Monitoring of Energy Legislation September 2026

See the most important news in the field of Slovak energy legislation for the month of September 2026.

Several legislative proposals have been submitted for public consultation, including a new government regulation on vulnerable electricity and gas customers, an amendment to the decree on emergency measures in the electricity and gas sectors, and an amendment to the decree governing the method of verifying the economic efficiency of the operation of the heating facilities system.

The President of the Slovak Republic has also signed an amendment to the Act on energy efficiency of buildings, introducing new rules for zero-emission buildings, energy certification, and building renovation.

As of 1 September 2026, OKTE has been applying a new Operation Order and has also launched an information system for transport credits.

SEPS updated selected technical conditions, conducted public consultations on its documents, and launched procurement procedures for ancillary services for 2027. RONI determined new system service tariffs for SEPS for the period from 1 October 2026 to 31 December 2026.

At P&P, we focused on repowering issues and alerted renewable energy producers to the approaching deadline for investing economically justified costs.

Read more about these and many other interesting news in our monitoring for the month of September 2026, which you can also download in PDF format.

We wish you a pleasant reading!

1.    WHAT HAS CHANGED?

Note: In our monitoring of energy legislation, we monitor for you the changes to the above-mentioned legal regulations, which were published in the Collection of Laws of the Slovak Republic last month.

2.    YOU MIGHT BE INTERESTED

2.1     LEGISLATION IN THE ENERGY SECTOR

■       New Rules for Vulnerable Energy Consumers

17 September 2026 – A draft government regulation has been submitted for consultation procedure that redefines the categories of vulnerable electricity and gas consumers.

The proposal includes households, small consumers, social service facilities, child protection and social guardianship institutions, selected apartment buildings, homeowners’ associations, and groups of apartment owners ensuring heat production and domestic hot water heating. For electricity, the proposed annual consumption threshold for small consumers is 30,000 kWh and for gas, 100,000 kWh.

The proposal follows the recent amendment to the Energy Act and is expected to enter into force in November 2026, while certain new categories of vulnerable electricity consumers would be subject to the special regime only from 1 January 2027.

You can find the proposed government regulation and the accompanying documentation HERE. (Available only in the Slovak language version.)

■       Amendment to the Decree on Emergency Measures in the Electricity and Gas Sectors

18 September 2026 – An amendment to the decree on emergency situations in the electricity and gas sectors (No. 416/2012 Coll.) was submitted for consultation procedure.

The most significant change is the introduction of the possibility of planned interruption of electricity generation in the event of significant electricity surpluses in the system, particularly from renewable energy sources connected to distribution systems, where such surpluses cannot be compensated by standard system operation tools.

The proposed effective date is 1 January 2027.

More information about the proposed decree, as well as the accompanying documentation, can be found HERE. (Available only in the Slovak language version.)

■       Changes to the Rules for the Heating Sector

22 September 2026 – An amendment to the decree on verification of the economic efficiency of operation of heating facilities system (No. 328/2005 Coll.) was submitted to the interdepartmental consultation procedure.

The objective of the proposal is mainly to update the rules for verifying the efficiency of heat production and heat distribution in light of the development of new technologies in the heating sector. The amendment supplements energy-efficiency indicators and verification procedures for electric boilers and heat pumps, further specifies the method and scope of verification of the efficiency of thermal systems, and updates normative indicators of heat consumption.

The proposed effective date is 1 January 2027.

More information about the legislative process, as well as the accompanying documentation and the draft decree itself, can be found HERE. (Available only in the Slovak language version.)

■       President Signed the Amendment to the Act on energy efficiency of buildings

29 September 2026 – The President of the Slovak Republic signed the amendment to the Act on energy efficiency of buildings (No. 555/2005 Coll.). Among the most significant changes are the introduction of the zero-emission building standard, new requirements regarding building renovation and the use of renewable energy sources, the introduction of a building renovation passport, expansion of energy certification, and new rules for electromobility, smart buildings and indoor environmental quality monitoring.

