Solar PV Analysis of Celje, Slovenia
Celje, Slovenia, has the potential to generate a decent amount of electricity from solar power year-round. The amount of energy you can get from solar panels depends on the season. In summer, you could expect about 6.55 kilowatt-hours (kWh) of electricity per day for each kilowatt (kW) of solar panels installed. This drops in autumn to about 3.02 kWh/day per kW, and even further in winter to around 1.84 kWh/day per kW - this is because there's less sunlight in these seasons compared to summer. However, it rises again in spring to about 4.66 kWh/day per kW.
To get the most out of your solar panels year-round at this location, you should tilt them at an angle of 39 degrees facing south - this will allow them to catch as much sunlight as possible over the course of a year.
However, there might be some local factors that could affect how much energy your solar panels can produce here:
- Weather: Slovenia is known for its diverse climate with relatively high rainfall and cloudy days especially during autumn and winter which may reduce the amount of sunlight reaching your panels.
- Topography: Celje is located in a valley surrounded by mountains which might cast shadows on your panels depending on their location.
- Environmental: If there are tall buildings or trees nearby they could also cast shadows reducing sun exposure.
To ensure greater energy production despite these factors:
- Install your system where it will have clear access to sunlight most part of the day.
- Regularly clean and maintain your system so that dirt or debris doesn't block sunlight.
- Consider using tracking systems that move with the sun throughout day ensuring maximum exposure.
So while Celje isn't necessarily an 'ideal' location for generating solar power due its weather conditions and topography; it still has potential if managed correctly!
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 60 locations across Slovenia. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in Slovenia by location
Solar output per kW of installed solar PV by season in Celje
Seasonal solar PV output for Latitude: 46.2286, Longitude: 15.2577 (Celje, Slovenia), 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 39° South in Celje, Slovenia
To maximize your solar PV system's energy output in Celje, Slovenia (Lat/Long 46.2286, 15.2577) throughout the year, you should tilt your panels at an angle of 39° 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 Celje, Slovenia
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 Celje, Slovenia. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 39° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 30° South in Summer | 49° South in Autumn | 60° South in Winter | 39° 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 Celje, Slovenia
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 Celje, Slovenia.
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 Celje, Slovenia
Celje, Slovenia is situated in the Savinja Valley, surrounded by mountain ranges such as the Kamnik-Savinja Alps to the north and west. The area features a mix of flatland, rolling hills and steep slopes with elevations ranging from 234m to 925m.
The topography around Celje is quite diverse with a combination of valleys, plains and hilly terrains. This can present both opportunities and challenges for large-scale solar PV installations.
Flat areas or gentle slopes facing south are typically ideal for solar PV installations as they receive maximum sunlight exposure. The plains around Celje could potentially be suitable for such installations. However, it's important to note that factors other than topography also play a significant role in determining suitability for solar power generation including local climate (sunlight hours), land use restrictions, proximity to power grids etc.
Additionally, rooftops in urban areas like Celje city could also offer potential sites for smaller scale distributed solar PV systems.
For more precise assessment of most suited areas nearby Celje for large-scale Solar PV projects, detailed site-specific studies involving Geographic Information System (GIS) analysis would need to be conducted considering all these factors.
Slovenia solar PV Stats as a country
Slovenia ranks 60th in the world for cumulative solar PV capacity, with 367 total MW's of solar PV installed. Each year Slovenia is generating 175 Watts from solar PV per capita (Slovenia ranks 28th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in Slovenia?
Yes, there are incentives for businesses wanting to install solar energy in Slovenia. The Slovenian government offers a range 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 number of programs to promote the use of renewable energy sources such as solar power.
Do you have more up to date information than this on incentives towards solar PV projects in Slovenia? Please reach out to us and help us keep this information current. Thanks!
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Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Tuesday 27th of February 2024
Last Updated: Monday 21st of July 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.
