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Basements are apt to flooding because they are below grade. If water comes in, there is nowhere to go. Many basements have a sump pump set up on a pit in the cellar flooring to aid in these circumstances. When water starts filling the pump basin, the pump kicks on and pumps the water from the sump pit. So long as the pump is receiving energy, it is a dependable system. Regrettably, storms that bring flash flooding and torrential rains, from time to time, bring high winds and lightning, which can down a power line or knock away a transformer, leaving your house with no electrical power for hours or days. Without the pump to eliminate water, the basement might flood.

For all those occasions when the power is out, it is advisable to use a backup for getting rid of water out of the cellar. This is where the battery backup sump pump comes in handy. When the power goes out, the device turns on and takes over, pumping out water until the electricity returns. The most effective sump pump battery backup for your house is determined by how frequently your present sump pump cycles to eliminate water and how long a power outage typically lasts in your location. The following seven sump pump battery backups are going to step up once the power goes out.

Wayne WSS30VN Upgraded Combination 1/2 HP and 12-Volt Battery Back Up System , Black
  • New and upgraded WAYNE WSS30V. Completely pre-assembled and drop in ready.
  • Primary pump float switch tested to 1 million cycles, up to 10X more than competitors.*
  • Assembled in the US with foreign and domestic parts
  • Protection when you need it, back up pump continues running when the power is out. For Use In 16 inch. Diameter or Larger Sump Basins
  • Primary pump moves up to 5100 GPH at 0 feet of head.
PumpSpy PS2000 WiFi Battery Backup Sump Pump System with Internet Monitoring & Alerts
  • Free monitoring included! No monthly charges or subscriptions required. Connects to your WiFi for data connection.
  • Works with any 120-Volt primary sump pump! Simply plug your sump pump into the 120-Volt outlet on the PumpSpy controller for PumpSpy to start watching your sump pump.
  • Get instant alerts on your phone with the FREE PumpSpy app. Check on your pumps from anywhere with your mobile device.
  • PumpSpy computers watch your main sump pump, backup pump and battery. System tests are performed 3X per week.
  • PumpSpy products are made in USA from domestic and imported parts
WAYNE BGSP50 Guardian Premium Wi-Fi Connected Total Basement Protection System
  • Assembled in the USA, complete, pre-plumbed sump pumps for easy installation in as little as 15 minutes. Drop in the pit ready!
  • Two fully submersible, nested, all cast iron, AC & DC sump pumps. Solid state air switch reads water level and automatically turns pump on when needed!
  • Free Apple iOS and Android mobile apps for continuous monitoring, even when the power is out. No monthly charge!
  • Innovative Local Link technology transmits data to the app during power outages, for connectivity when your Wi-Fi router is down
  • When the power goes out, the back up drains 11,000 gallons on one charge. As much as a standard swimming pool!
Wayne ESP25 Upgraded 12-Volt Battery Backup System, Black
  • Upgraded ESP25 with epoxy steel body and cast-iron base. No more plastic
  • 2700 GPH at 0' provides additional protection to your primary Wayne sump pump
  • Assembled in USA, performance that lasts for years
  • Audible alarm sounds, notifying you when the back up system is active
  • Easy to read LED display shows back up system readiness
Zoeller 508-0006 Aquanot 508 ProPak53 Preassembled Sump Pump System with Battery Back-Up
  • Includes: Model 53 115-volt pump, Model 508 Aqua not, 115 Volt DC backup system with pump, check valve, float switch and piping
  • Plumbed in 1-1/2" Such 40 PVC pipe
  • Comes fully assembled and ready to install in your clear water sump
  • Extra protection when the primary AC pump fails due to power outages
  • Fully solid state automatic 10A charger/controller with alarm, light indicator and warning system
Zoeller 508-0005 Aquanot 508 Battery Back-Up System
  • 12 volt highly efficient noncorrosive pump construction
  • Integrated check valve
  • Quick disconnect discharge
  • Aluminum seal pocket & cooling plate
  • Hand built & 100% tested in USA
Zoeller 507-0005 Basement Sentry Battery Backup Pump
  • Provides extra protection when the primary AC pump fails due to power outages, when the primary pump fails
  • All models have battery burn out and overcharge. Control device -Reliable low voltage float switch
  • Model 507 has a self contained 10 amp battery recharger. Battery case made from noncorrosive polyethylene. Contains lock strap
  • All systems are fully solid state automatic controllers with alarms, light indicators and have warning systems
  • NOTE: Sump Pump and Battery are not included, as they must be purchased separately. Alarm Off - yellow light indicates the buzzer is currently silenced

What To Consider When Selecting The Best Sump Pump Battery Backup

Dependability and longevity are among the best considerations when selecting a sump pump battery backup. When searching for a backup sump pump, how rapidly it can eliminate water and the length of time it can operate before the electric battery runs down are essential features.

