What happens when the power goes out and the primary sump pump is running? That’s where battery backup sump pumps come in. These pumps provide an extra layer of protection for your home by kicking in when your primary sump pump fails or when the power goes out.
So, how does a battery backup sump pump work? Essentially, it’s a secondary pump that is powered by a battery.
When your primary pump fails or when the power goes out, the backup pump will kick in and start pumping water out of your basement or crawlspace. This can help prevent flooding and water damage, even during a power outage.
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What is a Battery Backup Sump Pump?
If you live in an area that experiences frequent power outages or flooding, a battery backup sump pump can be a valuable investment.
A battery backup sump pump is a device that provides an additional layer of protection for your basement or crawl space in the event of a power outage or primary sump pump failure.
Zoeller 508-0006 Aquanot 508 ProPak53 Preassembled Sump Pump System with Battery Back-Up. Check The Price
This image does not show a backup sump pump, just the primary sump pump.However, to understand “How does a battery backup sump pump work?” you need to know how a basic sump pump system works. As the water level rises the float ball switch floats upwards which turns on the switch. When the water is pumped out of the sump pit the float lowers and the pump is shut off. See the image under the heading “Activation” for how the backup sump pump works. If the primary sump pump fails, then the backup sump pump will turn on. Image credit NDSU
Components of a Battery Backup Sump Pump
A battery backup sump pump consists of several components that work together to ensure that your basement or crawl space remains dry even during a power outage or primary sump pump failure.
The primary component of a battery backup sump pump is the battery itself. The battery is responsible for powering the backup pump in the event of a power outage or primary pump failure.
Most battery backup sump pumps use a deep cycle marine battery, which is designed to provide a steady stream of power over an extended period of time.
In addition to the battery, a battery backup sump pump also includes a battery-powered pump, which is designed to activate when the primary pump fails or when the power goes out.
Shown below is the high quality and extremely popular Renogy Deep Cycle AGM Battery 12 Volt 100Ah.
- 【Warranty】2-year material and workmanship warranty guarantee.
- 【Maintenance Free & Safe to Use】No acid leakage, no water refilling, and no harmful hydrogen gas. Manufactured with thick absorbent glass mat (AGM) separators and advanced valve-regulated technology, Renogy Deep Cycle AGM Batteries save you from acid leakage and frequent maintenance.
- 【Better Performance at Extreme Temp】The improved electrolyte formula ensures stable battery capacity and outstanding discharge performance from 5℉ (-15℃) to 122℉ (50℃).
- 【Longer Shelf Life】No need to recharge the battery frequently when not in use. Made of high-purity materials, Renogy Deep Cycle AGM Batteries reduce the monthly self-discharge rate below 3% at 77℉ (25℃), which is 5 times lower than their flooded counterparts.
- 【Outstanding Discharge Performance】Proprietary quinary alloy plates and exclusively treated plate grids enable low internal resistance and high discharge currents of up to 10 times the battery-rated capacity. This means that Renogy AGM batteries can power home appliances with high current ratings.
The backup pump is typically smaller and less powerful than the primary pump, but it is still capable of removing water from your basement or crawl space.
Another important component of a battery backup sump pump is the charger.
The charger is responsible for keeping the battery fully charged and ready to go in the event of a power outage.
Most chargers are designed to automatically switch to battery power when the power goes out, ensuring that the battery is always fully charged and ready to go.
Shown in the video below is THE BASEMENT WATCHDOG Battery Backup Sump Pump System with Smart WiFi Capable Monitoring Controller and 20 Amp Charger. Pumps 3,500 GPH at 0 ft. and 2,200 GPH at 10 ft. Model No. BWD12-120 Big Dog CONNECT.
- Pumps 2,200 GPH at 10 ft. lift and 3,500 GPH at 0 ft. lift
- USB port allows for connection to a Basement Watchdog WiFi module (BW-WiFi – sold separately), allowing you to receive real time alerts while away from home (text, email, or through the Basement Watchdog App)
- Remote terminal allows the ability to connect with a home security system, or other device
- User-friendly control panel provides 24 hour a day monitoring, detects irregularities, sounds an alarm, and pinpoints problems and solutions
- Powerful 20 amp multistage smart charger charges the battery quickly and shuts off completely to prolong battery life
How Does a Battery Backup Sump Pump Work?
When the main sump pump fails to operate, the battery backup sump pump takes over. The battery is the power source for the backup sump pump.
There are different types of batteries that can be used for this purpose, such as lead-acid and lithium-ion batteries. The battery backup sump pump is connected to the battery, which provides the required power to run the backup pump.
Add this backup system to your existing sump pump. Zoeller 508-0014 Aquanot Fit 12-volt DC Battery Back-up Sump Pump System with Built-in Wi-Fi for Z Control Connectivity
The backup sump pump is activated when the main sump pump fails to operate. The activation process begins with the float switch. When the water level in the sump pit rises, it activates the float switch, which triggers the backup pump to start operating. The float switch is connected to the backup pump, and it is responsible for detecting the water level in the sump pit.
