DEYE BOS-A-PDU-2 control box

Key technical specifications

• Operating voltage: 200 – 1000 V DC
• Max charge/discharge current: 160 A
• Auxiliary power supply: 12 V ±2% / 4.15 A
• Operating temperature: -20°C to +65°C
• Ingress protection: IP20
• Dimensions (W × H × D): 632 × 572 × 142.2 mm
• Weight: 21 kg
• Cooling type: Natural ventilation
• Installation: Rack-mounted (integrated into the BOS-A system)

Connections & interfaces

The BOS-A-PDU-2 provides multiple communication and control ports for integrated operation with inverters, batteries, and communication modules:

• Isolating Switch: Manual switch to isolate the battery rack from external systems
• USB Port: For BMS firmware updates and data backup
• COMM1 / COMM2: Battery-to-inverter communication with power supply
• PCS COM: Communication with the inverter (PCS) for battery data transfer
• IN COM / OUT COM: Communication daisy-chain between multiple PDU units
• Bluetooth: Local data communication via mobile app (BMS monitoring)
• Ethernet (spare): Reserved for future network data communication
• Display Screen: Displays battery status (SOC, voltage, fault codes)
• START (Internal): Start switch for the internal 12VDC circuit
• HV Light Indicator (yellow): Indicates the presence of high voltage
• ALRM Light Indicator (red): Indicates battery fault or system malfunction
• PCS1+ / PCS2+ (orange): Positive connection points for inverter 1 and inverter 2
• PCS1- / PCS2- (black): Negative connection points for inverter 1 and inverter 2
• B+ / B-: Battery connection terminals – positive (red), negative (black)

Functional features

• Automatic battery supervision: Communicates with the BMS, balances cell voltages, and optimizes charge/discharge processes
• Multi-layer protection: Overvoltage, overcurrent, short-circuit, overtemperature, and reverse polarity protection
• Integrated diagnostics: Real-time status reporting and fault indication via LEDs and display
• Dual PCS interface: Supports simultaneous DC connection for two inverters
• Bluetooth support: Quick system checks and fault monitoring via mobile application
• Modular system support: Integrates with 7–21 BOS-A batteries in a single series string
• Rack integration: Compatible with BOS-A Rack 11 / Rack 14 / Rack 16 cabinets

Safety features

• High-voltage indicator LED (HV)
• System fault LED (ALRM)
• Manual isolator switch
• IP20 protection in enclosed rack design
• Compliance: CE / IEC 62619 and UN38.3

Applications

• Small and medium-sized commercial solar energy storage systems (C&I)
• Battery control unit for Deye SUN-50K / SUN-80K / SUN-100K hybrid inverters
• Modular BOS-A energy storage systems
• Off-grid and hybrid systems with integrated communication and protection

Key benefits

• High-voltage battery compatibility (up to 1000 V)
• Dual PCS communication—supports two inverters from one unit
• Intelligent BMS integration with automatic data transfer
• Safe, IP20, rack-compatible design
• Modular, scalable energy storage architecture