Product Features for Top 9 Battery Backup Sump Pumps 

Are you wondering what features each of the 9 best selling battery backup sump pumps offers? Are you wondering what similarities or differences distinguish each of these backup  sump pumps?

Before we purchased our last backup sump pump, we compared the top 9 best selling sump pumps and their common features to help us in our decision making process.  We have included our comparison table below for your usage.  

To view the unique features and specifications for each of the top 9 best sellers, click on the Features Site Map on the right or scroll down the page.

Remember, investing in the right Backup Sump Pump for your situation is so important.  Your home deserves to be protected from water damage when those heavy rains come.  

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The links in the Battery Backup Sump Pump site map to the right will provide more details on the Top 9 Battery Backup Sump Pump Systems.

Top 9 Battery Backup 
Top 4 Water Powered Sump Pump Systems



#1 Wayne ESP25

Float type: vertical
Alarm sounds when regular sump pump stops
Automatically starts when existing sump pump fails
Runs on 12 volt DC battery power
Automatic controls keep battery charged
Requires a 40 Amp or 75-Amp Hr. Deep Cycle Battery
Pumps 3300 GPH @ 0 ft. ; 2300 GPH @ 10 ft.
Weight: 20 lbs.
Designed for easy installation without any major plumbing changes
Consumer warranty: 2 years

#2 Basement Watchdog Special BWSP

Housing material: reinforced thermoplastic

Float type: vertical
Has a dual float switch for redundancy
Float switch only needs to move 1/4" to activate the pump
Alarm sounds when regular sump pump stops or maintenance is required
Unique charging circuit limits the battery from overcharging
Automatically starts when existing sump pump fails
Controller monitors power conditions and battery life
Runs on 12 volt DC battery power
Provides 7.5 hours of continuous power Battery recharger recharges battery when power is restored
Battery recharger: 1.6 Amps
Equates to .28 HP
Discharge pipe diameter: 1 1/2"
Maximum particle size: .12"
Maximum particle hardness:.4 MOH
Pumps 2500 GPH @ 0 ft.; 1730 GPH @ 10 ft.;
Weight: 13 lbs.
Power cord length: 8 ft.
Can be used in sumps with water softener or laundry discharge
Designed for easy installation without any major plumbing changes
Consumer warranty: 2 years

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#3 Wayne ESP45

Housing material: cast iron construction
Finned motor housing helps reduce heat in the DC motor for increased life
Top suction design helps to prevent debris from entering the pump and prevents airlocks
Float type: vertical
Reliable reed float switch for automatic operation
Alarm sounds when regular sump pump stops
Automatically starts when existing sump pump fails
Runs on 24 volt DC battery power (two 12 volt batteries)
4 hour silence button with automatic reset
Battery recharger charges battery when power is restored
Pumps 3500 GPH @ 0 ft.; 2400 GPH @ 10 ft. 
Weight: 30 lbs.
Designed for easy installation without any major plumbing changes
Consumer warranty: 3 years


#4 Basement Watchdog Big Dog BWD12-120C

Housing material: reinforced thermoplastic
Float type: vertical
Has a dual float switch for redundancy
Float switch only needs to move 1/4" to activate the pump
Alarm sounds when regular sump pump stops or maintenance is required
Unique charging circuit limits the battery from overcharging
Automatically starts when existing sump pump fails
Controller monitors power conditions and battery life.
Provides 7.5 hours of continuous power
Can extend run time by hooking up 2 batteries in parallel; additional cables are required Runs on 120-volt AC power when power is on
Switches to 12-volt DC battery power when AC power fails
Battery recharger charges battery when power is restored
Battery recharger: 20 Amps
An indicator light lets you know battery charge remaining
Equates to 1/3 HP
Discharge pipe diameter: 1 1/2"
Maximum particle size: .12"
Maximum particle hardness:.4 MOH

Read more details about Watchdog BWD12-120C Big Dog

#5 Zoeller Sentry 507

Housing material: non corrosive thermoplastic
Float type: vertical
Runs on 12 volt DC battery power
Battery charger: 10 amps
Battery burnout and overcharge protection
LED lights for charge/battery and alarm status
Control box contains alarm
Pumps 1380 GPH @ 0 ft.; 900 GPH @ 10 ft.
No solid materials handling
Discharge port size: 1 1/2"
Built in check valve
Consumer warranty: 1 year

Read more details about Zoeller 507 Backup Pump


#6 StormPro 33AC

Housing material: non corrosive thermoplastic
Float type: adjustable vertical
Power head with built in 600W modified sine wave inverter
Battery charger: 5 amps
120 Amp-hour sealed AGM battery - non expandable
Battery burnout and overcharge protection
LED lights for charge/battery and alarm status
Control box contains alarm
Pumps 2200 GPH @ 0 ft.; 2100 GPH @ 10 ft. 
No solid materials handling
Pump base keeps pump off the bottom so it will not get clogged
Built-in check valve: no
Discharge port size: 1 1/2"
Consumer warranty: 1 year
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#7 Basement Watchdog Emergency BWE 
                                                       
Housing material: reinforced thermoplastic
Float type: vertical
Has a dual float switch for redundancy
Float switch only needs to move ?" to activate the pump
Alarm sounds when regular sump pump stops or maintenance is required
Unique charging circuit limits the battery from overcharging
Automatically starts when existing sump pump fails
Controller monitors power conditions and battery life
Runs on 12 volt DC battery power
Provides 6 hours of continuous run time
Battery recharger recharges battery when power is restored
Battery recharger: .4 Amps
Equates to .28 HP
Discharge pipe diameter: 1 1/2"
Pumps 2000 GPH @ 0 ft.; 1000 GPH @ 10 ft.
Weight: 9 lbs.
Power cord length: 8 ft.
Designed for easy installation without any major plumbing changes
Consumer warranty: 2 years
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#8 Little Giant SPBS-12

Housing material: non corrosive thermoplastic
Float type: verticle
Runs on 12 volt DC battery power
Battery charger: 2 amps
Alarm sound when battery not charging and backup pump is operating
Pumps 1360 GPH @ 0 ft.; 1000 GPH @ 10 ft.
Continuous run time: 7.5 hrs.
No solid materials handling
Discharge port size: 1 1/2"
Power cord length: 6 feet
Weight: 17.5 lbs
Consumer warranty: 1 year

#9 Wayne ESP15

Housing material: reinforced thermoplastic
Float type: vertical
Reliable reed float switch for automatic operation
Alarm sounds when regular sump pump stops
Automatically starts when existing sump pump fails
Runs on 12 volt DC battery power
Automatic controls keep battery charged
Requires a 40 Amp or 75-Amp Hr. Deep Cycle Battery
Pumps 1750 GPH @ 0 ft.; 720 GPH @ 10 ft.
Built in check valve
Weight: 15 lbs.
Designed for easy installation without any major plumbing changes
Has battery reverse signal to indicate improper installation
Consumer warranty: 1 year

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