Best 5 Combo Sump Pumps With Battery Backup You Can Buy

Peter Armani | 22-02-2026

A combo sump pump with battery backup is a smart investment for homeowners who want reliable basement protection, even during power outages. These systems combine a primary sump pump with a backup unit powered by a battery, automatically switching over when electricity fails. If you live in an area prone to heavy rain or storms, having a dependable combo system can help prevent costly water damage and give you peace of mind. Below, we compare several popular options and explain what to look for when choosing the right system for your home.

Editor's Choice
Basement Watchdog Big Combo CONNECT Preassembled System
Basement Watchdog Big Combo CONNECT Preassembled System
Premium Pick
WAYNE 1/2 HP Sump Pump With 12V Battery Backup
WAYNE 1/2 HP Sump Pump With 12V Battery Backup
Budget Pick
Basement Sentry Battery Backup Sump Pump Combo
Basement Sentry Battery Backup Sump Pump Combo

Top 5 Combo Sump Pumps With Battery Backup

We researched and compared the top products in the Combo Sump Pumps With Battery Backup category to provide you with these recommendations.

1. Basement Watchdog Big Combo CONNECT Preassembled System

WiFi Monitoring Alerts
Basement Watchdog Big Combo CONNECT Preassembled System
9.8

The Basement Watchdog

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This preassembled sump pump system combines a durable primary pump with a battery backup, designed for straightforward installation and everyday peace of mind. The materials feel robust, and the system is practical for homeowners who want continuous monitoring and protection. It's well-suited for basements where remote alerts and easy maintenance are priorities.

What We Like:

  • WiFi-capable for real-time alerts
  • Preassembled for quick setup
  • Detailed maintenance guidance with alarms
  • Compatible with multiple battery types
  • Option to double runtime with two batteries

What Could Be Improved:

  • WiFi module requires separate purchase
  • Battery not included

2. WAYNE 1/2 HP Sump Pump With 12V Battery Backup

Quick Drop-In Install
WAYNE 1/2 HP Sump Pump With 12V Battery Backup

This combo system features a sturdy, efficient build with a vertical float switch and integrated backup. The materials have a solid, utilitarian feel, and the unit is designed for easy installation in most standard sump basins. It's practical for busy homeowners who want minimal setup time and reliable operation during storms or outages.

What We Like:

  • Preassembled for fast installation
  • No need to drill a weep hole
  • Tested for long-term durability
  • Quiet operation
  • Long power cord for flexible placement

What Could Be Improved:

  • Backup battery not included
  • Indoor use only

3. Basement Sentry Battery Backup Sump Pump Combo

Extended Battery Life
Basement Sentry Battery Backup Sump Pump Combo

This pre-assembled combo offers a straightforward solution for basement flood protection, pairing a high-performance primary pump with a backup and controller. The components feel sturdy, and the system is practical for those who want extra peace of mind during outages. It's ideal for homeowners seeking a system with a focus on battery efficiency.

What We Like:

  • Includes alarm and charger
  • Battery box helps extend battery life
  • Fast battery charging
  • No acid maintenance with compatible battery
  • All-in-one package for easy setup

What Could Be Improved:

  • Battery sold separately
  • Limited information on compatibility with other batteries

4. Westinghouse Battery Backup Sump Pump System

Compact Dual Pump Design
Westinghouse Battery Backup Sump Pump System
8.9

Westinghouse

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This system features dual sump pumps with automatic switchover, built with corrosion-resistant stainless steel for lasting use. The compact design fits easily into tight spaces, making it practical for both residential and light commercial basements. It's a good choice for those who need dependable water removal and efficient operation during emergencies.

What We Like:

  • Dual-pump setup for reliability
  • Durable stainless steel construction
  • Top suction reduces clogging
  • Thermal overload protection
  • Space-saving design

What Could Be Improved:

  • Battery not included
  • May require professional installation in some setups

5. Basement Watchdog Maintenance Free AGM Standby Battery

No Maintenance Needed
Basement Watchdog Maintenance Free AGM Standby Battery
8.7

The Basement Watchdog

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This maintenance-free AGM battery is designed for use with backup sump pump systems, offering dependable standby power without the need for fluid checks. The sealed design feels robust and is practical for homeowners who want hassle-free operation. It's suitable for those seeking a reliable backup battery that can run pumps intermittently for days.

What We Like:

  • No fluid or water checks required
  • Long standby protection
  • Compatible with several backup systems
  • Sealed, spill-proof design

What Could Be Improved:

  • Compatibility limited to certain systems
  • May trigger false alarms in older setups

How to Choose Combo Sump Pumps With Battery Backup

Assessing Your Basement's Needs

A larger or wetter basement may need a higher-capacity system. Frequent outages or heavy storms increase the value of a robust backup.

Pump Performance and Capacity

Choose a system that can keep up with your worst-case water inflow. Backup pump capacity is usually lower than the primary, but should still provide meaningful protection.

Battery Backup Features

Battery choice affects both runtime and maintenance. AGM batteries are popular for being spill-proof and low-maintenance.

Installation and Maintenance

Easy installation is a plus for DIYers, while maintenance reminders and remote alerts help prevent surprises.

Additional Protection and Monitoring

Advanced monitoring features can provide peace of mind, especially if you travel or can't check the pump regularly.

FAQ For Combo Sump Pumps With Battery Backup

1. What is a combo sump pump with battery backup?

A combo sump pump with battery backup combines a primary electric sump pump and a secondary battery-powered pump in one system. The backup pump activates automatically during power outages to help prevent basement flooding.

2. How long will the battery backup run during a power outage?

Battery backup runtime varies based on the battery type, pump usage, and water inflow. Many systems are designed to provide several hours to a couple of days of intermittent pumping on a full charge.

3. Can I install a combo sump pump system myself?

Many combo systems come preassembled for easier installation, but you should ensure your sump pit is compatible and follow all safety guidelines. Some homeowners may prefer professional installation, especially for complex setups.

4. What kind of maintenance do these systems require?

Regular maintenance includes checking for debris in the sump pit, testing the pumps periodically, and ensuring the battery is charged and in good condition. Maintenance-free batteries reduce the need for fluid checks.

5. Do I need a specific type of battery for my backup sump pump?

Most systems recommend or require a specific battery type, such as AGM or deep-cycle batteries. Always check the manufacturer's guidelines for compatibility and performance.
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Peter Armani

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