Best Battery Backup Sump Pump In 2021 | Buyer’s Guide & Reviews

If you are a homeowner, you’re well aware of the risk of flood and damages that it makes. So many basements get ruined during a series of unfortunate events caused by a massive storm. When you add power outage, the devastation is inevitable in the middle of the storm.

A primary backup sump pump is not enough protection because it runs off the primary power source, so you have to make sure to protect your home in a much more efficient way. Battery backup sump pumps are meant to support primary pumps, because the primary pumps can fail due the power outage, overheating or unrestricted use.

Top 5 Best Battery Backup Sump Pump On The Market


Top Rated Battery Backup Sump Pump Reviews


WAYNE WSS30V Pre-Assembled Battery Backup Combination Sump Pump

This product is a pump system with a backup battery system which is used to drain water away from wet humid ponds in your basement. It comes pre-assembled, so there is no need for you to spend time setting it up or calibrating it.

After the rain comes the flood and nothing is more frustrating than seeing your basement filled with water and all of your belongings soaking wet. With this sump pump system, your problem will persist no more! It has a high-performance index, reaching as much as 3300 GPH (gallon per hour), making it one of the most powerful DC pump in the market.

Fitted with an alarm system and status indicator lights, this pump will let you know when the backup system is on, saving you the trouble of having to constantly check up on it.

Best Battery Backup Sump Pump

Features and Specifications:

  • Top performing DC pump in the market
  • Tested to 1 million cycles
  • A streamlined design which helps to filter debris and prevent clogging
  • Powerful primary pump speed of up to 4200 GPH when the power is on
  • Requires a power source of 120V when the power is on
  • Designed for sump basins of 15’ and above in diameter
  • Boasts a maximum flow of 2900 gallons per hour, 1680 GPH at 10 feet of discharge lift
  • Weighing up to 33.5 pounds


  • High-powered pump, suitable for quick water removal
  • The primary pump is designed to help to filter debris and prevent clogging
  • Makes little noise during the pumping process
  • Comes pre-assembled


  • The float and rod can be quite loosely attached
  • Rusts easily, affecting the aesthetics

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WAYNE ESP25 12 Volt Battery Back-Up Sump Pump System

This product is a residential-use sump pump system which utilizes thermoplastic construction. It also has a one-of-a-kind float switch design which limits travel area, making it suitable for smaller sumps.

The system is fitted with the new and superior Smart Charging technology, optimizing the battery without sacrificing performance in return. There will also be an alarm system and a LED indicator to let users know when the backup system is on.

The sump pump battery backup is made of corrosive-resistant materials, with thermoplastic construction, ensuring that the pump will be sturdy and lightweight. It is recommended to use the pump in finished basements or basements with objects of high values because of its lightweight and its easy installation.

Battery Backup Sump Pump Reviews

Features and Specifications:

  • Superior Smart Charging technology to ensure stable energy flow
  • Alarm system with LED indicator to let users know when the backup system is on
  • Corrosive-resistant materials with thermoplastic construction
  • High pump performance of 3300 GPH at 10 feet of lift
  • Needs a 40-ampere battery, or a 70-ampere one
  • Weighs 13.5 pounds and reaches 10 inches in length


  • High-performance system with very little energy loss
  • Quiet pumping process
  • Easy to set up


  • Loud and short alarm
  • No shielding for the circuitry and wiring
  • Float control switch does not allow for customized timer

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Liberty Pumps SJ10 SumpJet Water Powered Back-Up Pump

This is a water-powered sump jump from Liberty Pumps which efficiently removes water from your basement in case of power outage, boasting a performance of 2 gallons of water removed per 1 gallon of water used. If a battery-powered backup system is not your thing, then this one might do the trick. It uses water from your local water supply to power its pump, so it will be usable irrespective of whether the power is on or off.

The system also comes with a removable foot valve. However, do be warned that it needs additional backflow protection in order to work properly. The material used in the product is PVC. The sump pump is fully automatic and requires an uninterrupted source of water in order to work efficiently. The preferred water inlet should range from 20 to 100 psi in pressure.

sump pump battery backup

Features and Specifications:

  • A high-powered pump which averages at 19.8 GPM if the inlet pressure is 60 psi
  • A ¾ Inch NPT water inlet connection which accepts a wide range of materials such as pex, copper, or CTS CPVC lines
  • UPC-approved system
  • An efficient system which removes 2 gallons of water per 1 gallon of water used
  • Works of local water supply. No need for electricity
  • Fully automatic system
  • Weighs only 5 pounds and reaches 21.6 inches in length


  • Very efficient and high-performing pumping system
  • Practical during long power outages
  • Costs less than battery-powered pumps
  • Comes pre-assembled, and it is easy to install


  • Clunky design that does not fit all sump basins
  • Requires additional backflow protection to works properly, which does not come cheap

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Zoeller 507-0005 Basement Sentry Battery Backup Pump

This is a battery-powered backup pump from Zoeller, one of the most reliable pump brands in the market. It is used to pump water out of your basements in case of power outage, or in case your primary pump fails, adding extra protection to your objects of high values. This model also comes with a battery burn-out and overcharges protection mechanism.

The pump system comes with a 10-ampere battery recharger, making sure that you can easily charge the product anywhere and anytime you want. The battery case is fashioned from a non-corrosive material, which keeps it from the tears and wears of the weather.

