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Choosing the Best Backup Battery for Your Sump Pump System

Feb 17, 2025

By webfx

A reliable backup battery is an invaluable addition to your sump pump system, providing peace of mind and protection against water damage during power outages. When you need to choose the best backup battery for your sump pump system, trust Zoeller at Home. This guide explores the different factors you must consider to make an informed choice. 

The Importance of Having a Reliable Backup Battery

Sump pumps are the first line of defense against basement flooding. They tirelessly direct excess water away from your home’s foundation. However, during power outages, which commonly occur during severe storms, your sump pump essentially becomes ineffective without a backup battery. 

Sump pumps need electricity to operate. Without it, water levels can rise in your basement. A reliable sump pump backup battery ensures your system continues to protect your home from water damage, even in the absence of power. It can save you from costly repairs and the effort of recovering from extensive damage. 

How to Select the Right Sump Pump Backup Battery

Choosing the best backup battery for your sump pump system is not a one-size-fits-all affair. Consider several factors to ensure you select a backup battery that can handle your specific needs. 

Capacity

Your backup battery’s capacity determines how long the system can run without recharging. Battery capacity for sump pumps is typically measured in amp-hours (Ah). To select the appropriate capacity, you must first understand your sump pump’s demands, accounting for its horsepower and the average water volume it moves. It’s best to opt for a higher-capacity battery if you need a backup for more extended periods. 

Type

Several types of sump pump batteries are available, including Absorbent Glass Mat (AGM), lead-acid and gel cell batteries. Each type has unique capabilities, such as deep cycles or no maintenance needed. Consider the sump pump battery’s maintenance requirements, life span and performance to choose the right type. 

Compatibility

Not all backup batteries will work with every sump pump system. To ensure compatibility, check your sump pump’s voltage requirements and the type of battery it supports. The battery’s terminals should also match those of your system. If in doubt, consult with the manufacturer or a professional installer. 

Choose Zoeller at Home for High-Quality Backup Batteries

Finding the right sump pump backup battery has never been easier with the broad selection from Zoeller at Home. We offer reliable backup batteries designed to keep your sump pump running when you need it most. We invite you to browse our offerings and contact your nearest retailer to speak to one of our representatives.