BYD B-Box H Installation Guidance

2 / 23 Contents SAFETY ...................................................................................................................................................................................................................................................... 3 1 PRODUCT OVERVIEW ......................................................................................................................................................................................................................... 4 2 BCU INTRODUCTION ........................................................................................................................................................................................................................... 6 3DESCRIPTION OF B-PLUS-H INTERFACE AND TERMINAL ........................................................................................................................................................... 8 4B-BOX H INVERTER CONFIGURATION LIST ................................................................................................................................................................................... 9 4.1B-BOX H CONFIGURATION LIST WITH SMA SUNNY ISLAND –ON GRID ........................................................................................................................................................... 9 4.2B-BOX H CONFIGURATION LIST WITH KOSTAL–ON GRID ............................................................................................................................................................................. 9 5PREPARATORY WORK ........................................................................................................................................................................................................................ 10 5.1INSTALLATION INSTRUCTIONS ........................................................................................................................................................................................................................ 10 5.2 PACKING INFORMATION AND SYSTEM STRUCTURE CONFIGURATION LIST ..................................................................................................................................................... 11 5.3STRUCTURE CONFIGURATION LIST ................................................................................................................................................................................................................. 11 5.4 INSTALLATION TOOLS .................................................................................................................................................................................................................................... 12 5.5 PERSONAL PROTECTION EQUIPMENT ............................................................................................................................................................................................................. 12 6INSTALLATION OF SINGLE CABINET ............................................................................................................................................................................................. 13 7CONNECTION WITH THE INVERTER .............................................................................................................................................................................................. 16 8SYSTEM BOOT ...................................................................................................................................................................................................................................... 19 8.1OPEN THE AIR SWITCH OF BATTERY ............................................................................................................................................................................................................... 19 8.2 SET THE BCU ................................................................................................................................................................................................................................................ 19 8.3OPEN THE INVERTER ...................................................................................................................................................................................................................................... 23 8.4OPEN THE AIR SWITCH OF BATTERY, AND THE SYSTEM CAN WORK NORMALLY ................................................................................................................................................ 23 9SYSTEM SHUTDOWN .......................................................................................................................................................................................................................... 23 Website of installation video: http://www.byd.com/energy/b-box-25.htm

3 / 23 Safety Warning: When dismantling the system, avoid touching the battery terminal with the metal objects or human body. The work relating to electrical connections of the system shall be done by competent persons. All operations of B-Box H relating to electrical connection must be done by professionals. During operation of B-Box H according to the predesigned mode, it provides a safe power source. Improper operation, damage, incorrect use and abuse of the product might cause potential danger (for example, overheating or electrolytic mist). Please comply with the following safety precautions and warning information. If you don’t fully understand any one of the following preventive measures or have any doubt, please contact our customer service staff. Installation and maintenance workers must operate according to the applicable federal, state and local regulations and industry standards of B-Box H. Installation workers may not wear metal jewelry, etc. in order to avoid short circuit and personal injury. Warning: During loading, unloading and handling of the product, be cautious, and avoid accidents of product damage and personal injury due to the falling of product. To add battery, first disconnect the power supply of the battery and other power input.

4 / 23 1 Product Overview B-Box H is the abbreviation of high-voltage battery box, with the operating voltage range within 200~500V. It is applied in the household energy storage field and works together with high-voltage inverter to realize energy storage and release. Each set of batteries of the system supports the serial connection of 5~9 battery modules, and parallel connection of 1~5 sets of batteries.

6 / 23 2 BCU Introduction The battery management and control part, which contains BCU and charge-discharge relay, is connected to the battery modules underneath and to inverter or BMU above. Position Designation A Inverter communication interface B P-interface C P+ interface D Ground interface E Ethernet interface E A D C B

7 / 23 Definition of BCU Functional Interfaces No. Interface Name Description 1 P+ The system anode, connected to the anode of battery interface of inverter. 2 P- The system cathode, connected to the cathode of battery interface of inverter. 3 GND Grounding terminal, connected to the ground. 4 Ethernet Connected to the Ethernet, to complete the functions of communication and remote program update. 5 Inverter communication Contain RS485, CAN, and enable signals, outputting 13V power. 6 System switch The main switch of system, which can be operated manually and has short circuit protection function. Position Designation A Air switch waterproof cover B System switch A B

8 / 23 3Description of B-Plus-H Interface and Terminal The battery module provides energy and sends the information about the cell voltage and cell temperature in the battery module to the upper-layer BCU. Pluggable terminal on the battery Side-lock, used to lock the upper and lower batteries.

9 / 23 4B-Box H Inverter Configuration List 4.1B-Box H Configuration List with SMA Sunny Island –On Grid 1 Phase on Grid Inverter Type B-Plus-H BCU Sunny Boy STORAGE 2.5 5-9 1 4.2B-Box H Configuration List with KOSTAL–On Grid 3 Phase on Grid Inverter Type B-Plus-H BCU PIKO 6.0 BA 5-9 1

10 / 23 5Preparatory Work 5.1Installation Instructions a) Before installation, ensure that BCU manual switch is in disconnected state. b) The battery shall be installed in a place away from heat source and avoid sparks. The safety distance is greater than 0.5m. c) The connecting cables for installing batteries shall be as short as possible, to prevent too big voltage drop of the line d) Batteries of different capacity, different P/N or from different manufacturers cannot be connected. e) After installation, ensure the anode and cathode of BCU and inverter are connected correctly. f) The installation place shall be on a horizontal ground, without accumulated water.

