AFP-3030 Installation Manual — P/N DOC-01-037:B 25/08/2016 38Calculating the Battery Requirements Electrical SpecificationsA.7 Calculating the Battery RequirementsA.7.1 Battery Power EquationsA.7.2 Recommended Standby Battery SizesWhen selecting and installing batteries, ensure that there is enough available current to charge thebatteries while in quiescent mode. A list of available batteries and the minimum charging currentrequired is shown in Table A.5, “Recommended Battery Specifications”.For a remotely connected system:Ah = (I Q x 24) + IAFor a non-remotely-connected system:Ah = (I Q x 72) + IAWhere:Ah = The minimum rated battery capacityI Q = the non-alarm current from that battery (charger off) in ampsI A = the alarm current drawn from the battery (charger off) in ampsNOTE: A times 2 de-rating factor has been applied to the Alarm Capacity to compensate forbattery conversion inefficiencies.NOTE: Connect only sealed lead acid batteries.Battery Description Voltage Capacity (Ah) MinimumCharging Current (A) QuantityOlympic, 12 AH 12 V Battery -BATT/12 (CJ12-12)12 12 0.55 2Olympic, 18 AH 12 V Battery -BATT/18 (CJ12-18)12 18 0.83 2Olympic, 26 AH 12 V Battery -BATT/26 (CJ12-26)12 26 1.19 2Olympic, 33 AH 12 V Battery -BATT/33 (CJ12-33)12 33 1.51 2Olympic 40 AH 12 V Battery -BATT/40 (CJ12-40)12 40 1.83 2Olympic 85 AH 12 V Battery -BATT/85 (CJ12-85)12 85 3.89 2Table A.5 Recommended Battery Specifications