Installation Guide

M220 Series Installation Guide - 13 -
AL1024M220 Battery Size Calculation Worksheet.
A. AL1024M220 internal current consumption (stand-by) 0.13A
B. Load current consumption (stand-by) A
C. Stand-by time required (hours) H
D. Battery capacity required for stand-by (A+B)*C AH
E. AL1024M220 internal power consumption (Alarm) 0.13A
F. Load current consumption (Alarm) A
G. Alarm duration (Alarm) H
(Hours, example: 15 Min = 0.25 Hour)
H. Battery capacity required for Alarm (E+F)*G AH0
I. Total calculated battery capacity D+H AH
J. Battery capacity required I*1.8 (safety factor) AH
Note: AL1024M220 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.