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3.8 Battery Connection
The UPS uses a positive and negative double battery structure, totaling 20 pieces in series. A
neutral cable is derived from the connection between the cathode of the 10th and the anode of
the 11th batteries. The neutral, positive and negative cables are connected to the UPS
respectively. The batteries between the battery anode and the neutral are called positive batteries
and those between neutral and the battery cathode are called negative batteries. The capacity
and numbers of batteries is user selectable.
External battery connections for long-runtime units are as follows:
Note:
The BAT+ is connected to the anode of the positive battery, the BAT-N is connected to
the cathode of the positive battery and the anode of the negative battery, the BAT- is
connected to the cathode of the negative battery.
The factory default setting for the long backup time unit is for sixteen (16) 12V batteries with a
capacity of 65Ah (with a charger current of 9.75A). When connecting 18/20/22/24 batteries,
re-set the battery quantity and capacity after the UPS starts up in AC mode. The charger
current can be adjusted automatically according to the battery capacity selected. All related
settings can be done via the LCD panel or monitoring software.
CAUTION!
Ensure the correct polarity of the batteries in series connection.
Positive to negative at the terminals. Do NOT mix batteries of
differing capacities, brands, or age (old with new).
WARNING!
Ensure correct polarity of connections to the Battery Circuit Breaker
and from the Battery Circuit Breaker to the UPS terminals i.e. (+) to
(+) / (-) to (-). Disconnect one or more battery cell links in each tier
and do NOT reconnect these links or close the battery circuit breaker
until all the connections have been inspected and verified.