B
attery
-Box LV User Manual
Page 8
B-Plus 2.5 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
enclosure, BMS and cells.
B-Plus 2.5 Drawing
①
②
③
④
⑤
⑥
⑦
⑧
⑨
Display and communication interface
No.
Interface
Mark
Function
SOC LED
SOC
Indicate current SOC of battery
RUN LED
RUN
Indicate that the B-plus is in running status
ERR LED
ERR ADDR
Indicate error status
ALM LED
Alarm
Indicate alarm status
RJ45 terminal
RS485
Communication ports
Address
ADDR
Address needs to be set, if they are connected in parallel
.
Alarm relay output
1.2.3.4
N/A
Test terminal
B- B+
Measure battery voltage when testing.
ON/OFF
ON/OFF
Power on/power off manually
5.5 Operating environment
Operating environment parameters
No.
Item
Min.
Typical
Max.
Unit
Remark
1
Discharging temperature
-10
25
50
℃
2
Charging temperature
-10
25
50
℃
3
Relative humidity
5
95
%
4
Absolute humidity
0.26
25
g/m3
⑩
8
7
P-: Positive terminal
P+: Negative terminal
GND: Grounding terminal
