The Best Battery Backup Sump Pumps

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Battery backup sump pump systems can help you stay worry-free and your basement water-free during an emergency or power outage.

Basements are subject to flooding because they’re below grade. If water trickles in, it has no place to go. Many basements have a sump pump installed in a pit in the basement floor to help in these situations. Unfortunately, storms that bring torrential rains and flash flooding also sometimes bring high winds and lightning that can down a power line or knock out a transformer, leaving your home without electricity for hours or even days.

For those times when the power is out, it’s a good idea to have a backup plan for removing water from the basement. The best battery backup for existing sump pumps cycles to remove water and how long a power outage typically lasts in your area. The following sump pump models will step up when the power goes out.

1. BEST OVERALL: WAYNE BGSP50 Guardian Basement Protection System
2. RUNNER-UP: Basement Watchdog Model CITS-50 Sump Pump
3. BEST BANG FOR THE BUCK: Basement Watchdog Model BWE Backup Sump Pump
4. EASIEST TO INSTALL: Zoeller Aquanot 508 Sump Pump System w/ Battery
5. LOW MAINTENANCE PICK: Superior Pump 92900 12V Battery Back Up Sump Pump
6. BEST COMBINATION: Wayne WSS30VN 1/2 HP and 12-Volt Battery Back Up System
7. BEST SMART: Basement Watchdog Model BWSP Sump Pump with WiFi
8. BEST HEAVY-DUTY: Basement Watchdog Big Dog CONNECT 3500 GPH Sump Pump

Our Top Picks

Battery backup sump pump systems should be durable and powerful enough to protect from basement flooding if the power goes out. The following models are some of the best options for keeping your basement dry in any kind of weather.

Best Overall

WAYNE BGSP50 Guardian Basement Protection System

Those in the market for a new primary pump in addition to a backup pump may want to look no further than the combination sump pump system, the Wayne Basement Guardian premium protection system.

It features a main sump pump that plugs into a household outlet and comes with a nested, ½-horsepower backup sump pump that accepts a 12-volt battery (sold separately). Both pumps are made from cast iron and aluminum, and the unit is submersible.

The primary pump can pump up to 3,840 GPH of water at a 10-foot lift, and the backup pump can pump up to 2,040 GPH to the same lift. This combo unit connects to home Wi-Fi systems, and it syncs with a smartphone to provide alerts when the power is out and the backup sump pump is active.

Product Specs

• Type: Combination system
• Flow Rate: 3,840 GPH (primary), 2,040 GPH (backup)
• Battery Power: 75 amp hours

Pros

• Includes primary and backup pumps
• Sends alerts via smartphone
• Sturdy cast iron and aluminum build

Cons

• Battery sold separately

Get the WAYNE protection system at Amazon or Ace Hardware.

Runner-Up

THE BASEMENT WATCHDOG Model CITS-50 Sump Pump

Coming in at second place, the Basement Watchdog Special CONNECT sump pump with battery backup is a combination unit that includes both a primary sump pump and a battery backup pump.

This nested, submersible pump is constructed with cast iron and cast aluminum for durability. It’s designed to run on AC unless the power goes out, and then the battery backup pump kicks in. The pump runs on a 12-volt battery, which is not included.

The primary pump is rated to pump 3,200 GPH at a 10-foot lift, and the backup pump is rated to pump 1,730 GPH of water to that same height. For the longest runtime, choose a battery with 75 amp hours or higher. This unit is not Wi-Fi capable, but in the event of a power loss, it will emit an audible alarm.

Product Specs

• Type: Combination system
• Flow Rate: 3,200 GPH (primary), 1,730 GPH (backup)
• Battery Power: 75 amp hours

Pros

• Includes primary and backup pumps
• Sturdy cast iron and aluminum build
• Emits alarm when power goes out

Cons

• Batteries not included
• Not Wi-Fi compatible

Get THE BASEMENT WATCHDOG CITS-50 sump pump at The Home Depot or Lowe’s.

Best Bang for the Buck

THE BASEMENT WATCHDOG Model BWE Backup Sump Pump

You can protect your basement from flooding without having to spend a lot of money. The Basement Watchdog battery backup sump pump is rated to pump 1,000 GPH at a 10-foot lift. Since it’s a secondary pump only, a primary pump also must be installed with it in the sump basin.

The submersible pump housing is made from heavy-duty thermoplastic to make it waterproof and corrosion-resistant. This affordable backup pump runs on a 12-volt battery (not included) with a 75 amp hour runtime.

Product Specs

• Type: Secondary pump
• Flow Rate: 1,000 GPH
• Battery Power: 75 amp hours

Pros

• Affordable unit
• Heavy-duty thermoplastic build
• Waterproof and corrosion resistant

Cons

• Batteries not included

Get THE BASEMENT WATCHDOG BWE sump pump at The Home Depot or Overstock.

Easiest to Install

Zoeller Aquanot 508 Sump Pump System w/ Battery

With the Zoeller Aquanot sump pump with battery backup, the backup pump doesn’t have to connect to the primary pump because it’s a combination unit. It comes fully assembled, ready for a plumber to install in a basement sump pit. This submersible unit is made of cast iron and thermoplastic components that resist rust and corrosion.

The primary pump is rated at 2,040 GPH with a 10-foot lift, and the ⅓-horsepower backup pump is rated for 1,800 GPH of water with the same lift. This battery backup system also comes with a lockable battery box, which requires a 12-volt battery that’s not included. When the power goes out, it lets you know with a light indicator and an audible warning.

