BYD B-BOX 2.5 - General Introduction of B-Plus 2.5

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5.5 General introduction of B-Plus 2.5
5.5.1 B-Plus 2.5 brief introduction
B-Plus is the commercial name of BYD U3A1-50P-A backup battery with 51.2V& 50Ah which is designed for
energy storage application. B-Plus 2.5 is an integrated battery which consists of shell, BMS and cells.
B-Plus 2.5 overview
Display and communicate interface
Display and communicate interface
No.
Interface
Mark
Function

SOC LED
SOC
Indicate State of capacity of battery

RUN LED
RUN
Indicate the Plus is running status

ERR LED
ERR ADDR
Indicate error status

ALM LED
Alarm
Indicate alarm status

RJ45 terminal
RS485
Communication ports

Address
ADDR
When parallel connection, need setting address.

Alarm relay output
1.2.3.4
Not using

Test terminal
B- B+
Measure battery voltage when testing.

ON/OFF
ON/OFF
Activity battery when no external power add on battery.
⑩
Display and
communicate interface
GND : Grounded terminal
P-: Negative terminal (DC+)
P+: Positive terminal (DC-)
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