In this context, energy storage is evolving from a technological option into a fundamental prerequisite for the continued integration of renewable energy sources, the maintenance of grid stability, and the containment of electricity prices. Europe is already moving toward a new electricity market model in which flexibility is increasingly valued, while in Greece the energy storage market is transitioning from the planning stage to large-scale deployment.
Energy markets and grid constraints
The economic rationale for energy storage is now based on multiple revenue streams, commonly referred to as revenue stacking. Energy storage systems participate in both energy arbitrage strategies and the provision of ancillary services, such as frequency regulation and system balancing.
However, this new market model is accompanied by significantly greater operational and commercial complexity. The value of a storage investment no longer depends solely on the underlying technology, but also on its ability to optimize operations in an environment characterized by volatile electricity prices and continuously evolving market conditions.
In Greece, the rapid penetration of renewable energy sources (RES) has placed new pressures on the power system. Grid constraints, network congestion in certain regions, and increasing renewable energy curtailments have highlighted the growing need for large-scale flexibility solutions.
Energy storage serves as a critical tool for relieving pressure on the electricity system, enabling more efficient use of existing grid infrastructure while reducing the loss of renewable energy that would otherwise be curtailed.
The Greek energy storage market is entering a pivotal phase of development, with total installed capacity expected to approach 800 MW by 2027, as dozens of projects are already at advanced stages of implementation.
This momentum reflects a structural transformation of the energy system: as renewable generation continues to expand, the limitations of a grid originally designed for a very different operating environment become increasingly apparent.
In this context, energy storage has already become a strategic priority for all major energy groups in Greece, with projects ranging from standalone battery energy storage systems (BESS) to installations that rank among the largest in Europe.
The role of energy management in commercial and technical performance
The transition from planning to operation brings to the forefront a factor that until recently remained in the background: the management of the energy storage facility. A modern storage plant is a dynamic system that must make real-time decisions: when and at what rate to charge or discharge, which markets to participate in, how to respond to system operator instructions, and how to manage equipment degradation.
The management of this operational complexity is carried out through the Energy Management System (EMS), which serves as the central control and optimization mechanism for the operation of every modern energy storage facility or hybrid system.
In an environment characterized by tight technical constraints, strict regulatory requirements, and increasing cybersecurity demands, the quality of the EMS directly affects both the financial performance and the overall sustainability of the investment.
The technological dimension and the role of PROTASIS
In this highly demanding environment, PROTASIS has systematically invested in the development of integrated solutions for monitoring, protection, automation, and supervision of power systems, fully aligned with international standards and technical specifications.
This expertise now enables the company to participate in the implementation of some of the largest storage and hybrid energy projects being developed in the country, undertaking the engineering, design, development, and commissioning of advanced Energy Management Systems (EMS).
Looking ahead, it is becoming increasingly clear that the energy transition will not be determined only by how much energy is produced, but by how effectively that energy can be managed by the system. In this context, expertise in critical control and energy management systems is expected to play a decisive role.
The article has been published at the Greek Energy edition of energypress.gr, July 2026.
