A battery-powered backup pump activates automatically when the main sump pump stops working or power goes out. Most systems include a secondary pump connected to a deep-cycle battery that takes over if rising water triggers the float switch.
These systems provide an extra layer of protection when the primary pump fails. But how long will a backup pump realistically keep running during heavy storms? Below, this backup sump pump installer in Northbrook, Illinois is going to explain what affects backup sump pump runtime.
What affects the runtime of a backup sump pump battery?
Battery capacity plays a major part in determining runtime. Backup sump pumps commonly use deep-cycle batteries rated in amp-hours, which measure how much electrical energy the battery can store and deliver over time. Larger batteries with higher amp-hour ratings store more energy, which is how the pump can run longer during a power outage.
Pump efficiency also affects runtime. Different backup pumps move different amounts of water while using different amounts of electricity. Some pumps move thousands of gallons per hour while drawing relatively little power. These types of pumps have an excellent battery life.
Another important factor is how fast water enters the sump pit. The rate of groundwater infiltration depends on soil conditions around the home. Dense clay soils, common throughout parts of northern Illinois and the Midwest, tend to drain slowly and retain water longer after storms. When these soils become saturated, water pressure builds around the foundation and forces groundwater into perimeter drain tiles that direct it toward the sump basin.
Battery age and condition also affect performance. Most sump pump backup systems use lead-acid batteries that gradually lose capacity over time due to internal chemical changes and repeated charging cycles. Most back up sump pump installers in Northbrook, Illinois recommend replacing batteries every few years.
How long do most battery backup sump pumps run?
A battery backup sump pump can run anywhere from about 6 to 24 hours during a power outage. The exact runtime depends on how frequently the pump activates and how much water it needs to remove. In some scenarios, a fully charged battery can provide several hours of continuous pumping if the sump basin fills rapidly during a storm.
But sump pumps usually do not run continuously in residential settings. They operate in cycles.
When the water level in the sump basin rises high enough, the float switch activates the pump to remove the water. Once the basin empties, the pump shuts off until the water level rises again. Because of this intermittent operation, the same battery may be able to power a backup sump pump for 1 to 3 days if the pump only runs occasionally.
Backup sump pump installers in Northbrook, Illinois typically recommend high-capacity batteries for homes with finished basements or areas that are prone to flooding. Larger batteries store more energy and provide additional runtime. Some systems even allow homeowners to connect multiple batteries to increase capacity.
Regular battery testing and replacement are also important. Backup systems should be inspected periodically to confirm batteries are charging properly.
Looking for a backup sump pump installer in Northbrook, Illinois?
Are you ready to partner with a backup sump pump installer in Northbrook, Illinois that can ensure your home stays dry while your power is out? If so, R. Carrozza Plumbing Co is just a call away. Our licensed plumbers install reliable sump pump backup systems that protect basements during storms and power outages. We can evaluate your existing sump system and recommend (and install) the right battery capacity for your home. Contact our team today to schedule service.