Best Battery Backup for Existing Sump Pump in 2025
Updated on July 2025
#1
Recommended
Free Shipping
- 12V battery backup system
- compatible with any existing primary sump pump
- supports pumping up to 2,700 gallons per hour
- ideal for preventing water damage during power outages
- provides reliable performance in emergencies
- ensures continuous operation of sump pump
Read More
- 12V battery backup system
- compatible with any existing primary sump pump
- supports pumping up to 2,700 gallons per hour
- ideal for preventing water damage during power outages
- provides reliable performance in emergencies
- ensures continuous operation of sump pump
#2
Value for Money
20% Off
Free Shipping
- Designed specifically for basement flood protection with automatic switch to battery power during outages, ensuring continuous operation during severe weather conditions.
- Offers up to 1500 Watts of output power and supports both single and double pump systems, making it efficient for managing basement sewage.
- Equipped with a 20A built-in battery charger that supports fast and trickle charging for deep-cycle batteries, with overcharge protection to prolong battery life.
- Features an LCD display to monitor battery and pump status, along with a built-in cooling system, overload protection, and additional safety mechanisms to enhance durability and safety.
- Simple installation without extensive wiring needed; supports flat or wall mounting for versatile setup options.
Read More
- Designed specifically for basement flood protection with automatic switch to battery power during outages, ensuring continuous operation during severe weather conditions.
- Offers up to 1500 Watts of output power and supports both single and double pump systems, making it efficient for managing basement sewage.
- Equipped with a 20A built-in battery charger that supports fast and trickle charging for deep-cycle batteries, with overcharge protection to prolong battery life.
Read More
#3
20% Off
Free Shipping
- 2000W output and dual outlets to support two sump pumps simultaneously, ensuring operation during power outages.
- High-definition LCD screen and LED indicators provide real-time monitoring of voltage, power, and battery levels.
- 3-Pin plug design allows for quick and easy installation, minimizing wiring errors and enhancing safety.
- Multi-layered security features offer protection against overloads, short circuits, overcharging, overheating, and more.
- Rapid charging capability with a 20A current, fully charging a 100AH battery in about 5 hours.
Read More
- 2000W output and dual outlets to support two sump pumps simultaneously, ensuring operation during power outages.
- High-definition LCD screen and LED indicators provide real-time monitoring of voltage, power, and battery levels.
- 3-Pin plug design allows for quick and easy installation, minimizing wiring errors and enhancing safety.
- Multi-layered security features offer protection against overloads, short circuits, overcharging, overheating, and more.
Read More
#4
Free Shipping
- Backup system for power outages, with 2000 watts output and 3 AC outputs for simultaneous sump pump operation.
- High-definition LCD remote control displays voltage, power, and battery charge status; includes multiple output options and built-in cooling system.
- Adjustable input voltage (9.5V-11V) for better compatibility with lithium batteries, enhancing battery life and reducing consumption.
- Simple installation with no additional wiring; offers multiple mounting options to suit various setups.
- Includes inverter, cables, remote control, and user manual, with a 24-month warranty for added assurance.
Read More
- Backup system for power outages, with 2000 watts output and 3 AC outputs for simultaneous sump pump operation.
- High-definition LCD remote control displays voltage, power, and battery charge status; includes multiple output options and built-in cooling system.
- Adjustable input voltage (9.5V-11V) for better compatibility with lithium batteries, enhancing battery life and reducing consumption.
Read More
#5
Free Shipping
- No maintenance required; no need for battery fluid or distilled water.
- Provides up to 40 hours of backup power for Basement Watchdog Big Dog (BWD12-120C+) systems.
- Offers up to 80 hours of backup power for Basement Watchdog Emergency (BWE) and Combination sump pump systems (DFK961, CITE-33).
- Delivers up to 48 hours of backup for Basement Watchdog Special + (BWSP+) and Combination systems (BW4000, CITS-50).
- Supports intermittent operation of multiple Basement Watchdog sump pump systems for several days.
- Compatibility note: Older models with Remote Terminal from before 2014 are compatible; non-compatible systems may have false alarms.
