How long does it take to fully charge a battery after is has been used extensively?
It depends on the size of the battery and the sump pump system that is doing the charging. The Big Dog system has a powerful 20-amp charger that will charge a discharged battery in approximately 6 hours. The chargers on the Basement Watchdog Special and Emergency systems are less powerful trickle chargers, and they will take several days to recharge a battery. You could take the battery to a service station for a quicker charge, or hook the battery up to an automotive charger if you have one. Be sure to disconnect the control unit from the battery if you are using an automotive charger. If you don’t the control unit may be damaged and the warranty voided.
