Voltage on battery backup for sump pump11/7/2023 ![]() ![]() It should now be between 12.3 and 13.2 volts. Next, unplug the battery charger and wait a few minutes. If it’s below that, you may have a trickle charger problem. When the battery’s trickle charger is plugged in, the voltage should be around 13.5 volts on a standard 12 volt battery. You can do this using a multimeter or voltmeter. Check the floating voltage between the positive and negative terminals of the battery. Try resetting the circuit breaker or use a different outlet.Ĭhecking battery voltage. Inspect the battery’s trickle charger, the electrical outlet, fuse, and circuit breaker to ensure nothing is wrong with the power source. ![]() In some cases, the battery is fine, but isn’t receiving enough power to properly recharge. Either of these problems can trigger a false alarm, so check this first.Ģ. Make sure the battery terminals aren’t corroded and the wire connections are secure. There are a couple steps you can take to confirm your battery no longer holds a charge before you replace it with a new battery (or with the more reliable Water Commander ™ system).ġ. If the battery has low power levels, this will trigger the alarm. However, if you are using a more expensive maintenance free battery that does not require you to replenish the water (such as this one), you need to fasten the fluid sensor rod between the wingnut and the positive terminal to deactivate the water level alarm (per Basement Watchdog’s FAQ). (This Youtube video explains in more detail.) If it’s placed in the wrong cell, this would trip the alarm even if the fluid levels are correct. For Basement Watchdog systems, this would be the second cell over from the positive terminal. If you don’t, the alarm will sound once too much water has evaporated.Īlso, make sure the sensor is inserted into the proper cell. If you have a wet-cell battery, the most common type of battery for backup sump pumps, you need to regularly maintain the levels of distilled water in the individual battery cells. Filling battery cells with distilled water ![]()
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