The amendment becomes effective on 1 January 2027.

More information about the legislative process can be found HERE. (Available only in the Slovak language version.)

2.2    REGULATORY OFFICE FOR NETWORK INDUSTRIES (RONI)

■       RONI to Tighten Oversight of Environmental Claims in the Energy Sector

9 September 2026 – RONI announced that, following the introduction of new consumer protection rules, it will strengthen its oversight of environmental marketing claims used by energy suppliers. Particular attention will be paid to labels such as “green electricity” and “green energy”.

You can read more HERE. (Available only in the Slovak language version.)

■       RONI Presented Priorities of the New Regulatory Policy

21 September 2026 – RONI presented the main objectives of the upcoming regulatory policy for 2028 - 2032. Priorities are expected to include stable energy prices, security of supply, modernization of energy networks, support for flexibility and energy storage, industrial competitiveness, and a more targeted approach to addressing energy poverty.

You can read more about the objectives in RONI’s press release. (Available only in the Slovak language version.)

■       RONI Published a New Form for District Heating Companies

23 September 2026 – RONI published the form entitled “Investičné náklady INav INad GO” (Investment Costs INav INad GO), which serves as a basis for reporting investment costs in the heating sector.

The form is available on the RONI website. (Available only in the Slovak language version.)

■       Water Utilities Continue to Grow and Invest

30 September 2026 – RONI published an analysis of the financial performance of water utility companies for 2025, according to which the sector continues to develop steadily despite rising costs. Revenues from regulated activities increased year-on-year by 6.9% in drinking water supply and by 8.1% in wastewater collection and treatment, while water utility companies also increased spending on repairs and infrastructure renewal. Water utility companies achieved an overall positive financial result of EUR 31.2 million from regulated activities.

You can read more at this link. (Available only in the Slovak language version.)

2.3    SHORT-TERM ELECTRICITY MARKET OPERATOR (OKTE)

■       OKTE: New Operating Order Entered into Force

1 September 2026 – The new Operating Order, approved by RONI Decision No. 0012/2026/E-PP of 18 August 2026, entered into force on 1 September 2026.

The main changes include the introduction of a credit system for demonstrating compliance with reference values when placing transport fuels on the market, as well as the establishment of rules for their registration and administration within the OKTE system. At the same time, it will apply that a guarantee of origin may not be issued for electricity for which a credit has been issued, thereby preventing the double counting of environmental attributes.

The current version of the Operating Order can be found HERE. (Available only in the Slovak language version.)

■       OKTE Launched an Information System for Transport Credits

1 September 2026 – OKTE launched a new information system (IS KES) designed for the issuance, registration, transfer and use of transport credits in accordance with the requirements of the RED III Directive. The system is intended to support compliance with obligations in the field of transport decarbonisation.

More information is available in OKTE’s announcement as well as in the newly created Transport Credits section on the OKTE website. (Available only in the Slovak language version.)

■       OKTE Consulted Further Amendments to the Operating Order

September 2026 – A public consultation was held regarding another amendment to the Operating Order. The proposed modifications mainly concerned the provision of data between OKTE and market participants.

More information, including the evaluation of comments and the updated wording of the Operating Order (only in the Slovak language version) following the public consultation, is available on the OKTE website.

2.4   SLOVAK ELECTRICITY TRANSMISSION SYSTEM (SEPS)

■       SEPS Updated Technical Conditions and Consulted Amendments to Its Documents

September 2026 – SEPS informed about approved amendments to selected documents governing the Technical Conditions of Access and Connection and the Rules for the Operation of the Transmission System.

At the same time, public consultations were held during September regarding amendments to the Operating Rules and Document B of the Technical Conditions. The proposed modifications primarily respond to the development of aggregation, the introduction of flexible connection, and the need to align transmission system operation rules with practical experience and European legislation.

