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SAFSALE ENGINEERING TOOL

Access Control Battery Backup Calculator

Calculate standby battery amp-hours from standby load, alarm/unlock load, required backup hours and a selectable reserve/safety factor.

Required battery capacity—
Amp-hour sizing follows the common standby-load × hours plus alarm/high-load × hours method with an added reserve factor. The selected power supply/charger must support the required battery capacity and recharge requirements.