Best Battery Backup for a Sump Pump

Having the best battery backup for a sump pump is critical if your sump pump fails or is overwhelmed by increased water flow. A battery backup in your basement or crawl space can save you thousands of dollars of flood damage.

You can see my top recommended battery back up sump pump: the Basement Watchdog Battery Back Up on Amazon.

Yes, it’s important to have a sump pump to prevent flood water from ruining your floors, walls, furniture or appliances. But if there is a power blackout, or your pump fails, or your pump is overwhelmed, you still need the best battery backup for a sump pump to prevent a flood.

I can strongly recommend the Basement Watchdog BWE Emergency Back-up Sump pump on Amazon.

When your primary sump pump fails, is overwhelmed, clogs or wears out, the Basement Watchdog BWE  automatically starts up to pump up to 1,000 gallons per hour (GPH) at 10 ft lift and 2,000 GPH at 0 feet lift! It stands watch over your basement to make sure it doesn’t become a swimming pool.

What I REALLY love about the Basement Watchdog is that it has a unique LED control panel that actually tells you what’s wrong with your primary sump pump – and what to do to fix it! Genius.

And you can check Amazon’s price on the Basement Watchdog.

If you’re not home, or you’re asleep, and can’t hear your primary sump pump alarm, a sump pump backup will still save you.

Don't Forget a Sump Pump Alarm!

One thing I know for sure: it’s very important to have a good sump pump alarm so you’re alerted to any pumping problems or issues, before floodwater has a chance to do its damage.  If you don't buy a battery backup for a sump pump, you really need a sump pump alarm!

Glentronics Basement Watchdog Water Sensor and Alarm

You can check out my top sump pump alarm recommendation: The Glentronics Basement Watchdog Water Sensor and Alarm on Amazon. It's a great early warning system that only needs a 9 volt battery.

It detects unwanted water at only 1/32" deep, before damage starts,  and it has a loud 110Db alarm.

And you can check Amazon's price on the Glentronics Basement Watchdog Water Sensor and Alarm.

View or download the Glentronics Basement Watchdog Water Sensor and Alarm manual.

Some new sump pumps on the market have a sump pump alarm built-in, which is usually a loud, audible alarm.

The loud pump alarm will let you know if your pump is failing, is not working, your water level has risen too high - or if your electricity is out.  And you’ll have time to fix the issue(s) before you have to start wading around in basement water.

Best Sump Pump Battery vs Water Powered Sump Pump Backup

As you're shopping around for the best sump pump battery backup system, I wanted to let you know that you have another backup option for your sump pump system: a water powered sump pump.

Yes, if you want to have a back up system for your sump pump, in case it fails or your lose power, a water powered sump pump is a great option if you have municipal water. (I just want to tell you, upfront, if you have well water, a water powered sump pump is not an option for you.)

And you can see my top water powered sump pump recommendation: the Liberty Pump SJ10 on Amazon.

A lot of homeowners swear by a water powered sump pump backup system, instead of the best battery backup sump pump system.

Why? Because a water powered sump pump is powered by the PSI/Flow of your municipal water system. You don't need any electricity to run a water powered sump pump! And you'll never have to deal with batteries, chargers, etc.

A water powered sump pump backup turns on automatically if your existing sump pump system becomes overwhelmed & can't keep up with incoming water. Or if your primary sump pump fails - or stops because you lose power!

I highly recommend the Liberty Pumps SJ10 water powered backup sump pump because it has a compact design and it's very efficient:  it discharges 2 gallon of sump water for every gallon of municipal water used!

The Liberty Pumps SJ10 accepts 20 PSI to 100 PSI inlet supply pressure, which means it works with almost all city water pressure levels and it fits all standard 1 1/2" discharge lines.  And an adjustable stainless steel hose clamp is included for easy mounting/installation.

And you can check Amazon's price on the Liberty Pumps SJ10 water powered backup sump pump.


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Do I really need a battery backup for sump pump?

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Best Sump Pump Battery versus Water Powered Sump Pump


While you're choosing a battery back up for sump pumps......

I wanted to remind you that many of my readers also replace their sump pump check valve at the same time they install their battery backup for an existing sump pump.

When you install a new battery backup for a sump pump, its really easy to install a quiet sump pump check valve, so you won't be annoyed with water hammer or water thud noise while your sump pump, or back up sump pump, is working.

I wanted to review this new type of sump pump check valve: the Brady Clear Quiet Check Valve on Amazon.

You can see that the Brady check valve has a clear display which is incredibly handy for viewing or testing the valve function. Really, being able to check your valve, without taking it off the discharge pipe, is genius, in my opinion.

And this Brady check valve is very quiet - no more loud thuds or banging sounds all over your house.

You can install the Brady clear quiet check valve horizontally and vertically!

Check Amazon's price on the Brady clear quiet check valve.

Do I Need a Battery Backup for Existing Sump Pump?

The #1 reason you need the best battery backup for an existing sump pump is in the event of a power outage. If your power goes out during a big storm, or your outlet/circuit shorts are overloaded, the loss of electricity will be the reason for your sump pump not working.

The #2 reason why you need a battery back up for a sump pump is that your primary pump may become overwhelmed if you have a lot of deep snow melt or heavy rains.  In this case, even if you have electrical power, your main sump pump will not be able to keep up with the increased water flow – and you’ll have flooding.

And you can see my top recommended battery back up sump pump: the Basement Watchdog BWE Battery Back Up on Amazon.

If you need answers to technical questions about the Basement Watchdog, you can visit their website here.

And let’s face it, eventually, every sump pump dies, wears out or clogs. Simple mechanical failure issues happen. No matter how well you service it, a sump pump will eventually wear out and fail.  And the battery backup for the existing sump pump will kick on, to keep you dry, until you’re able to replace your primary pump. Even if you don’t hear the sump pump alarm go off.

In my opinion, a backup sump pump is a very inexpensive way to guard against a big water damage repair bill. Basically, a battery backup for existing sump pumps is an insurance policy for when your sump pumps not working.

But what if you’re not home, or can’t hear, when your sump alarm goes off? Then you’ll want to look for a sump pump alarm that also sends you a message on your landline and/or text!  Such a great idea. There are some great new pump alarm systems that do this for you, so you’ll never be caught off guard. And many of the best battery back ups for sump pumps also have these landline and text message features.

More Tips for Choosing the Best Battery Backup for a Sump Pump

tips for buying a sump pump battery back up

When you're comparing and choosing a battery backup for existing sump pumps, you'll see that these backup systems use either old-style, regular deep cycle marine batteries or AGM (absorbed glass mat) marine batteries.

Regular marine batteries are the older style of battery and they do require regular servicing: you'll have to consistently add water to them.

AGM marine batteries are the newest generator of batteries - and you don't need to add water to them. Generally speaking, AGM batteries also run about 50% longer than old school marine batteries.

You can click here if you'd like to read more tips on installing a battery backup system for a sump pump.

Would you like see my recommendations for the best sump pumps for homeowners

You can read my tips on choosing the top sump pump for you.

Need sump pump repair? You’ll want to check out my top sump pump repair and troubleshooting tips.

If you’d like to see a handy chart of my top rated sump pumps and sump pump battery back up recommendations, click here.

Wondering what’s a sump pump and what it will do for you?

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Now you're ready to choose the best battery backup for a sump pump.