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Implementing a NERC Compliant Battery Maintenance Program

William Kaewert

Despite significant investments made by end users in preventive maintenance, non-performing starting batteries remain the number one cause of emergency generator (genset) failure. “Weak or undercharged starting batteries are the most common cause of standby generator system failures.”1 “Over 80% of all starting failures… are due to dead starting batteries.”2 When they do fail, generator batteries frequently fail suddenly, seemingly without warning. In contrast, most of our experience with starting batteries in personal and work vehicles is positive. The rate of failure-to-crank in modern vehicles is extremely low. And, prior to vehicle batteries failing, advance warning is frequently available in the form of observable deterioration in engine crank performance, typically caused by the weakening battery.

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