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Battery Size Calculation Worksheet:
A. FN-1024X-220 internal current consumption (stand-by)
0.05 A
B. Load current consumption
(stand-by)
A
C. Stand-by time required (hours)
H
D. Battery capacity required for standby
(A+B)*C
AH
E. FN-1024X-220 series internal power consumption (Alarm)
0.05 A
F. Load current consumption
(Alarm)
A
G. Alarm duration (Hours; 15 Min = 0.25 Hour)
(Alarm)
H
H. Battery capacity required for Alarm
(E+F)*G
AH
I. Total calculated battery capacity
D+H
AH
J. Battery capacity required
I*1.8 (safety factor)
AH
Note:
FN-1024X-220 power supply is designed to work with batteries up to 65AH. Please note, line [I] must
not exceeds 36AH. You have to reduce either standby current consumption or standby time in order to comply
with requirement.
To determine actual battery size please round line [J] to the nearest larger standard battery size
(e.g. 3.5 AH = 4.0 AH).
