Estimate intrusion alarm backup capacity
Account for the panel, keypads, sensors and communicator during standby, then add the alarm period and your chosen capacity factor. Compare the result to the proposed battery’s amp-hour rating.
Alarm panel battery
Include keypad, communicator, sensors and sounders in the two current values. Enter the backup duration required for the job.
Planning example & assumptions
A battery that meets this arithmetic total may still be unsuitable for the panel or discharge rate. Confirm the panel’s charging and battery limits and the backup duration required for the installation. Extra cellular communicators and accessories should be included in the load.
Common planning questions
Which alarm devices should be included in current draw?
Include the panel, keypads, detectors, communicator and other powered accessories. Use the appropriate documented current in standby and full alarm for the entire connected system.
Why does my panel’s maximum battery size matter?
The charger and enclosure may limit supported batteries even when a larger rating would meet the arithmetic estimate. Confirm the panel instructions and required backup duration before selecting a battery.