Sunsynk 5-Way Battery Cabinet with BMS and 4 x 5.12kWh High Voltage Batteries

This fully loaded Sunsynk battery storage system consists of a 5 Way Battery Cabinet, a mandatory integrated high-voltage BMS, and four 5.12kWh lithium iron phosphate (LiFePO₄) battery modules. It is designed for indoor energy storage applications where a compact, secure, and professionally managed high-voltage battery system is required.

The 5 Way Battery Cabinet is engineered to accommodate a maximum of four high-voltage battery modules, with the BMS required for correct system operation, protection, and communication. The cabinet provides a robust steel enclosure with lockable access and integrated ventilation, ensuring safe and stable operating conditions for the battery system.

The integrated Sunsynk high-voltage BMS manages system control, battery protection, and communication, enabling seamless compatibility with Sunsynk high-voltage hybrid inverters. CAN and RS485 interfaces allow coordinated charge and discharge control, monitoring, and diagnostics within the Sunsynk ecosystem.

Each battery module delivers 5.12kWh of nominal energy using LiFePO₄ chemistry, offering long cycle life, thermal stability, and operational safety. With four modules installed, the system provides a total nominal energy capacity of 20.48kWh, suitable for backup power, energy storage, peak shaving, and time-of-use optimisation where supported by the inverter configuration.

This solution is intended for indoor installation and is supplied as a complete cabinet-based battery system with mandatory BMS and fixed maximum capacity.

Authorised retailer of Sunsynk.

Specification

Battery System

• Battery chemistry: Lithium Iron Phosphate (LiFePO₄)
• Number of battery modules: 4 (maximum supported)
• Energy per module: 5.12kWh
• Total nominal system energy: 20.48kWh
• Module nominal voltage: 51.2V
• Module capacity: 100Ah
• Recommended depth of discharge: 90%
• Cycle life: ≥6000 cycles (25°C, 0.5C/0.5C)
• Communication interfaces: CAN / RS485
• IP rating (battery system): IP20

Battery Management System (BMS)

• Product type: High-voltage battery management system
• Function: System control and protection for HV battery stacks
• Maximum system voltage: Up to 700V
• Rated current: 100A
• Communication interfaces: CAN2.0, RS485
• Status indicators: System power on, system alarm
• Installation type: Rack-mounted
• Enclosure IP rating: IP20
• Operating temperature (charge): 0°C to +55°C
• Operating temperature (discharge): -20°C to +55°C
• Storage temperature: 0°C to +35°C
• Humidity range: 5% to 85% RH
• Maximum installation altitude: ≤2000m
• Certification: CE, IEC62619, VDE2510-50, UL1973, UN38.3

Cabinet

• Cabinet type: 5 Way Indoor Battery Cabinet
• Maximum battery capacity: 4 × 5.12kWh modules
• Material: 1.2mm mild steel
• Finish: Powder coated black
• Locking mechanism: Lockable lift & turn compression latch
• Cabinet assembled dimensions (H × W × D): 1005 × 585 × 920 mm
• Ventilation: Dual fan with adjustable bimetal thermostat
• Temperature control preset: 25°C
• Adjustable feet: 0–25 mm
• IP rating (cabinet): IP20