11 / 23 5.2 Packing Information and System Structure Configuration List The battery, BCU+ base are packed in separate carton. Before installation, the installation persons shall read the system configuration list. No. Item Description Qty Purpose Picture 1 Installation Manual 1 Provide guidance for field installation. \ 2 User Manual 1 System information and using method and Warranty items. \ 5.3Structure Configuration List Type H5 H6 H7 H8 H9 BCU+base 1 1 1 1 1 B-Plus-H 5 6 7 8 9 User manual 1 1 1 1 1 Installation Manual 1 1 1 1 1

12 / 23 5.4 Installation Tools Cross screwdriver M3~M10 Flat tip screwdriver M3~M6 Crimping pliers Diagonal cutters Adjustable wrench Inner hexagon spanner 5.5 Personal Protection Equipment

13 / 23 6Installation of Single Cabinet First step: open the battery package; Pearl wool Battery Plastic bag Pearl wool Carton

14 / 23 Second step: Take outthe battery, base and BCU from the packing box (the method is the same as the first step); Battery Base BCU

15 / 23 Third step: Install the batteries (5pcs~9pcs), and lock the batteries with the base; then install BCU, and lock the batteries with BCU; the installation is over. Battery Base Stack up the assembled batteries according to the actual quantity required, and lock the side lock tightly. Side lock hole Finally, install the BCU, lock the side lock, and the installationis finished. Side lock

16 / 23 7Connection with the Inverter Tools: Cross screwdriver, with even tightening torque: 25±2.5Nm. Connection with the power line: Get the anode and cathode lines through the PG head, connect them into BCU case, and then install them onto the anode and cathode terminals respectively. Connection with the communication line and Ethernet cable: Open the upper cover of BCU, and connect the communication line. The definition of communication line is as follows: (Remarks: Pin 1 and 3 are 13V output, and can supply power for the inverter, or supply power to the upper BMU module when multiple sets of the products are connected in parallel. Pin 2 and 4are for receiving inverter enable signal interface. Connect to the Ethernet interface with a network cable, and lead it out through PG head.) Pin Definition 1 13V+ 2 EN 11V+ 3 13V- 4 EN 11V- 5 RS485A 6 CANH 7 RS485B 8 CANL

18 / 23 No. Interface Name Description 1 P+ The system anode, connected to the battery interface anode of inverter. 2 P- The system cathode, connected to the battery interface cathode of inverter. 3 GND Grounding terminal, connected to the ground. 4 Ethernet Connected to the Ethernet, to complete the functions of communication and remote program update. 5 Inverter communication Contain RS485, CAN, and EN enable signals, outputting 13V power.

19 / 23 8System Boot Note: Before activating the system, please inspect the following items: Confirm the inverter is not connected reversely; Ensure reliable connection of communication line between battery and inverter. 8.1Open the Air Switch of Battery 8.2 Set the BCU I. Log in Enter correct IP address in the browser (IE, Google Chrome or Mozilla Firebox browsers are recommended), and then enter the account number and password to log in (the login ID: installer; password: installer). Log in the WEB interface by selecting one of the following ways: 1. WIFI: First, connect the computer to the system’s WIFI (name: BYD+ product serial number (for example: BYD100171708-00001), password: 123456789); then enter the IP:192.168.5.1 in the browser, and enter the account number and password to log in. 2. LAN: Connect the battery system and the computer in the same LAN through router, get the system’s IP address on the router web page, then enter the system’s IP address or its host name (e.g. BYD100171708-00001) in the browser, and enter the account number and password to log in. 3. Direct connection with network cable: Directly connect the computer to the network interface of battery system with the network cable, set the computer’s IP address to put the computer and the system on the same network segment, enter the IP: 192.168.6.1 in the browser, and enter the account number and password to log in. The interface after successful login is shown below:

21 / 23 II. View and Set User Information Click on the “User Information” menu in the left list to view the system’s user information (e.g. the server IP, the geographic location, the number of system groups, the quantity of batteries of one group of system, etc.). First set related parameters, such as the quantity of batteries, the model of matching inverter, etc., click on “Apply” button to reset the user information, and after that, the system will be restarted automatically. Click on “Cancel” button, and the original user information will be displayed.

22 / 23 After clicking on “Apply” button, the system will set the parameters automatically, and please wait patiently, and ensure the system will not be powered off; otherwise, the setting might fail. After setting, the following interface will appear on the webpage: Note: After setting, the system will be restarted automatically.

23 / 23 8.3Open the Inverter 8.4Open the air switch of battery, and the system can work normally 9System Shutdown Note: Please power off the inverter before shutting down the system. After the system is shut down, check the following items: The inverter is powered off. The battery system switch is closed.