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| 12.0 Specifications
Table 13: Battery Backup Times
Number of Batteries
Load
Backup Time (minutes)
S4K4U6000C
S4K6U10KC
Internal b 4 external battery cabinets
30%
158
180
40%
110
120
50%
88
90
60%
72
72
70%
63
65
80%
49
54
90%
45
47
100%
41
39
Using the configuration program, the user may specify the number of external battery cabinets attached to the UPS.
The factory default is programmed for internal batteries only. Table 13 shows the estimated battery backup times at
different loads.
12.1 Auto-learning Battery Backup Times
As batteries age, the estimated backup times may become less accurate. The S4KC is programmed to “learn” from a full
battery discharge and then modify the estimated backup time for the measured battery capacity. This can improve
accuracy and compensate for aging batteries or batteries that operate at different ambient temperatures.
The UPS will update the anticipated backup time calculation only under certain conditions:
•
The UPS must have a steady load that is greater than 20%.
•
The UPS must be at 100% charge at the start of a battery discharge.
•
The battery discharge must continue uninterrupted until the batteries reach their end-of-discharge voltage.
if all conditions are not met, the backup time calculation will not be modified. if the configuration program is used to
change the number of battery cabinets, then the values in Table 13 will be restored. This will override any value that is
auto-learned.
