Best Backup Battery For Sump Pumps (2022): Reviews & Comparison

Ensuring your sump pump has a reliable backup power source is crucial to protecting your home from flooding. While many sump pumps are powered by electricity, a power outage can leave your pump useless when you need it most. A backup battery can give your pump the power it needs to continue running in the event of an outage. However, finding the best backup battery for sump pump can be a challenge. With different options to choose from, it is important to know what to look for when selecting a backup battery.

Wayne ESP25 Upgraded Backup System

The Wayne ESP25 is an upgraded battery backup system designed for use in sump basins. It features a cast iron, one-third horsepower pump that can run for up to six hours on a single charge. The pump is efficient and fits in 14” diameter or larger sump basins, with no need to drill a weep hole.


What is the best backup battery for sump pump?

It is always ideal to have a backup plan for your sump pump. In the event that your power goes out or your main sump pump fails, a backup battery can save your basement from flooding.

There are many different types and brands on the market, so it is important to do your research to find the ベスト one for your needs. To help you with your purchase, here are some top battery backup for the sump pump.

Our Pick: Wayne ESP25 Upgraded Battery Backup System

Item Weight: 113.5 lbs

Product Dimensions: 17 x 10.5 x 14 inches LxWxH

Maximum Flow Rate: 2700 Gallons Per Hour

ベストフィーチャー: The Wayne ESP25 is a powerful cast-iron backup sump pump that can run for up to six hours on a single charge. With a proprietary battery available separately, this pump is perfect for larger sumps and can easily fit in basins with a diameter of 14" or larger.

Runner-Up: Basement Watchdog Special CONNECT Sump Pump

Item Weight: 5.4 Kilograms

Product Dimensions: 5 x 9 x 7.63 inches LxWxH

Maximum Flow Rate: 8.33 Gallons Per Minute

ベストフィーチャー: The ConNECT Sump Pump from Basement Watchdog is made to be simple to operate. When an issue is detected, the control panel illuminates with an alert and provides instructions for simple maintenance. For added peace of mind, a sensor checks the fluid levels. The entire package, including the controller, charger, dual float switch, pump, and battery box (battery is not included), makes it a one-stop-shop for all your sump-pit needs.

Basement Watchdog Special CONNECT Sump Pump

Basement Watchdog's Special CONNECT Sump Pump comes with an easy-to-use control panel that will light up with a warning and describes what to do for easy maintenance. A sensor also monitors battery fluid levels, giving you increased peace of mind. This pump kit includes the controller, charger, dual float switch, pump, and battery box - but the battery itself must be purchased separately. The compact pump can be installed even in small or narrow sump pits.


Budget Pick: Basement Watchdog Back-Up Sump Pump

Item Weight: 4.1 Kilograms

Product Dimensions: 4.5 x 8.5 x 6.5 inches LxWxH

Maximum Flow Rate: 1000 Gallons Per Minute

ベストフィーチャー: Basement Watchdog Sump Pump Backup is a lightweight and portable backup system that can be installed in any type of sump pit, even those that are small or narrow. This system is compatible with both wet cell and maintenance-free (AGM) batteries, making it a versatile choice for any home. This compact pump can be easily installed in tight spaces, and the lower price makes it an affordable option for homeowners.

Basement Watchdog Back-Up Sump Pump

Basement Watchdog's backup sump pump is designed to provide peace of mind during a power outage. The compact pump can be installed in even the smallest of sump pits, and is compatible with both wet cell and maintenance-free (AGM) batteries. The user-friendly control panel lights up with a warning and describes what to do for easy maintenance. The kit includes the controller, charger, dual float switch, pump, and battery box (battery sold separately).


Also Great: Superior Pump 92900 Backup Submersible Sump Pump

Item Weight: 12.5 lbs

Product Dimensions: 13 x 10 x 16.5 inches LxWxH

Maximum Flow Rate: 23 Gallons Per Minute

ベストフィーチャー: This backup submersible sump pump is perfect for emergencies or when your main pump fails. It has a clog-resistant impeller and a variable-sized discharge, so you can use it with any size sump pit. The tough thermoplastic construction and 10-foot cord length make it durable and easy to use.

Superior Pump 92900 Submersible Sump Pump

The Superior Pump 92900 backup submersible sump pump features a thermoplastic housing and an adjustable float switch for reliable operation. The pump’s variable-sized discharge allows you to adjust the water flow rate, making it ideal for use with sump pumps or other drainage applications. The pump is built to last, engineered with quality components, and is 100% factory tested.


How do I choose a sump pump battery backup?

There are a few things to keep in mind when choosing a sump pump battery backup. First, consider the size of your sump pit. You'll want a backup battery that can fit in your pit.

Next, think about how long you want the backup battery to last. Some backup will only last for a few hours, while others can last for days.

Finally, consider the price. Price ranges from a few hundred dollars to a few thousand. Choose the one that fits your budget.

With these things in mind, you're ready to choose the best backup battery for your sump pump.

How long do battery backups last for sump pumps?

How long the battery backups last will depend on a number of factors, including the type of battery, the quality of the battery, how often the battery is used, and how well the sump pump is maintained.

Generally speaking; however, most battery backups for sump pumps will last for several years before needing to be replaced. If you live in an area with frequent power outages, or if your sump pump is used frequently, you may need to replace the battery more often.

To get the most out of your battery backup, it is important to choose a high-quality battery and to keep it well maintained. Regularly check the battery for corrosion and clean it if necessary. Also, be sure to keep the battery charged; this can be done by plugging it into an outlet when the power is on or by using a solar charger.

By following these simple tips, you can extend the life of your battery backup and ensure that it will be there when you need it most.

How much does it cost to install a battery backup sump pump?

A battery backup sump pump costs around $200 to $500 on average. This includes the cost of the battery, charger, and installation. Some companies may charge more for parts and labor, while others will include everything in one price. The best way to get an accurate estimate is to contact a local plumber or sump pump, specialist.

Can you add battery backup to the existing sump pump?

The answer to this question may depend on the specific make and model of your existing sump pump. In general, however, it is possible to add battery backup to an existing sump pump by purchasing a battery backup unit and connecting it to the pump.

This can be done by following the instructions that come with the battery backup unit. Typically, you will need to connect the battery backup unit to a power outlet and then connect it to your sump pump using wires or cables. Some battery backup units also come with a float switch, which you will need to install in your sump pit. The float switch will activate the battery backup unit when the water level in the sump pit rises too high.

If you are not familiar with electrical wiring, it is best to hire a professional to install the battery backup unit for you.


Having a backup battery for the sump pump is a great idea. It will ensure that your sump pump can continue to operate even if there is a power outage. The top brands mentioned above all make great backup batteries for sump pumps. Shop around and compare features to find the best backup battery for your sump pump.

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