Key message

In Slovenia, final users have at their disposal only around 73% of primary energy. In 2015 the rate reached its highest level. The efficiency of electricity and heat production is largely influenced by this share in far.

The indicator Energy losses in energy conversion and transfer distributes the energy consumption in Slovenia (primary energy) to losses in electricity and heat production (dependent on the production efficiency = consumed energy (fuels) – produced energy (electricity, heat, oil products)), to losses in transfer and distribution, to consumption in the energy sector (in SORS data, this includes the categories Own consumption and Energy sector) and to final energy consumption (non-energy and energy consumption).

Furthermore, the indicator shows the impact of individual fuels on CO2 emissions.

The indicator can be shown in relative (share of individual fuels in total energy consumption) or absolute units. For the indication in absolute units, the thousand tonnes of oil equivalent (ktoe) is used.


Figure EN26-1: The share of energy losses and final consumption in primary energy consumption in Slovenia, 2000–2015
Show data
Final energy consumption Loss in grids Consumption in transformation and in energy sector Loss in transformation
2000 71.51 1.47 1.48 25.53
2001 70.30 1.27 1.48 26.95
2002 69.12 1.28 1.47 28.13
2003 71.03 1.57 1.49 25.91
2004 71.10 1.51 1.50 25.89
2005 70.63 1.69 1.44 26.24
2006 71.26 1.51 1.49 25.74
2007 70.47 1.53 1.50 26.50
2008 70.94 1.32 1.46 26.27
2009 70.59 1.51 1.56 26.34
2010 71.03 1.66 1.56 25.75
2011 69.85 1.45 1.52 27.18
2012 71.05 1.56 1.59 25.80
2013 71.31 1.54 1.59 25.55
2014 70.53 1.54 1.59 26.34
2015 72.86 1.58 1.55 24.01
Figure EN26-2: Distribution of energy supply to end-use energy sectors and losses in conversion and transmission, 2015
Show data
Transformation losses Consumption in transformation and energy sector Distribution losses Non energy consumptino Industry Transport Households Other sectors
Share in gross inland consumption 19.69 1.27 1.30 18.57 15.48 22.70 14.02 6.97
Figure EN26-3: Emission factors for CO2 for different fuels
Show data
Emission factors CO2
Solid fuels 101.78
Oil products 74.04
Natural gas 55.29
Renewable sources 0
Waste 73.30
Figure EN26-4: Share of fuels in consumption of thermal power plants and emissions of thermal power plants, 2015
Show data
Waste Renewable sources Natural gas Oil products Solid fuels
Shares of individual fuels in consumption of thermal power plants 0.35 5.70 7.16 0.61 86.18
Shares of individual fuels in emissions from thermal power plants 0.28 0 4.28 0.49 94.95


- decrease of energy losses in conversion and transfer;
- improvement of efficiency of energy consumption and decrease of the impact of consumption on the environment.


Data methodology for this indicator

The calculation of individual contributions:
- Losses in conversion: The consumption of fuels in electricity and heat production from energy balance and in refineries (transformation-total) – electricity and heat production and the production of oil derivatives (transformation total).
- Own consumption in electricity and heat production (electricity – difference between gross production and net production, heat – joint questionnaire).
- Energy consumption in the energy sector (Energy balance of SORS – Energy sector).

The annual growth for the indicator is sometimes shown in percentage points. A percentage point is a unit used for the comparison of different rates of growth. A percentage point includes an absolute comparison calculated by the formula (nthis year)-(nlast year)=16 %–15 %=1 pp (for instance: if last year the growth was 15 % and this year 16 %, then this year the growth was higher by 1 percentage point). The difference in growth can also be expressed in a relative comparison using the formula [(nthis year/nlast year)*100]–100=[(16 %/15 %)*100]–100=6.7 %, where the growth is indicated in percentages.

Source data base
Agricultural Institute of Slovenia
Date of data source summarization
Time coverage
Geographical coverage
Information about the quality of this indicator

- Advantages and disadvantages of the indicator: The source of the basic information is one institution (SORS, EUROSTAT) for the entire time series. This provides a more qualitative analysis of events in the considered period.
- Relevance, accuracy, robustness, uncertainty:
Reliability of the indicator (archive data): The data have the same reliability as the balance of energy consumption – see indicator Final energy consumption by sectors.
Uncertainty of the indicator (scenarios/projections): Scenarios and projections are not available.
- Overall assessment (1 = no major comments, 2 = data to be considered with reservation):
Relevance: 1
Accuracy: 1
Completeness over time: 1
Completeness over space: 1

Other sources and literature

- EEA, 2012. Energy efficiency in transformation (ENER 011)

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