How Long Does a Sump Pump Battery Last?

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    Everyone has had to deal with a flooded basement or crawlspace at some point in their life and the main culprits in basement flooding are sump pumps batteries dying.

    Sump pumps batteries provide additional protection in case of prolonged power outages, preventing costly structural damage and mold growth. Unfortunately, they only last for a limited amount of time while powering a sump pump and go bad and need replacing from time to time.

    How Long Does a Sump Pump Battery Last on a Single Charge

    There are a few factors that determine how long a sump pump battery will last before it needs to be recharged. The four main factors to be aware of are the horsepower of your sump pump, how often it turns on and off, how many sump pumps you have connected to the battery and how much charge the battery holds.

    Horsepower – Smaller pumps use less power than larger pumps so the higher the pump horsepower, the more power it’s going to take from your sump pump battery.

    Number of sump pumps – Most homes only have one main sump pump. If you have more than one pump hooked up to the battery, they’re going to take power from it much faster than a single pump would.

    How often the pump activates – how long the battery backup system lasts is going to be affected by how often your sump pump activates. If you turn it on and off more often, it’s going to use up more power than if it stayed on for a longer period of time.

    Charge of battery – If you have a weak or undercharged sump pump battery, your sump pumps will use much more power from it which will mean that your battery runs dry in less time and needs recharging more often. Older batteries tend to hold less charge than new units.

    So how long does a sump pump battery last?

    The amount of time your battery lasts depends on how often you use the sump pump, how many hours per day it’s used, how much water is pumped out of the pit and the head height.

    Less Charge with Older Batteries

    The batteries in sump pumps tend to decrease their power output as they age. This means that even if the manufacturer says your battery is good for certain number of cycles, you may need to replace it before then or risk running out of power and ruining everything.

    How Long Does a Sump Pump Battery Last Before Replacing

    If you select a battery with double the power of your pump, how long does a sump pump battery last before replacing it will be somewhere around 14-16 hours. If there’s an extended power outage and you need to keep pumping, how long does a sump pump battery last on a single charge may only get you through half the night so you may need a backup or a water powered sump pump.

    Sump Pump Battery Replacement Timeline

    New batteries will store around 2-3 years worth of power. The first how long does a sump pump battery last should be replaced about two to three years after it’s installed and if you replace how long does a sump pump battery last every two to three years, there should never be an interruption in your home or business.

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