Bilecik, Turkey shows considerable seasonal variation in its solar energy generation potential, making it a moderately suitable location for year-round solar PV installations. Located in the Northern Temperate Zone, this region experiences the typical seasonal fluctuations common to temperate climates.
Seasonal Solar Performance
Summer represents the peak solar generation period at Bilecik, with panels producing 7.31kWh per day per kW of installed capacity. This high output makes summer the most productive season for solar energy harvesting. Spring follows as the second-best performing season, generating 5.26kWh per day per kW, offering substantial energy production as daylight hours increase and solar angles improve. Autumn sees a notable decline in solar output to 3.73kWh per day per kW as the sun's angle decreases and weather patterns shift. Winter presents the most challenging conditions for solar generation, with output dropping significantly to just 2.10kWh per day per kW of installed capacity.Optimal Panel Configuration
For maximum year-round energy production at Bilecik, solar panels should be installed at a fixed tilt angle of 34 degrees facing south. This angle has been calculated to optimize total annual solar output by accounting for the sun's varying elevation throughout the year and weighting for daily solar potential based on irradiance data.Local Environmental Factors
Several environmental and weather factors in the Bilecik region could potentially impact solar energy production:- Snow accumulation during winter months can block panels and significantly reduce energy output
- Dust and particulate matter from agricultural activities and regional winds can coat panel surfaces
- Morning fog and mist, common in temperate continental climates, can reduce early-day solar collection
- Occasional hail storms during transitional seasons may pose physical risks to panel integrity
Preventative Installation Measures
To maximize solar energy production despite these challenges, several installation strategies should be considered. Installing panels at the recommended 34-degree tilt angle naturally helps with snow shedding and reduces accumulation during winter months. Regular cleaning schedules, particularly during dusty agricultural seasons, will maintain optimal panel efficiency. Selecting panels with anti-reflective coatings and robust tempered glass can improve performance during misty conditions and provide better protection against hail damage. Proper drainage around panel installations prevents water pooling that could lead to increased humidity and potential electrical issues. Installing monitoring systems allows for quick identification of performance drops due to environmental factors, enabling prompt maintenance responses. Additionally, choosing mounting systems with adequate ventilation helps prevent moisture buildup and maintains optimal operating temperatures throughout the varying seasonal conditions typical of Bilecik's temperate climate.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 165 locations across Turkey. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Turkey by location
Solar output per kW of installed solar PV by season in Bilecik
Seasonal solar PV output for Latitude: 40.1405, Longitude: 29.9876 (Bilecik, Turkey), 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 34° South in Bilecik, Turkey
To maximize your solar PV system's energy output in Bilecik, Turkey (Lat/Long 40.1405, 29.9876) throughout the year, you should tilt your panels at an angle of 34° 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 Bilecik, Turkey
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 Bilecik, Turkey. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 34° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 24° South in Summer | 44° South in Autumn | 55° South in Winter | 32° 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 Bilecik, Turkey
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 Bilecik, Turkey.
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 Bilecik, Turkey
Topographical Features Around Bilecik
Bilecik sits in the northwestern region of Turkey, positioned within the transitional zone between the Marmara region and Central Anatolia. The city is nestled in a valley surrounded by rolling hills and moderate elevation changes that characterize much of this part of Turkey. The terrain around Bilecik features a mix of gentle slopes, small valleys, and undulating countryside typical of the Turkish highlands.
The landscape is dominated by sedimentary rock formations and weathered hills that rise gradually from the valley floors. These hills generally range from 400 to 800 meters in elevation, creating a moderately mountainous environment without extreme peaks or deep gorges. The topography includes numerous small streams and seasonal watercourses that have carved shallow valleys through the landscape over millennia.
Agricultural land covers much of the region, with fields and pastures spread across the gentler slopes and valley bottoms. The area experiences a continental climate with distinct seasons, supporting both crop cultivation and grazing activities. Forested areas are scattered throughout the higher elevations, primarily consisting of deciduous and mixed woodland species adapted to the regional climate conditions.
Optimal Areas for Large-Scale Solar Development
The most suitable locations for extensive solar photovoltaic installations around Bilecik would be the broad, gently sloping hillsides that face south and southwest. These areas offer the ideal combination of consistent solar exposure and manageable terrain for large-scale construction and maintenance activities. The moderate slopes provide natural drainage while avoiding the shading issues that would occur in deeper valleys or on north-facing hillsides.
The elevated plateaus and ridge areas southeast and southwest of the city center present particularly attractive opportunities for solar development. These locations benefit from minimal obstruction from surrounding terrain and reduced atmospheric interference due to their elevation. The relatively stable geology of these areas, composed primarily of consolidated sedimentary formations, would provide solid foundations for solar panel mounting systems.
Areas currently used for extensive agriculture, particularly those with marginal soil quality or challenging farming conditions, could potentially be converted to solar use with appropriate planning and community engagement. The open character of much of the agricultural land means that large solar arrays could be installed with minimal clearing or terrain modification required.
The transportation infrastructure in the region, including existing roads and proximity to transmission lines, would support the development of solar facilities in areas within reasonable distance of Bilecik. The relatively gentle topography throughout much of the surrounding countryside means that access roads and electrical connections could be established without excessive engineering challenges or environmental disruption.
Turkey solar PV Stats as a country
Turkey ranks 16th in the world for cumulative solar PV capacity, with 7,817 total MW's of solar PV installed. This means that 5.90% of Turkey's total energy as a country comes from solar PV (that's 14th in the world). Each year Turkey is generating 92 Watts from solar PV per capita (Turkey ranks 41st in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in Turkey?
Yes, there are incentives for businesses wanting to install solar energy in Turkey. The Turkish government offers a number of financial incentives and tax breaks for businesses that invest in renewable energy sources such as solar power. These include grants, loans, and tax credits. Additionally, the government has set up a feed-in tariff system which guarantees a certain price per kilowatt hour of electricity generated from solar panels. This helps to make investing in solar energy more attractive to businesses.
Do you have more up to date information than this on incentives towards solar PV projects in Turkey? Please reach out to us and help us keep this information current. Thanks!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Wednesday 30th of July 2025
Last Updated: Friday 8th 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.




