Plumbers Sherman TX | Contact Us For a Quote Now!

How Does Sump Pump Battery Backup Work | Beyond Electricity [2024]


Want to know How does sump pump battery backup work? Well, read the whole content; you will get your full answer from here. We write this content with our previous experience, which you can understand when you implement it during your working time.

The vulnerability of basements to flooding during power outages is a common concern for homeowners. Imagine a scenario where heavy rainfall or a storm causes an electrical outage, leaving your primary sump pump powerless and your basement at risk of water damage.

This is where the critical role of a sump pump battery backup comes into play. In this introduction, we delve into the workings of a sump pump battery backup system, exploring the mechanisms that ensure continuous operation and reliable protection for your basement, even in the face of power disruptions.

Understanding how this backup system functions is key to fortifying your home against the potential havoc of unexpected water intrusions. Also, if you need to install a sump pump you need to hire a professional plumber to do this properly. Contact Plumbers Sherman TX for every plumbing-related problem, we are based in Sherman, TX area.

The Sump Pump Battery Backup Advantage

Savvy homeowners understand the vulnerability of primary sump pumps that rely on electricity. Basement flooding can occur rapidly after a power outage, leading to extensive water damage. A sump pump battery backup system provides a solution by ensuring continuous power to a backup sump pump during electrical outages.

Two-Stage System

Battery backup systems are often referred to as two-stage systems. When your home’s power is operational, the primary sump pump uses electricity. However, in the event of a power outage, the backup battery automatically activates, providing the necessary energy for the backup sump pump to function.

Read: Why is Copper Better than Iron for Water Pipes

Can Homeowners Install a New Sump Pump and Battery Backup Themselves?

While a homeowner with electrical and water-handling skills may attempt installation, it’s advisable to entrust the task to professionals. Primary sump pumps should ideally be connected to a dedicated GFCI (ground-fault circuit interrupter) outlet for safety. GFCI outlets halt power in case of a ground fault, ensuring secure operation.

Installation Considerations

  1. GFCI Outlet Requirement: When selecting a GFCI outlet, ensure it can handle the increased power consumption when the pump activates.
  2. Water-Resistant Battery Case: The battery backup system’s battery should be housed in a water-resistant protective case, preventing electrical shorts in case of leaks.
  3. Extension Cord Usage: Until a proper GFCI outlet is installed, use extension cords for the battery backup system. Later, the pump should be directly plugged into a GFCI-protected outlet above the high water line.
  4. Alarm System: Many backup systems include an alarm that signals if the battery backup is activated, alerting homeowners to potential issues with the primary electrical pump.

Can Battery Backups Be Added to Existing Sump Pumps?

Yes, it’s possible to add a battery backup to an existing sump pump without one. This involves connecting the primary sump pump and the new backup pump to the battery backup controller. The battery is then connected to an electrical outlet, providing a trickle charge for backup battery operation.

Read More: How to Increase Bacteria in Septic Tanks Naturally

Sump Pump Battery Replacement

It’s essential to replace the battery used in a sump pump battery backup system every two to three years. Continuous recharging can lead to decreased battery efficiency. If a replacement is needed, contacting the contractor or manufacturer is advisable.

Sump pump battery replacement is a critical task to uphold the efficiency and reliability of your basement flood protection system. Over time, the battery in a sump pump backup system can experience wear and diminished capacity due to continuous charging and discharging cycles.

Regularly replacing the battery, typically every two to three years, is essential to ensure optimal performance during power outages or pump failures. When undertaking the replacement, it’s crucial to select a high-quality deep-cycle battery compatible with your specific sump pump model.

Carefully follow the manufacturer’s guidelines for installation and charging to maximize the new battery’s lifespan. By proactively addressing battery replacement, homeowners can fortify their sump pump systems, maintaining peace of mind and safeguarding their basements against potential water damage.

Homeowner’s Guide to Sump Pump Battery Backups

Video Credit: This Old House

A sump pump installation is incomplete without considering backup systems for power outages. Understanding the options and their pros and cons is crucial for homeowners.

What Causes Primary Sump Pumps to Fail?

Power outages are the most common reason for primary sump pump failures. Other factors include pump malfunctions, float switch issues, or pump overload during heavy rainfall or snowmelt.