Once the backup sump pump is activated, it starts operating. The operation process begins with the check valve. The check valve prevents water from flowing back into the sump pit, ensuring that the water is discharged outside. The backup sump pump then suctions the water up and discharges it outside the house. The backup sump pump continues to operate until the main sump pump is repaired or replaced.
In summary, a battery backup sump pump is a device that provides an extra layer of protection against basement flooding. It is connected to a battery, which provides the required power to operate the backup pump. When the main pump fails to operate, the float switch activates the backup pump, which then suctions the water up and discharges it outside the house.
Benefits of a Battery Backup Sump Pump
If you live in an area that experiences heavy rainfall or flooding, a battery backup sump pump can provide extra protection for your basement. Here are some of the benefits:
Protection Against Power Outages
One of the main benefits of a battery backup sump pump is that it can continue to operate even during a power outage.
This is because it is powered by a battery, which means it can continue to pump water out of your basement even if the electricity goes out.
This is especially important if you live in an area that experiences frequent power outages due to severe weather.
Shown below is THE BASEMENT WATCHDOG Combo Model CITE-33 1/3 HP Primary and Battery Backup Sump Pump System with 24 Hour a Day Monitoring Controller.
- Pre-assembled system allowing for easy installation with little or no plumbing knowledge necessary
- 1/3 HP energy efficient permanent split capacitor (PSC) primary pump can save money on your electric bills
- Primary pump capacity 3,100 GPH at a 10 ft. lift and 3,720 GPH at 0 ft. lift
- Backup system capacity 1,000 GPH at 10 ft. lift and 2,000 GPH at 0 ft. lift
- Includes emergency battery backup sump pump system with 24 hour a day monitoring controller
Extra Protection Against Flooding
A battery backup sump pump can also provide extra protection against flooding. This is because it can work in tandem with your primary sump pump to ensure that water is pumped out of your basement as quickly as possible. If your primary sump pump fails or becomes overwhelmed, the battery backup sump pump will kick in to ensure that your basement remains dry.
Peace of Mind
Finally, a battery backup sump pump can provide you with peace of mind. Knowing that your basement is protected against flooding, even during a power outage, can help you sleep better at night. It can also give you the confidence to leave your home during severe weather, knowing that your basement is protected.
Overall, a battery backup sump pump is a worthwhile investment for any homeowner who wants to protect their basement against flooding. It provides extra protection during power outages, extra protection against flooding, and peace of mind.
Installation and Maintenance
Installing a battery backup sump pump is a relatively simple process that can be done by following a few basic steps.
First, you need to determine the location of the backup sump pump. It should be installed in the same sump pit as the primary sump pump.
Next, you need to install the battery. It is important to choose the right type of battery for your backup sump pump. A deep-cycle marine battery is the most common type of battery used for backup sump pumps. The battery should be installed in a location that is easily accessible for maintenance.
Once the battery is installed, you need to install the backup sump pump. The backup sump pump should be connected to the discharge pipe and the check valve, just like the primary sump pump.
It is important to follow the manufacturer’s instructions when installing the backup sump pump.
Shown below is the very popuilar and highly rated Wayne ESP25 Upgraded 12-Volt Battery Backup System.
- Indoor Use Only – This 12 Volt WAYNE basement battery backup sump pump is perfect to keep your basement dry during heavy water flow when you lose electricity. Whether it’s rain, snow melting, etc. WAYNE model ESP25n can keep your basement dry.
- Back-Up Ready – ESP25N will pump up to 2,700 GPH and remove/evacuate/expel/get rid of up to 10,000 gallons on a single battery backup charge. WAYNE WSB1275 75 AH Battery is required for back-up but not included.
- Efficient Design – Fits in 14” diameter or larger sump basins, with no need to drill a weep hole
- Additional Features – Epoxy-coated steel housing with a cast-iron base. Corrosion-resistant thermoplastic impeller for maximum water flow. Protective battery case includes LED display and an audible alarm to let you know if there’s a problem.
- Quality You Deserve – Proudly assembled in the USA for quality you can trust. Warrantied for 2 years for dependable, efficient, & ultra-quiet performance.
Maintaining your battery backup sump pump is important to ensure that it will work properly when you need it. Here are a few maintenance requirements to keep in mind:
- Check the battery regularly to make sure it is fully charged. Most batteries will need to be charged every 3-4 months. Fortunately battery backup pump controllers will keep the battery charged automatically. The controller will also alarm when the battery has lost it’s charge.
- Test the backup sump pump regularly to make sure it is working properly. You can do this by pouring water into the sump pit and making sure the backup sump pump turns on.
- Clean the sump pit and the backup sump pump regularly (6 to 12 monyhs) to prevent dirt and debris from clogging the pump.
- Replace the battery every 3-5 years, depending on the manufacturer’s recommendations.
By following these maintenance requirements, you can ensure that your battery backup sump pump will be ready to work when you need it.
The first time I helped to install a drain tile and basement sump pump system was 1978.
Since then I have worked for a city water utility where I worked with and maintained pumps.
My rental properties and personal homes all needed sump pumps.
As a modular home dealer/builder, those new homes needed sump pumps.
I put that experience to good use by providing reliable, useful, and practical advice on buying, using, and maintaining sump pumps.