Adding A Battery Backup To Sump Pump

When the snow thaws, it is usually a welcoming sign for most homeowners but that is only, if the process happens smoothly. The extra pressure of the snow and rain may put pressure on your sump pump. But what if your power supply fails??

While searching for an alternative for water restoration in case of power failure, many would suggest a sump pump with battery backup, but wait, adding a battery to your existing sump pump could be a better option. Getting the whole new unit is costly while it renders your existing sump pump out of operation.

It ain’t that tricky to add a sump pump backup power, the battery could be mounted on a wall and provide power to your pump. I explain a simple step by step procedure to connect a battery or a UPS to your sump pump. Also reviewed below, the best sump pump batteries in case you chose to attach one yourself.

Get Straight To the Point Down!

5 Best Battery Backups For Existing Sump Pump

Best Sump Pump Battery - A Quick Glimpse

     ★ BEST BUDGET PICK ★       

Renogy 1000W 12V

Renogy 1000W

  • Automatic

  • Quietly Operated

  • High Capacity

     ★ BEST OVERALL ★       



  • Pure Sign Wave Inverter

  • Remote Monitoring Panel

  • Integrated 4 Stage Charger

     ★ PREMIUM CHOICE ★       


  • Highly Durable

  • Has 240 Split Phase

  • Heavy Duty & Weighs 84 Lbs

Why These Batteries Stack Up Against The Competition?

Why AIMS 12V

This marine-coated and protected backup battery for sump pump offers 300% surge capability and a 3750-watt surge for 20 seconds at a time.At a weight that is less than 40 pounds, it is easy to move from one room to another and and it offers continuous clean power 24 hours a day. Lets see a full working video of this device.

Other Uses:

In addition to sump pumps, this battery can also be used for medical equipment, tools, and appliances up to 10 AC amps. It is perfect for startups for items such as fans, computers and refrigerators.


The remote panel is available in either LED or LCD lighting and it even comes with a multi-stage smart charger and 35A AC input cable for your convenience.


  • Is easy to set up and operate.

  • Accommodates a variety of items and appliances.

  • Is very affordable.


  • It doesn’t work well in items such as boats or RVs.

  • The power cord is only four feet long.

  • The instruction manual doesn’t give a lot of details on installation.

     ★ Top Pick       

Why AIMS 24V

One of the things that makes this charger so unique is the protection it offers, including protections for high or low voltage, overload, short circuit, and much more. With a powerful 6000-watt continuous capacity, it can jump start many devices because of its 20-second, 18,000-watt surge. Here’s a complete unboxing video with expert comments.

Other Uses:

It is a lightweight sump pump battery that can also be used for work trucks, RVs, and boats and it even comes with both off-grid and backup power.


Its features include a charge current control dial, auto gen start, and a battery temp sensor, among others. You only need one set of cables to operate it and there is even an optional remote available. It also accommodates a variety of battery technologies, including lithium and seven others.This is a reliable generator that you’ll be able to use for many years to come and it comes with a great warranty


  • A smart battery charger with many different uses.

  • A low-frequency charger with pure sine clean power.

  • A reputable company that stands behind its products.


  • Some complaints about the weight being different than in the description.

  • Some complaints about it not working for very long.

  • Some complaints about poor customer service.

Why Renogy 12-Volt

It includes a power saver mode for greater efficiency and lower operation costs and it has a maximum bypass current of 30A. It is also available in both 1000- and 3000-watt options.This is a high-quality, dependable battery charger that is easy to set up and even easier to use.

Other Uses:

This is also a multipurpose battery charger that can charge items such as computers, sump pumps, and much more. Check out the first hand review by a real user.


With both AC and DC inputs, the Renogy 12-volt charger is a four-stage charger with eight different preset battery voltages. It is compatible with numerous battery types including AGM, GEL, flooded lead acid, calcium, and sealed lead acid batteries. Its remote monitoring panel lets you get all of your data in a single source and it is built to last for many years to come.


  • Multipurpose device that charges numerous items.

  • Nice bright display that is easy to read and convenient.

  • Ability to accommodate large items such as RVs and boats.


  • Some complaints about it breaking shortly after purchase.

  • Some complaints about insufficient instructions.

  • Some complaints about poor customer service.

     ★ Top Pick       


It provides 5000 watts of continuous power and 10,000 watts of peak power. You also get safety protections that include overload, short circuit, low or high voltage, overheat, and polarity reverse protection, to name a few. Don’t forget to take a quick look at accessories that comes along with this package.

Since it is only 22 pounds, you can easily move it from one area to another. The 15-foot cable that comes with the charger means that it can be plugged in almost anywhere, making this a very convenient and versatile device to have.

Other Uses:

This is a multipurpose charger that can accommodate everything from RVs to trucks, sump pumps, and solar systems.


Its features include four AC outlets, cable, and a 2.4A USB port, among others. It is also made out of durable aluminum alloy and comes complete with an instruction manual, four pairs of cables, an inverter, and a remote control.The auto-start function and soft-start technology is something that you’ll get used to rather quickly.


  • Multiple protections that make it a very safe device to own.

  • Heavy-duty materials that last.

  • Ability to be used for numerous devices and appliances.


  • Some complaints about it not working very long.

  • Some complaints about the inverter not working properly.

  • Some complaints about it being too weak for proper use.


A 4000-watt inverter offering 8000 watts of peak power. It is light weight of 24 pounds means that you can easily take it with you wherever you need to go.

Other Uses:

This unit has many applications that include boats, RVs, sump pumps, and even power failure emergencies. Click here to know how many people recently bought this product.


Its many features include four AC outlets, full safety protections for short circuits and many others, and a convenient remote control that makes operating it much easier on your part.

