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What kind of backup battery do I need?

Owned by Mihai Peteu (Unlicensed)
Last updated: Mar 27, 2023 by Chad Fay
1 min read

Backup batteries are optional but recommended. Assuming 12VDC, the operating current of a Smart Hub ACU is 1 Amp and a Smart Reader is 0.25 Amp. To power a Smart Hub ACU and four readers, you'd need 2 Amps. And if you're powering locking hardware, you'll need to take that into consideration too. A fully loaded system (ACU, readers, and locking hardware) is about 4 Amps times the number of backup hours needed. To keep the system running for 3 hours with all entries engaged, you’d need a 12V 12Ah sealed lead acid (SLA) or gel cell battery.

Note: For a 24V power supply, you need two 12V SLA or gel cell batteries in series.

Your installer can help you determine the right backup battery for you.