EVN Elektrani installed an impressive battery system at FEC Probishtip

EVN Supply: What is the main objective of the project to install a battery system in Elektrani?

Stojchevski: The objective of installing a battery system in EVN Elektrani is to respond to the latest developments in the power systems and energy markets and by that to achieve:

• Better financial result from the produced energy and possibility to store the energy produced during the hours when the price on the market is very low, i.e. zero, and sell it later during the hours when the price is highest;
• Additional income from nominating "Flexible Energy" as a system service to the transmission system operator
• Relief of the distribution system during periods of high electricity production from concentrated photovoltaic power plants connected to the main distribution substations.

EVN Supply: How does this project fit into the broader energy strategy of the EVN Group?

Stojchevski: Currently, EVN elektrani owns and operates the largest “Battery” within the EVN Group, with a total capacity of 20 MWh and an installed power of 10 MW. In parallel, the development and implementation of larger systems is taking place in EVN Austria (70MW/140MWh) as well as in EVN Bulgaria, which indicates that optimizing the use of electricity through storage is a response to the energy opportunities in the entire EVN Group.
 
EVN Supply: Why are batteries particularly relevant right now on the Macedonian energy market?

Stojchevski: The Macedonian energy market is facing difficult circumstances caused by:

• The large number of photovoltaic power plants built in a relatively short period of time, which produce more electricity than consumers need
• Additional expenses for electricity export to EU member states, due to the CBAM introduced from 01.01.2026

According to the above circumstances, electricity producers and prosumers are increasingly considering implementing a solution for flexible use of electricity, which is offered precisely by battery energy storage systems (BESS).



EVN Supply: What are the biggest challenges for implementing such systems in our country?

Stojchevski: There are technical, legal and financial challenges for implementation of BESS:

• Finding a suitable location with network opportunities that allow connection of the BESS
• Performing technical connection - integration of the BESS with the existing power plant, in terms of using the connection to the distribution network, medium voltage transformation and adaptation of existing substations
• Adhering to the procedures for obtaining appropriate approvals and documentation in accordance with the latest amendments to the Energy Law: 
  • Adoption in the Аnnual plan for electrical energy facilities (Ministry of Energy)
  • Obtaining authorization for the construction of energy facilities (Ministry of Energy)
• Finding an appropriate placement of the produced electricity by concluding an appropriate buyout agreement
• Timely procurement of equipment due to changes in product prices and complications in the method of delivery, in accordance with recent developments in the world.

EVN Supply: How do you see the role of batteries in the energy system in Macedonia in the next 5–10 years?

Stojchevski: The role of BESS in the next 5-10 years will be crucial. BESS are the simplest and fastest solution for implementation in order to respond to all current challenges. These devices are suitable for use for a period of up to 10 years, in accordance with today's technological development, which ensures their reliable operation and guaranteed performance during that time period.


 
EVN Supply: What would you say to companies considering investing in batteries?

Stojchevski: The first who will implement BESS will have the opportunity for fastest return on investment. Of course, this is conditioned by the manner of using BESS and an appropriate electricity buyout agreement, i.e. the need for:

• Appropriate electricity buyout agreement with a stable energy supplier who has an appropriate energy portfolio management system (EPM – Energy Portfolio Management)
• Appropriate battery management system (EMS – Energy Management System)
• Successful integration between the two systems for maximum income and with fair distribution between the two legal entities

Investing in BESS does not bring a quick return on investment, but it brings long-term energy stability, lower operational uncertainties and reduced risk in case of negative changes in energy systems and energy markets.