Its isolated input/output design and soft-start technology are just two features that make this a smart unit to buy.

The GIANDEL battery charger can accommodate items both inside and outdoors. It also comes with a 15-foot power cord that makes it easy to hook it up anywhere in your home. The LED display means that the numbers are always clear and easy to read.


  • Is a multipurpose charger with numerous uses.

  • Comes complete with everything you need to start using it immediately.

  • Works with a variety of battery types.


  • Some complaints about it not working for very long.

  • Some complaints about slow customer service.

  • Some complaints about the LED numbers being inaccurate.

How We Rated the Backup Sump Pump Batteries


Irrespective of the above-mentioned batteries reviewed for Sump Pump Batteries, the below-mentioned points must be an explored before making a purchase so that you don’t despair later


Water or battery powered sump pumps can reach up to 2000 cycles on a fully charged 12V/75Amps battery and can provide for approximately 5 to 6 hours continuous operation. These types of sump pumps can work automatically without being turned off or for up to 2 days.


The size of the sump or the basement remains the prime factor along with the existing sump pump power which ultimately requires to be powered. Sump pump batteries are available up to 5000 Watts which can generate a peak load in case of power failure. Most Sump Pump used in residential properties has up to 1 HP Power. So a standard 12 V battery is enough to power them up.
In case of limited space in your basement sump, you can go for a pump with battery backup.


AGM (Absorbent Glass Mat) batteries are the most desirable batteries to consider if you’re working with the latest sump pump batteries. Other alternatives like Wet Cell and Marine batteries require a contact handling for checkups and are also prone to exploding. While the AGM batteries are completely maintenance-free and are quite long-lasting without requiring any constant attention.


In case of back-to-back outages, these pumps are highly effective but one must pay attention to the voltage to make sure that the battery is charged in time and doesn’t take too long. Many people also install a solar panel to charge the backup battery, though it’s a costly arrangement but are highly effective, easy to main and cost-effective in the long run.

All Other Battery Backup Options to consider for your sump pump

Sump PumpFortunately, there are different options available which you can use to keep your sump pump problem under control. There are two types of battery back -up systems available –DC and AC/DC. These battery back-up systems switch to DC power as soon as the AC power is cut off.

However when AC is on your pump functions as normal. Apart from that, you should also consider which kind of battery you would want to incorporate. You will find deep cycle maintenance free batteries as a great alternative. The batteries would be a water powered sump pump battery that need water at regular intervals that you must keep adding.

Sump Pump Inverters Or UPS For Sump Pump

  • The purpose of the inverter is threefold. First, it keeps the battery charged at all times so that any kind of exigency can be handled. Second, is being able to sense when the power is missing and quickly revert to the inverter setting. Lastly, it converts the power stored in your batteries from DC to AC and proceeds further.
  • Though inverter and UPS work in the same way using the latter is not sensible in such a condition. The battery in a UPS cannot work for so long and that is the biggest disadvantage it can have. UPS systems have small battery chargers and thus its processes are inhibited.
  • Apart from that, an inverter offers more flexibility in comparison to a UPS system. Being inexpensive and easy to assemble, the inverter can easily be expanded in the future if required.

How to Install Battery Backup to Your Existing Pump Pump

how to install battery backup to existing sump pump

It is fairly easy to set up your Battery Back -up Sump Pump  and you can do so in three easy steps.

  • Mounting the unit- You must mount the battery back-up at a wall-mount and a considerable distance from the AC outlet. The battery needs to be placed less than 4 feet from the pump. Make sure that the battery is encased in a strong battery box that would stand the impact of wear and tear.
  • Make the connections- After mounting, check if the main point is in off position. Connect that battery cables as mentioned in the manual. You must plug the pump into the AC outlet and then turn its power on.
  • Test installation- Lastly, check whether the installation has been done correctly. Cycle the pump to see if it is operating as per the specifications. You should remove the power cord to see if the back -up has been connected correctly. Cycle the pump again to see if the unit has been connected and is using the backup power.


Q1. What Happens When Your Sump Pump Loses Power?

When there is no power, your sump pump would not function at all. That means there would be no pumping action happening and all the snow and rain would slowly start piling up. This means that once thawing happens, there could be flooding in your home and areas around it. If you are around to fix the situation then things are fine. However, if you are not at home you can expect chaos and a worse situation when you come back.

Q2. Can you count on your sump pump?

A sump pump’s basic purpose is to keep pumping the snow and rain away. In most situations, it keeps functioning as per the specifications. However, when power is not there, any sump pump can breakdown and stop doing the needful. To handle this situation, a battery back- up is generally advised.

Q3. What causes primary pumps to fail?

A sump pump can face many issues during operations. A water-powered sump pump may be subjected to clogging and that can be a dangerous possibility. Its discharge lines could also get jammed or frozen causing the pump to stop working properly. Apart from that, if your basement has already got full of water the sump pump would not be able to handle the pressure and cause things to fail.

Q4. Back-Up Options For Existing Sump Pump?

You can get a battery back- up for an existing sump pump. These are easily available at hardware stores. Apart from that, an inverter can also be a suitable option as it handles even the toughest of breakdowns with ease. Moreover, you can assemble it quickly and even increase its loading capacity if need be. UPS is mostly not suitable for such a condition as it is unable to handle the load requirement.


When it is snowing your sump pump keeps the situation under control. However, when a power outage happens the sump pump would not function and get a battery back- up then is the most obvious and sensible thing to do. Look around for the most suitable options that are available ensuring that it can handle the pressure of your house. Mostly a high capacity inverter back-up can take care of such issues, you just need to find which product is the best suited for you.

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