60 Enjoypowers EPCS105-AM PCS units support fast-response ancillary services in a 10 kV grid-connected battery energy storage project in Korsør, Denmark.
Project Overview
Located in Korsør, Denmark, this 6.3 MW / 6.99 MWh battery energy storage system is designed for participation in the Danish ancillary services market.
The project was jointly delivered by Enjoypowers and Renepoly and is connected to the local 10 kV medium-voltage grid.
At the core of the system are 30 standardized liquid-cooled battery cabinets. Each cabinet integrates CATL 280 Ah LFP battery cells and two Enjoypowers EPCS105-AM power conversion systems, bringing the total installation to 60 PCS units.
System-level coordination is handled by Renepoly’s Energy Management System, which manages battery operation, PCS control, grid interaction and external dispatch commands.
| Project Information | Details |
|---|---|
| Location | Korsør, Denmark |
| System Capacity | 6.3 MW / 6.99 MWh |
| Application | Ancillary Services / Frequency Regulation |
| Grid Connection | 10 kV Medium Voltage |
| Battery Cabinets | 30 Liquid-Cooled Cabinets |
| Battery Cells | CATL 280 Ah LFP |
| PCS | Enjoypowers EPCS105-AM |
| PCS Quantity | 60 Units |
| EMS | Renepoly EMS |
| Ancillary Services | FCR, aFRR and mFRR |
| End-to-End Response | 500 ms from VPP dispatch signal to full PCS power output |
Supporting Denmark’s Ancillary Services Market
Frequency regulation places particularly demanding requirements on battery energy storage systems.
Unlike conventional peak-shaving applications, an ancillary-service BESS must continuously receive and execute external power commands while maintaining accurate and stable power control.
Fast response is only one part of the requirement.
The PCS, EMS and communication architecture must also work together reliably to support frequent charge and discharge commands, multi-unit coordination and interaction with third-party dispatch platforms.
For this project, the system is designed to support participation in FCR, aFRR and mFRR ancillary services.
The Enjoypowers EPCS105-AM has completed the required Danish grid certification and market registration, providing the compliance foundation for the project to participate in these applications.
Standardized PCS Architecture
The project uses 30 standardized liquid-cooled battery cabinets, with two EPCS105-AM PCS units integrated into each cabinet.
This modular architecture allows the power conversion system to be distributed across multiple battery cabinets rather than relying on a single centralized converter.
For a multi-megawatt energy storage project, this architecture provides a practical basis for standardized system design, flexible capacity expansion and coordinated multi-PCS operation.
At transformer level, advanced PCS control algorithms allow ten PCS units to operate in parallel behind a single transformer.
Stable parallel operation is particularly important in this type of system. When multiple power converters operate on the same AC bus, control interaction between units must be carefully managed.
The control strategy of the EPCS105-AM enables coordinated parallel operation without resonance or circulating current, supporting stable system performance under continuous power regulation.
500 ms End-to-End Response
One of the most important performance indicators for this project is system response speed.
Field operation demonstrates an end-to-end response time of approximately 500 milliseconds — from receipt of the VPP dispatch signal to full PCS power output.
This distinction is important.
The 500 ms figure represents the response of the complete control chain rather than only the internal response time of the PCS.
The process includes the external VPP dispatch command, local EMS processing, PCS command execution and the final power response at the converter output.
For frequency regulation and other ancillary-service applications, this system-level response capability enables the BESS to react rapidly to grid and market dispatch requirements.
Open EMS and VPP Integration
Energy storage projects operating in electricity and ancillary-service markets often need to interface with different EMS, aggregators and Virtual Power Plant platforms.
For this reason, a flexible communication architecture is an important part of the overall solution.
In the Korsør project, Renepoly’s local EMS coordinates the battery system and Enjoypowers PCS while connecting with the external dispatch platform.
The open control architecture of the EPCS105-AM allows the PCS to integrate with third-party EMS and VPP platforms, giving system integrators greater flexibility when adapting the solution to different market structures and control requirements.
This approach also separates the power conversion layer from the market-dispatch layer.
The PCS focuses on accurate and reliable power conversion, while the EMS and VPP platform manage system-level optimization and market participation.
Designed for Utility-Scale Energy Storage Applications
The Denmark project demonstrates how standardized PCS modules can be deployed in a multi-megawatt battery energy storage system while maintaining fast response and stable parallel operation.
From individual battery cabinets to transformer-level PCS clusters and finally the 10 kV grid connection, the system combines standardized hardware with coordinated control.
The project highlights several capabilities that are particularly important for European ancillary-service applications:
fast system-level power response, stable multi-PCS parallel operation, certified grid connection capability, and flexible integration with third-party EMS and VPP platforms.
Together, these capabilities allow the battery storage system to respond effectively to external dispatch commands while maintaining reliable operation across a large number of PCS units.
Watch the Project Video
See the 6.3 MW / 6.99 MWh battery energy storage project in Korsør, Denmark, and learn how Enjoypowers PCS supports fast-response frequency regulation applications.
YouTube Video:
About the EPCS105-AM
The Enjoypowers EPCS105-AM is designed for commercial, industrial and utility-scale battery energy storage applications.
Its modular architecture and multi-unit parallel capability make it suitable for applications ranging from conventional grid-connected energy storage to projects requiring frequent and rapid power regulation.
In the Denmark project, 60 EPCS105-AM units form the power conversion layer of the 6.3 MW energy storage system, working together with the local EMS and external VPP dispatch platform.
Related Product: Enjoypowers EPCS105-AM Energy Storage PCS
Building Flexible Energy Storage Systems for Global Markets
Ancillary-service projects require more than individual high-performance components.
Successful deployment depends on the coordination of the battery system, PCS, EMS, grid connection and external dispatch platform.
Through cooperation with partners such as Renepoly, Enjoypowers provides certified PCS technology, flexible control interfaces and standardized power conversion solutions for battery energy storage projects in Europe and other global markets.
For system integrators, EPCs and energy storage developers planning grid-connected BESS, frequency regulation or microgrid projects, Enjoypowers can provide PCS products and technical support for system architecture, parallel operation and EMS integration.
Planning an energy storage project?
Contact Enjoypowers to discuss PCS selection, system configuration and integration requirements for your next BESS project.
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