Alarm Battery Standby Calculator
Add up panel and device quiescent currents to size a backup battery for your required standby time, plus alarm load — with an ageing allowance built in.
Inputs
Standby (quiescent) loads
DevicemA eachQty
Standby & alarm
Results
Required battery capacity
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Total standby current
—
Standby consumption
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Alarm consumption
—
Smallest standard battery
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Capacity = (standby current × standby hours + alarm current × alarm time) × ageing factor. Check your grade and monitoring type against AS/NZS 2201.1 for the standby time required on the job, confirm the panel's charger can recharge the chosen battery in the required time, and derate further for high ambient temperatures. Device standby currents here are typical — always use datasheet figures.