Product Specs

• Type: Combination system
• Flow Rate: 2,040 GPH (primary), 1,800 GPH (backup)
• Battery Power: Over 90 amp hours

Pros

• Includes primary and backup pumps
• Comes fully assembled
• Durable cast iron and thermoplastic build

Cons

• Battery not included
• May require professional installation

Get the Zoeller sump pump system at Lowe’s.

Low Maintenance Pick

Superior Pump 92900 12V Battery Backup Sump Pump

Made from corrosion-resistant, thermoplastic construction, the Superior Pump battery backup sump pump should provide years of reliable protection from flooding when the power goes out. It comes with an easy-to-remove and clean intake screen filter that keeps debris from entering the pump’s motor. It also comes with a thermoplastic battery box to protect the 12-volt battery (not included) from moisture and corrosion.

The Superior Pump is a backup-only pump, and it must be installed alongside a primary electric sump pump. This battery backup system is rated to remove up to 1,080 GPH of water to a 10-foot lift; for the best results, use a battery with 75 amp hours or higher.

Product Specs

• Type: Secondary pump
• Flow Rate: 1,080 GPH
• Battery Power: 75 amp hours

Pros

• Corrosion-resistant, thermoplastic build
• Thermoplastic box protects the battery
• Removable intake screen filter is easy to clean

Cons

• Battery not included

Get the Superior Pump bacup sump pump at The Home Depot or Lowe’s.

Best Combination

Wayne WSS30VN 1/2 HP and 12-Volt Battery Back Up Syst

For high efficiency and flood protection in a combination unit, look no further than the Zoeller ProPack combination primary and backup sump pump system. This nested unit features a primary pump rated to pump 3,660 GPH of water at a 10-foot lift and a backup pump rated to pump 1,800 GPH to the same lift.

This combination unit features an engineered thermoplastic exterior, and the housing is filled with oil and sealed hermetically to protect the pumps. The battery charger has an LED screen that displays the voltage left in the battery and other essential system information.

When the power goes off, the Zoeller combination pump system emits an audible alert. The unit works on both AC for the primary pump and a 12-volt battery (not included) for the backup pump.

Product Specs

• Type: Combination system
• Flow Rate: 3,660 GPH (primary), 1,800 GPH (backup)
• Battery Power: 75 amp hours

Pros

• Includes primary and secondary pumps
• Sturdy thermoplastic exterior
• Sealed hermetically for durability
• LED screen
• Audible alert when the power shuts off

Cons

• Battery not included
• Expensive

Get the WAYNE battery backup system at Amazon or The Home Depot.

Best Smart

THE BASEMENT WATCHDOG Model BWSP Sump Pump with WiFi

Receive notifications when the power goes out with the Basement Watchdog battery backup sump pump with Wi-Fi. This submersible, backup-only pump is designed to sync with your home’s Wi-Fi system and send notifications directly to your smartphone via a downloadable app. You also can monitor the pit’s fluid level and the remaining battery charge from your phone.

This battery backup system is designed for use with an existing primary sump pump, and it runs on a 12-volt battery (not included). When the power goes out, it springs into action, pumping up to 1,730 GPH water to a 10-foot lift. In addition to sending notifications to a smartphone, the backup pump emits an audible alarm when the power goes out or when maintenance is needed.

Product Specs

• Type: Secondary pump
• Flow Rate: 1,730 GPH
• Battery Power: 75 amp hours

Pros

• Can monitor fluid level and battery charge via smartphone
• Comes with downloadable app
• Emits audible alarm in power outage

Cons

• Battery not included

Get THE BASEMENT WATCHDOG BWSP sump pump at The Home Depot, Lowe’s, or Ace Hardware.

Best Heavy-Duty

THE BASEMENT WATCHDOG Big Dog CONNECT 3500 Sump Pump

For peace of mind in those homes where the sump pump regularly cycles—even when it’s not storming—consider the Basement Watchdog Big Dog CONNECT battery backup sump pump.

This submersible backup pump is rated to pump 2,250 GPH of water at a 10-foot lift, making it the backup pump with the highest GPH rating on this list. It features sealed thermoplastic housing for long-lasting water protection, and it also comes with Wi-Fi capability, so you can download the app on your smartphone and receive notifications.

This is a backup-only sump pump and should be installed next to a primary sump pump. It runs on a 12-volt battery (not included), and the manufacturer suggests using a marine-rated battery for the best results. Users can connect an additional backup battery for double the runtime.

Product Specs

• Type: Secondary pump
• Flow Rate: 2,250 GPH
• Battery Power: 75 amp hours

Pros

• Affordable unit
• Sealed thermoplastic housing
• High GPM rating for a backup pump
• Sends notifications through the included app

Cons

• Battery not included
• May require marine-rated battery

Get THE BASEMENT WATCHDOG 3500 sump pump at The Home Depot or Lowe’s.

Jump to Our Top Picks

How We Chose the Best Battery Backup Sump Pumps

Preventing your home from flooding can save you money and headaches in the long run. The best battery backup sump pumps available can provide peace of mind in case of a flood, storm, or broken water pipe. The above selection of backup sump pumps was selected for their durability, ease of use, connectivity, and lift.

The featured pumps are made with cast aluminum, cast iron, or thermoplastic components to ensure long-lasting durability. Some are sealed hermetically to protect the internal components and battery. Many of the above picks are also made to be submersible and with 10-foot lift to remove water quickly and from the source.

Each unit on the list has the ability to move over 18 gallons of water per minute to ensure sufficient pumping capabilities. In the case of a power outage, many of these picks can also send notifications via smartphone app or through an emitted alarm.