Deye BOS-A High-Voltage Battery Cluster Control Box

The Deye BOS-A Cluster Control Box is the central high-voltage management and protection unit designed
specifically for Deye BOS-A lithium battery systems. It is a critical control component that enables
multiple high-voltage battery modules to operate safely as a single coordinated energy storage
system.

This unit is not a battery and it does not store energy. Instead, it manages, protects, and
coordinates high-voltage battery racks, acting as the control and safety interface between the
battery cluster and compatible inverters or power conversion systems.

Role of the BOS-A Cluster Control Box in High-Voltage Systems

In high-voltage battery systems, multiple battery modules are connected in series to reach the
required system voltage and in parallel to increase capacity. The BOS-A Cluster Control Box
supervises this entire battery cluster by monitoring voltage, current, temperature, and operating
status across all connected battery modules.

It ensures that charging and discharging occurs within safe limits, coordinates system protection,
and provides controlled power output to the inverter or PCS. Without a dedicated cluster control
unit, high-voltage battery systems cannot operate safely or reliably.

High Current Capability and System Scalability

The BOS-A control box is designed to support high current output, with a recommended operating
current of 100A and a maximum current capability of up to 160A. This allows the battery system to
support higher-power inverters and larger load demands in commercial and industrial installations.

A single BOS-A system can support large battery capacities and is compatible with high-power hybrid
or PCS-based inverter systems. The system architecture allows multiple high-voltage battery racks to
be combined, enabling scalable storage solutions for larger energy requirements.

Dual Power Output and Redundant Connection Design

The control box features a dual power output design, allowing connection to two separate DC battery
interfaces on compatible inverters or power conversion systems. Each individual power output
connector supports up to 100A, enabling balanced current distribution and improved system
flexibility.

A dual-electrode disconnection design is implemented for enhanced safety, allowing the battery
system to be electrically isolated when required for maintenance or fault conditions.

Integrated Monitoring, Display, and Wireless Access

A built-in data display provides clear system status information, including high-voltage operation
state and fault indicators. This simplifies initial commissioning, system checks, and fault
diagnosis during installation and maintenance.

The BOS-A control box also supports Bluetooth connectivity via a mobile application, allowing
installers and technicians to access detailed system data wirelessly during setup and service.

Protection and Safety Functions

The control box incorporates multiple layers of protection required for safe high-voltage battery
operation, including:

• Over-voltage and under-voltage protection
• Over-current protection
• Over-temperature protection
• Short-circuit protection
• System fault detection and alarm indication

These protections help safeguard the battery modules, inverter, and connected equipment while
maintaining stable system operation.

Typical Applications

The Deye BOS-A Cluster Control Box is designed for use in:

• Commercial and industrial solar energy storage systems
• High-capacity residential hybrid battery installations
• Utility-scale battery backup and energy shifting systems
• Grid-interactive and off-grid high-voltage battery configurations

It is intended exclusively for use with Deye BOS-A high-voltage lithium battery systems and must be
installed by professionals experienced with high-voltage energy storage equipment.

Technical Specifications – Deye BOS-A Cluster Control Box

General

• Product type: High-voltage battery cluster control box
• Compatible battery system: Deye BOS-A
• Installation type: Rack-mounted system

Electrical

• Recommended charge/discharge current: 100 A
• Maximum charge/discharge current: 160 A
• DC auxiliary power supply: 12 V DC

High-Voltage System Configuration

• Supported battery module quantities per rack: 7, 13, or 21 modules
• System nominal voltage options: 268.8 V / 499.2 V / 806.4 V
• System operating voltage range: Up to approximately 920 V DC

Communication

• Communication protocol: CAN2.0
• Additional interfaces: Ethernet (LAN), RS485
• Wireless access: Bluetooth (mobile app support)

Environmental

• Operating temperature: 0°C to +55°C (charge), -20°C to +55°C (discharge)
• Humidity range: 5% to 85% RH
• Maximum installation altitude: ≤3000 m
• Ingress protection rating: IP20 (indoor installation)

Physical

• Enclosure material: Metal cabinet
• Dimensions: System-dependent based on rack configuration
• Approximate system weight: 558 kg to 1586 kg (depending on configuration)