BYD B-Box Series User Manual

B-Box with Sunny Island Commissioning

BYD B-Box Series Specifications

General

Nominal Voltage	51.2 V
Warranty	10 years
Communication	CAN, RS485
Energy Efficiency	≥95%
Battery Type	Lithium Iron Phosphate (LiFePO4)
Operating Temperature	-10°C to 50°C
Scalability	Modular design allows for parallel connection to increase capacity.

Summary

B-Box with Sunny Island Commissioning

Connecting B-Box BMU to Sunny Island

Network Cable Connection

Details connecting the B-Box BMU to inverter and batteries using a network cable.

Connecting B-Box BMU to Battery Modules

BMU to Battery Module Wiring

Illustrates the physical connection path from the B-Box BMU to the battery module.

Comms Cables Connection in One Cabinet

Internal Cabinet Communication Routing

Shows the routing of communication cables within a single B-Box cabinet.

Comms Cables Connection for Master & Slave B-Box

Master/Slave B-Box Communication Setup

Explains cabling between master and slave B-Box units, noting port interchangeability.

Address Setup for 1 Cabinet

Single Cabinet Address Configuration

Details address assignment for BMU and battery modules within a single cabinet.

Address Setup for 2 Cabinets

Two Cabinet Address Configuration

Outlines address setup for a master and slave B-Box system with two cabinets.

Address Setup for 3 Cabinets

Three Cabinet Address Configuration

Details address setup for a master and two slave B-Box systems.

Battery Protection SOC Setup (WIFI Version)

SOC Limits and Generator Query Settings

Configures battery state of charge limits and generator query settings for v12 WIFI.

Battery Protection SOC Setup (No WiFi Version)

Protection and Autostart Settings

Details battery protection SOC and generator autostart settings for v11 (No WiFi).