JUNXY-380 Battery Monitoring System
JUNXY-380 battery monitoring system is designed specifically for strings of 15 - 48 batteries each, one module for each string. Online monitoring of cell voltage, internal resistance, overall voltage, ambient temperature, charge & discharge current and cell temperature. Runs smoothly under UPS ripple current interference. Easy to install and mounts on battery rack directly.

JUNXY-380 Battery Monitoring System

The JUNXY-380 is designed especially for UPS applications. It is able to provide early warnings of battery problems. The JUNXY-380 checks the health of each battery by continually performing an internal resistance test. In addition, the module indicates immediate battery health and any alarm or error on the local LCD screen or a given computer.

The JUNXY-380 consists of a Main Module and an Extended Module. A Main Module is able to manage up to3 Extended Modules. Each module monitors one string, and a set of BMS monitors up to 4 strings.


--Full resistance, battery temperature and voltage monitoring for comprehensive battery state of health analysis.

--Charge & discharge current, overall voltage and ambient temperature monitoring. 

--Auto detects discharges based on discharge current, and stores data for playback.

--Performs a scheduled resistance test and stores results for trending analysis.

--Displays data on local LCD screen.

--High and low alarm levels may be programmed. 

--Sets off an alarm and the dry contact shuts off when any parameter goes outside the normal range.

--Communicates with a external computer via RS485 and LAN.

--LEDs on front panel indicates status of modules.

--Software compatible with PC is available.

Technical Specifications


JUNXY-380 Battery Monitoring System


Operating temperature: -5℃~50℃,5%~90%RH

Storage temperature: -10℃~70℃,5%~90%RH

For Battery

VRLA and Ni-Cd battery,12V battery, capacity from 1AH to 300AH

Monitor Capacity

Monitors up to 6 strings on one set, up to 48 batteries on each string

Power Requirement



Test load and power paths are fused, reverse polarity and overvoltage protection, voltage cable protection with 2.4K current-limiting resistance 


Range & Accuracy

Overall voltage:20~700V,±(0.3%+0.2V)
Cell voltage:5~15V,±(0.1%+10mV)
Internal resistance:1000~65535uΩ

 Battery temperature


Ambient temperature


Charge & discharge current

0~300A(optional), ±(2%+0.5A)

Communications Interfaces

RS485, Ethernet 10/100 Mbps, meet MODBUS protocol 



Dry Contact

One dry contact,DC220V/1A


Battery rack or 19-inch rack 


Main Module: 3.0KG
Extended Module: 2.3KG

1. BattOnline Software: Receives data from the main module and displays it
2. Temperature Module: Monitors cell temperature
3. Monitor Module: 5.7” LCD with touch screen.

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