To add a finishing touch, the system is fitted with other conveniences such as an alarm system and light indicators. However, do be noted that this system does not include a sump pump or a battery. These components are sold separately.

best backup sump pump

Features and Specifications:

  • Comes with battery burn-out and overcharge protection
  • Reliable and easy-to-use low-voltage float switch
  • Long-lasting battery to ensure the basement stays clean until the main system is back online
  • Battery case made of corrosive-resistant materials
  • Contains a 10-ampere battery recharger
  • Weighs 13.35 pounds and reaches 12.5 inches in length
  • Voltage: 12V
  • Warranty for 1 year


  • Long-lasting batteries which last for more than 7 hours depending on duty cycle
  • Durable batteries which can endure years before they need to be replaced
  • Streamlined display
  • Easy to install and easy to understand tutorial


  • Low pump performance and can perform well in certain situations
  • Low longevity
  • Requires regular maintenance

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Zoeller 508-0005 Aquanot 508 Battery Back-Up System

If there is a power outage in your area, or if your primary pump fails due to technical issues, then this system is here for the rescue! Using battery backup system, this pump can keep your basement dry for a period of time until the power is back or until the primary pump can function again. Like most Zoeller pumps, it is fitted with an innate battery overcharge and burn-out protection failsafe.

Using the latest pumping technology, coupled with Zoeller’s timeless components, this system can pump out a large amount of water using minimal energy. Its performance can reach as high as 40 GPM. It also comes with an integrated check valve and aluminum seal pocket and a cooling plate.

The system’s design is streamlined so as to give you the best user experience. The display will always show you the voltage level, as well as other crucial information relating to the system. There will also be an alarm system integrated along the pump to show when it is online.

best battery backup sump pump reviews

Features and Specifications:

  • A high-performing non-corrosive pump system
  • The check valve is integrated
  • Aluminum seal pocket and a sealing plate
  • A user-friendly design
  • Comes with a 10-ampere battery recharger
  • An alarm system which lets you know when the pump is online
  • Weighs 16.3 pounds and reaches 10.5 inches in length
  • Hand-built and tested in the USA


  • Superior performance at 40 GPM
  • Quiet pumping process
  • A user-friendly design which ensures the most satisfying user experience
  • The system is easy to install


  • The pump can feel heavy
  • Some parts are a bit loose

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Benefits of using a Battery Backup Sump Pump

  • No worries about power outages

When you are a homeowner, one of your worst fears is probably power outages during a big storm, rapid snow melting or any other kind of weather disturbances. You can’t do anything until the thunderstorm settles down. So it will be the best option for you to have a device that will help you pump most of the water out without using general power. Battery backup sump pump is ideal for this kind of unwanted situation.

  • Very affordable

It’s better than buying a second sump pump because it’s way cheaper. It ensures your basement and belongings will be kept safe even when the power goes out, which is not a rare consequence of a great storm. Battery backup sump pump is much more affordable and risk-free solution.

  • Quick and easy installation

It’s a straightforward installation. You just hook up battery pump to your primary pump. There’s no annoying noise or unhealthy dust. You also don’t need to smash your precious walls. It only takes about an hour or so, and it’s easily a one-man job. In this way, it interrupts your household less and avoids a whole bunch of handymen goes around your house.

best battery for backup pumps

  • Completely automatic

If you properly install battery backup sump pump, it will charge automatically, so you don’t have to worry about it. It also turns on and off by itself, so you don’t have to run to your basement back and forward all the time to check it out. It also takes over when the primary clogs or if there’s any other mechanical issue.


How to Choose the Best Battery Backup Sump Pump

  • Battery

There are two most used types of batteries there on the market, Deep Cycle Marine Batteries and AGM Batteries. Deep Cycle Marine is also called wet cell batteries or marine or solar batteries, as well as lead-acid batteries. You can usually find them in old cars.

You have to add distilled water in them to save them drying out and preventing the damage. AGM batteries are maintenance free because they are completely sealed so you can set them up and forget all about them. There is no adding water whatsoever.

Also, new generations of AGM batteries have a double run time regarding their size, and they can be used for about five to seven years without replacement.

  • Pump construction

Pump construction is straightforward to choose because there are just two options, plastic or iron. Iron is an obvious choice in that case because it is more durable and much safer than a plastic one. Plastic is usually cheaper, but you get the quality you pay for.

  • Pumping output

If you all you have to do is to choose cast iron sump pump with AMG battery, the rest should be a piece of cake. But you also need to get the right sized pump. You have to watch for pumping capacity to make sure that it’s equal to your primary pump. It’s important because you don’t want to find yourself in a situation where there’s pouring rain outside and your backup pump can’t do all the work by itself if it has to.

  • Technology

Battery sump pump has two common types of batteries, which are AC/DC and regular DC. Systems for backing up batteries are going to switch to DC regulations when the AC power is not available or if the power fails for any matter. But if the DC power is still working, some of the pumps can use AC regular power directly without emptying the battery.

Batteries which use only DC power are going to just utilize battery power, so they are less expensive and affordable. But if you don’t want to be Thunderstruck, go with AC/DC. Pun intended.

There is also some new technology that enables you to connect your pump to your smartphone so it can text or email you in a case of any kind of pump emergency. These are very expensive, but they are way more practical and better investment than basement reconstruction after damage caused by the flood.

  • Float switch

Another reason why is an excellent choice for you to have battery sump pump is this: if your primary pump can’t handle the amount of water getting into your basement, a battery unit with float switch will do that for you.

The float switch is constructed to recognize when water is at a certain level so they can know when to turn on and clear it all out. Sump pump with battery backup system have precisely the same mechanism, and it will activate when it recognizes that the primary sump pump isn’t responding in a matter that it should.

If it’s installed above primary sump pump, it’ll double that power of primary sump pump and make it easier to keep your basement dry and undamaged, just like it supposed to be.


A battery powered backup can save you from having to spend thousands of dollars to rectify any damage done. It is an essential tool to protect your favorite room from any kind of damage. Big storms and floods are not rare, so you have to keep in mind what kind of destruction they make. Eventually, the most significant benefit of good battery backup sump pump is the peace of your heart and mind knowing that you have so much layer of protection.

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