9.6 Battery specification
Table 33: Battery specification
Battery type VRLA, 12 VDC
Battery quantity Default 32 blocks, 192 cells per battery
string
External battery 28–40 blocks, 168–240
cells per battery string
NOTE: Do not connect battery strings with
different battery quantity and voltage in
parallel!
Battery voltage 384 V (32 blocks), 336 V (28 blocks), 480
V (40 blocks)
Recharge profile Constant voltage, constant current charging
(U-I characteristics), ABM or float charge
End of discharge voltage 1.67 VPC to 1.75 VPC, configurable or
automatic (load adaptive)
Charge current Configurable:
8-20 kW units (one UPM) Configurable 0...25 A:
1…25 A with the 20 kW UPM (at > 80% load
limited to 15 A)
1…18 A with the 15 kW UPM (at > 80% load
limited to 10 A)
8-40 kW units (two UPMs) Configurable 0...50 A (at > 80% load
automatically limited to 30 A)
0… 36 A with the 15 kW UPM (at > 80%
load limited to 20 A)
NOTE: The maximum charge current is 25
A per one 20 kW UPM and 18 A per one 15
kW UPM
Battery start option Yes
© Eaton Corporation plc 2020. All rights reserved. Revision: 006 Document ID: P-164000493 117
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Eaton 91PS/93PS UPS 8–40 kW User’s and Installation Guide
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