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DEYE BOS-A-PDU-2 control box
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The DEYE BOS-A-PDU-2 is one of the central components of the Deye BOS-A modular energy storage system. As a Power Distribution Unit (PDU), it is responsible for the safe control, communication, and power distribution of high-voltage battery packs.
It is designed specifically for commercial and industrial energy storage systems (C&I ESS) where reliability, accurate battery supervision, and safety functions are critical.
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
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