You must disconnect your battery charger before replacing a battery.
Standby generators use an automatic battery charger. Most owners’ manuals tell you to turn the battery charger off or disconnect it before replacing the battery. The reason is many chargers produce an AC voltage once the battery is disconnected.
This can damage the generator control board causing an expensive repair.
The chargers pictured above are all excellent chargers and are safe to use. These photos are for example only of what a battery charger looks like and not intended to imply that any of the above chargers can create a damaging voltage.
Just remember, the service manual says to always turn your charger off before disconnecting the battery.
Generators and automatic transfer switches as well as their appurtenant devices employ high voltages that can hurt you. Do not attempt to work with this equipment unless you are qualified. Observe all rules and cautions found in the manufacturer’s manuals as well as NFPA 70E, Standard for Electrical Safety in the Workplace.
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