Material Of The Sump Pump Battery Backup

Battery backup sump pumps often feature housings made from industrial thermoplastic, stainless steel, or some other waterproof materials made to withstand corrosion. The housing must be sealed to avoid water from getting inside the pump’s parts.

Pedestal Vs. Submersible

Like primary sump most pumps, an electric battery backup sump pump could be one of two types:

Submersible: A submersible unit rests within the sump pit, that is, in the basement floor. When water goes into the pit, the warm level starts to increase, and once the water reaches a certain level, the pump kicks onto pump water on the surface.

Pedestal: The pumping engine of any pedestal sump pump rests atop a column, and the base of the column sits within the sump pit. The column is around two to three feet high, so the pump motor rests above the floor. Since the pump rests above the water, it should be moisture resistant, although not completely waterproof like a submersible pump.

Battery & Runtime Of Sump Pump Battery Backup

Battery backup sump pumps operate on 12-volt, acid-free batteries. Some manufacturers advise a battery that is marine rated, which could mean it will withstand moisture better than a regular 12-volt battery power. A 12-volt battery’s power can vary from 40-amp hours to 80-amp hours or more, with 75 amp hours the most common. The bigger the amp-hours, the better the battery power and the longer the backup pump will go. How rapidly a battery runs down is determined by how much water enters the sump pit and how frequently the pump should cycle to pour it out.

For instance, if a backup sump pump cycles after every four minutes & most pumps out 1.5 gallons with every cycle, a 40-amp-hour electric battery could last 32 hours, while a 120-amp-hour battery may last better than 96 hours. Nevertheless, in case the pump cycles each second, the 40-amp-hour battery’s runtime will drop to around eight hours, and also, the 120-amp-hour battery will last better than 24 hours.

Yet another aspect enters the scene: After four or maybe five years, a 12-volt battery will begin to shed several of its power to support a charge. What this means is that an old battery is going to have much less runtime. Deciding on a strong battery—and changing that battery every four or five years—will be the better option for maintaining the basement free from unnecessary water.

Gallons Per Minute 

Also referred to as its capacity, a backup sump pump’s gallon-per-hour (GPH) rate estimates the optimum amount of gallons it can pour out within one hour when the power supply is fully charged. This quantity generally appears on the pump’s label or in its product description, and it is directly associated with the power (measured in horsepower) of all of the pumps. Most backup sump pumps are going to remove a typical of 1,800 to 2,000 GPH with a 10-foot lift, which suggests they’re able to pour much water to a height of ten feet, and that is the standard level needed to eliminate water from below a cellar to the ground level.

Easy Installation Of The Sump Pump Battery Backup

Installing a battery backup sump pump is not a tough task. It takes simple plumbing methods; most communities need a licensed plumber to finish the setup. Consult your local building authority for the regulations in your area. 

The simplest type of backup pump to put in is a combination unit, consisting of both the main pump and a backup pump nested together. Because the two pumps come attached, there is simply no requirement to splice the drainpipe to put in the second pump.


A battery backup sump pump must be powerful and durable enough to safeguard the basement from flooding when the power goes out. Our winner is perfect for keeping your basement dry in any weather type.

The Wayne WSS30VN Sump Pump structure features a high-quality suction mechanism to reduce debris and limit clogging. There’s also a brightly lit LED alarm system signal that allows homeowners to remain abreast about status updates.

Even if the pump moves away, the engine will keep running. This pump is Ultra Quiet and doesn’t create an annoying noise. Developed by an industry leader with more than 80 years of experience, Wayne understands basement sewage management better compared to anybody else in the industry.

Consequently, you can stay away from producing a vent or weep hole because this pump does everything for you personally. The product is around 24 lbs. Therefore, it doesn’t need strain to carry.

Furthermore, it comes already pre-assembled to drop directly into the sump basin. The outside has a rugged cast metal, epoxy coated construction for rough handling and tough applications.

Lastly, there’s a smart charging technology that restricts the total amount of energy utilized by the DC current.

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