Also Read: How to Prevent Outdoor PVC Pipes From Freezing

How Does a Sump Pump Battery Backup Work?

A sump pump battery backup system operates independently of the primary pump, residing in the same sump basin. It activates if the primary pump fails or if there is a power outage. The backup system maintains battery charge when the power is on and utilizes it during outages.

Sizing a Pump

When selecting a pump, consider the GPH (gallons per hour) rating and the head (height water must be lifted). The backup system’s battery capacity and charger sophistication vary among good, better, and best models.

Pros and Cons of Battery Backup Systems


  • Simple installation
  • Works without water supply
  • Immediate operation during power outages


  • The battery may deplete before power restoration
  • Regular battery maintenance required
  • Battery replacement every five years

Read This: How Does Trenchless Sewer Line Replacement Work

Water-Powered Backup Pumps

Water-powered backup pumps use water pressure to remove sump water. These pumps have advantages and drawbacks, including the potential impact on water bills in areas with water shortages.

Pros and Cons of Water-Powered Pumps


  • No limit to run-time
  • No battery replacement costs
  • Minimal routine maintenance


  • Ineffective for well users during power outages
  • Complex installation with new water lines
  • Potential high water costs in water-scarce areas

Power Your Sump Pump with a Generator

Backup generators can power a sump pump during outages, but they require manual activation and won’t help if the primary pump fails.

Pros and Cons of Generators


  • No need for additional pumps
  • Can power other appliances
  • Suitable for long outages with sufficient fuel


  • Requires manual activation
  • Expensive and costly to run
  • Doesn’t address primary pump failures

Check: How Hard is it to Replace a Kitchen Sink Faucet

Know When Your Pump is Dead

To avoid discovering pump failure after damage occurs, use alarms that detect water levels or send notifications via landline or text messages.

How Does a Battery Backup Sump Pump Work?

A battery backup sump pump operates independently, activating when the primary pump fails, there is a power outage, or the primary pump is overwhelmed. It undergoes regular testing and alerts homeowners to issues, ensuring constant readiness.

Considerations for Battery Backup Systems

  1. Battery Selection: Choose a deep cycle battery and maintain its charge with a voltage maintainer charger.
  2. Testing and Alerts: Battery backup systems should undergo monthly testing, with alarms for failures, power outages, or low battery levels.
  3. Communication Features: Advanced systems offer direct communication to homeowners’ phones for real-time alerts and status updates.

How to Recharge Sump Pump Battery

Recharging a sump pump battery is a crucial aspect of ensuring the continuous and reliable operation of your backup system. To recharge the battery, start by disconnecting it from the sump pump system. Many batteries in these systems are deep-cycle batteries, and they benefit from a slow and steady recharge.

Utilize a battery charger specifically designed for deep-cycle batteries and set it to a low amperage setting. It’s essential to charge the battery in a well-ventilated area to prevent the buildup of potentially explosive gases.

Allow the battery to charge fully before reconnecting it to the sump pump system. Regular maintenance, including periodic recharging, is key to extending the life of the battery and ensuring that it’s ready to kick in during a power outage or pump failure, providing the essential backup your basement needs for protection against flooding.

Check: How to Install Plumbing in Existing Concrete Slabs


A sump pump battery backup system is a crucial investment to safeguard your basement from flooding during power outages. Understanding the installation process, types of backup systems, and their pros and cons empowers homeowners to make informed decisions.

Whether opting for battery backups, water-powered pumps, or generators, a reliable backup system ensures your sump pump keeps your basement dry, providing peace of mind in any situation.

Also, Check Our Valuable Posts We Shared Some Important things.

How to Draw Plumbing Lines on a Floor Plan

How to Connect to Lead Water Pipe?

How to Finish a Basement Bathroom with Rough-in Plumbing?

Which of The Following Processes Requires Separate Plumbing?

How to Fix Water Pipe in Automatic Washing Machine?

What causes low water pressure in the whole house?

What are the two most common problems repairs with toilets?

How to Repair a Natural Gas Line in a Home That Was Cut in Half

How to Repair a Single Handle Kitchen Faucet With a Spray Hose

How to Repair PVC Pipe Without Cutting

How to Repair Damaged Plastic Pipe Threads

How Much Does a Plumber Charge to Install a Boiler?

Can You Use Plumbers Putty on PVC?

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top