All-in-One Energy Storage System
is a DC-coupled battery energy storage system for new and legacy PV plants
The system combines a 261 kWh lithium battery cabinet, bidirectional DC/DC control, BMS, intelligent EMS coordination, fire protection, thermal management, and SCADA connectivity into a practical DC-side storage solution. It is designed to improve solar self-consumption, recover curtailed PV energy, and add storage to existing PV plants.
261 kWh battery + bidirectional DC/DC module
Why Galaxy 261L DC-Coupled ?
The Galaxy 261L DC-Coupled Energy Storage System features an intelligent fire protection system, combining smoke-temperature detection, aerosol fire suppression, and audible-visual alarm functions for early warning and rapid response. Compact, fast-acting, and low-maintenance, this safety architecture helps ensure stable operation of the battery system in both new-build and retrofit PV applications.
The Galaxy 261L DC-Coupled Energy Storage System integrates FFD POWER's proprietary ANY PORT SCADA platform to coordinate the EMS, BMS, DC/DC controller, and site-level interfaces through a unified communication architecture. This enables reliable local control, remote monitoring, and flexible operating logic for PV charging, battery dispatch, and system protection. Meanwhile, the Siemens PLC ensures local safety interlocks and control logic remain fully functional and secure. This architecture guarantees both fast external responsiveness and robust local reliability.
Galaxy 261L DC-Coupled Energy Storage System is optimized for cost-effective and flexible deployment, featuring an all-in-one design that integrates the EMS, PCS, and BMS into a compact, high-integration system. Its smaller footprint and low space requirements make it ideal for sites with limited installation space, while ensuring more flexible and convenient operation. Transportation efficiency is maximized—a single 40-foot HQ container can hold up to 10 units—significantly reducing logistics costs and simplifying project rollout.
The key value of Galaxy 261L DC-Coupled lies in its retrofit-friendly architecture. A bidirectional DC/DC controller is installed on the input side of the existing PV inverter, so the battery can be integrated without replacing approved inverter assets. Because the final AC output still remains within the original inverter envelope, the project can often avoid the extra permitting, utility review, or new grid-connection workflow that may be triggered by adding a separate AC-side PCS. At the same time, the system helps recover curtailed solar energy, increase self-consumption, and shift surplus PV generation to higher-value periods.
System Parameter
Main system parameter with different options
261 KWh ，Comprised of 5 liquid-cooled battery packs
CE
IEC 62619
IEC 63056
UL 9540A
UN 38.3
MSDS
DC-Coupling to a PV inverter
CE
IEC 62109
IEC 50549
VDE 4105
VDE 4110
VDE 4120
Control communication protocol : Modbus TCP/IP , IEC 61850
ISO 27001
Download Center
Every document you need is here
Manual
Grid-compliant SLDs, cabling diagrams, foundation drawings
Layout
Tailored parts list to match site voltage, PV systems, and PCS type
BOM & Component Matching
Structured knowledge transfer to customer team
Primary System Diagram
Grid-compliant SLDs, cabling diagrams, foundation drawings
Secondary Circuit Diagram
Tailored parts list to match site voltage, PV systems, and PCS type
Installation Guide
Structured knowledge transfer to customer team
Anti Fire Instruction
Grid-compliant SLDs, cabling diagrams, foundation drawings
Certificate
Tailored parts list to match site voltage, PV systems, and PCS type