Generator Battery

Q: Would there be any issue with Joint Commission compliance with using maintenance-free batteries supported by the manufacturer of our generators? The weekly testing would be resistance readings in lieu of acidic based testing that we perform now.

A: There should not be any problem with any authority accepting the use of maintenance-free batteries for the start function on the generator. With the adoption of the 2012 Life Safety Code in 2016, it now references NFPA 110-2010, which allows for batteries other than wet-cell type for starting generators. See section 8.3.7, which says:

8.3.7 Storage batteries, including electrolyte levels or battery voltage, used in connection with systems shall be inspected weekly and maintained in full compliance with manufacturer’s specifications.

8.3.7.1 Maintenance of lead-acid batteries shall include the monthly testing and recording of electrolyte specific gravity. Battery conductance testing shall be permitted in lieu of the testing of specific gravity when applicable or warranted.

So, sealed lead-acid batteries are permitted. They are required to be inspected weekly but tested with an appropriate battery conductance tester monthly. This is not a simple continuity test of the battery, as it requires the use of a special conductance tester. Conductance is a measurement of the plate surface available in the battery, which determines how much power (or current) the battery can supply. As a battery ages the plate surface can sulfate, or it can shed active material. In addition, conductance can detect cell defects, shorts, and open circuits.

Follow the instructions provided by the manufacturer of the battery conductance tester.