies, grid connection feasibility, and local land use regulations. While the southern plains near Elin Pelin offer good potential, the ultimate suitability of any particular site would depend on a comprehensive evaluation of all relevant factors.

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!

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.