APC 4x12V Battery Management System AP9930 User Manual

Product codes
AP9930
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USER’S GUIDE
battery management system
1
Using the Battery Management System
Capabilities of the System
The Battery Management System (BMS) does the following:
• Monitors each battery in the system and optimizes the state of its 
charge.
• Identifies failing or failed batteries so that you can replace them before 
they cause damage to other batteries in the same string.
• Extends battery life and ensures that batteries are able to supply 
back-up power on demand.
• Integrates new replacement batteries with older existing batteries.
Capacity
You can use a Battery Management System to manage one or two strings 
of two to four batteries each. The batteries must be six-cell batteries that 
have a nominal 12 VDC. The system can manage batteries that are 
manufactured by different vendors, and show different voltages during 
charging.