More information regarding the Technical Conditions is available at this link and HERE. (Available only in the Slovak language version.)

More information regarding the amendments to the Operating Rules is available on the SEPS website. (Available only in the Slovak language version.)

■       SEPS Launched Procurement of Ancillary Services for 2027

1 September 2026 – SEPS published tender documentation for the selection procedure for the medium-term procurement of ancillary services for 2027 and simultaneously launched the qualification phase of the procurement process for the first half of 2027.

More information is available HERE, and the procurement documentation is available at this link. (Available only in the Slovak language version.)

■       RONI Determined New System Service Tariffs

30 September 2026 – SEPS informed about the publication of RONI Decision No. 0417/2026/E, which determined system service tariffs for the period from 1 October 2026 to 31 December 2026.

Details regarding the determined tariffs are contained in the published RONI decision available at this link. (Available only in the Slovak language version.)

2.5    THE OTHERS

■      P&P: RES Repowering – What Producers Must Complete by the End of 2026

2 September 2026 – In our article, we alerted renewable electricity producers who entered the regime of extended feed-in-premium support (so-called repowering or support prolongation) to the approaching deadline for investing approved economically justified costs.

In the vast majority of cases, these investments must be completed and evidenced no later than 31 December 2026. Otherwise, there may be a risk of having to return part of the support to the support settlement administrator. The article also addresses RONI requirements relating to the substantiation of costs, including expert opinions, and highlights the regulatory and financial risks associated with non-compliance with the conditions of extended support.

Our article can be found HERE. (Available only in the Slovak language version.)

■      SIEA Published New Conditions of the Green Households project

21 September 2026 – SIEA presented new conditions for the Green Households project. The most significant change is the transition from a voucher scheme to direct payment of contributions to households and the introduction of a queue-based system with continuous assessment of applications. The purpose of these changes is to simplify administration and accelerate the provision of support for renewable energy installations.

You can read more at this link.

■       SPP Will Have a Record Volume of Gas Available for the Winter Season

22 September 2026 – SPP announced that it will secure 17.5 TWh of natural gas in storage facilities for the 2026/2027 winter season. The target level is expected to be achieved already during the first half of October 2026. According to SPP, when fully filled, Slovak underground gas storage facilities can cover approximately 70% to 75% of Slovakia’s annual natural gas consumption.

You can read more in the news item published on the SPP website. (Available only in the Slovak language version.)

■       Regional Distribution Companies Consulted Amendments to Their Operating Rules

September 2026 – Západoslovenská distribučná, a.s. (ZSD), Stredoslovenská distribučná, a.s. (SSD), and Východoslovenská distribučná, a.s. (VSD) conducted public consultations regarding proposed amendments to their operating rules. The proposed changes primarily follow amendments to the Energy Act and electricity market rules.

The wording of ZSD’s Operating Rules following the public consultation is available HERE. (Available only in the Slovak language version.)

The revised draft wording of SSD’s Operating Rules following the public consultation is available HERE. (Available only in the Slovak language version.)

Details regarding the proposed amendments and the consultation process relating to VSD’s Operating Rules are published on the VSD website after user login. More information is available HERE. (Available only in the Slovak language version.)

You can download the monitoring for the month of September 2026 in PDF format here.

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Legal notice

The information provided to the subscriber as part of the monitoring of energy legislation is not a source of legally binding legislation, as only the collection of laws of the Slovak Republic contains the legally binding wording of the legislation in terms of the legal code of the Slovak Republic. The information provided to the subscriber is only informative and does not replace legal service pursuant to the Act no. 586/2003 Coll. on advocacy. The law firm POLÁČEK & PARTNERS s.r.o. is not responsible for the completeness and accuracy of the information provided in the energy legislation monitoring. In case of questions regarding the information provided to the subscriber, the subscriber can ask the law firm POLÁČEK & PARTNERS s.r.o. for the provision of legal services for this purpose.