Read More
- No maintenance required; no need for battery fluid or distilled water.
- Provides up to 40 hours of backup power for Basement Watchdog Big Dog (BWD12-120C+) systems.
- Offers up to 80 hours of backup power for Basement Watchdog Emergency (BWE) and Combination sump pump systems (DFK961, CITE-33).
- Delivers up to 48 hours of backup for Basement Watchdog Special + (BWSP+) and Combination systems (BW4000, CITS-50).
Read More
#6
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/41QwOPf-mFL._SL320_.jpg)
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/417jnTN0C1L._SL320_.jpg)
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/41u5THutFSL._SL320_.jpg)
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/31PrlR0y-AL._SL320_.jpg)
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/41QwOPf-mFL._SL100_.jpg){kind=small}
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/417jnTN0C1L._SL100_.jpg)
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/41u5THutFSL._SL100_.jpg)
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/31PrlR0y-AL._SL100_.jpg)
9% Off
Free Shipping
- Suitable for indoor use, the 1/2 HP WAYNE sump system is designed to manage heavy water flow in basements, ensuring dryness during rain or snowmelts even during power outages.
- The WSS30VN can pump up to 5,100 GPH and remove 10,000 gallons on a single battery charge; requires WAYNE WSB1275 75 AH Battery (not included) for backup operation.
- Preassembled for easy installation, this sump pump can be set up in 15 minutes in sump basins with a diameter of 16 inches or more, without the need for drilling.
- Tested for 1 million cycles, the system is built for durability and comes with an 8-foot SJTW power cord for added convenience.
- Assembled in the USA, the pump is backed by a 3-year warranty, ensuring reliable and quiet performance.
Read More
- Suitable for indoor use, the 1/2 HP WAYNE sump system is designed to manage heavy water flow in basements, ensuring dryness during rain or snowmelts even during power outages.
- The WSS30VN can pump up to 5,100 GPH and remove 10,000 gallons on a single battery charge; requires WAYNE WSB1275 75 AH Battery (not included) for backup operation.
- Preassembled for easy installation, this sump pump can be set up in 15 minutes in sump basins with a diameter of 16 inches or more, without the need for drilling.
Read More
#7
8% Off
Free Shipping
- 12V non-corrosive, efficient pump design
- Built-in check valve for improved functionality
- Quick disconnect feature for easy discharge
- Durable aluminum seal pocket and cooling plate
- Handcrafted and rigorously tested in the USA
Read More
- 12V non-corrosive, efficient pump design
- Built-in check valve for improved functionality
- Quick disconnect feature for easy discharge
- Durable aluminum seal pocket and cooling plate
- Handcrafted and rigorously tested in the USA
#8
Free Shipping
- 1/2 HP primary sump pump can handle up to 5,200 GPH, while backup pump removes water at 2,700 GPH.
- Integrated battery backup activates during power outages to maintain dry conditions in basements or crawlspaces.
- User-friendly installation with a metal connector and volute top suction design for efficient and quiet operation.
- Dual check valves prevent backflow, ensuring safe and reliable one-way water flow.
- Vertical float switch tested for over 1 million cycles, guaranteeing protection against water damage.
Read More
- 1/2 HP primary sump pump can handle up to 5,200 GPH, while backup pump removes water at 2,700 GPH.
- Integrated battery backup activates during power outages to maintain dry conditions in basements or crawlspaces.
- User-friendly installation with a metal connector and volute top suction design for efficient and quiet operation.
- Dual check valves prevent backflow, ensuring safe and reliable one-way water flow.
Read More
#9
27% Off
Free Shipping
- Sump pump backup system has a power output of up to 1500 watts and a current output of 13.6 amps, suitable for handling basement wastewater.
- Equipped with a built-in 20A charger, supporting fast and trickle charging, with overcharge protection to enhance battery longevity.
- Installation requires no extra wiring; simply assemble AC and DC cables, and can be mounted either flat or on a wall.
- Features an LCD display for monitoring battery charging status, along with a built-in cooling system and various safety protections against overheating and short circuits.
- Automatically switches to battery power during outages, ensuring continuous power supply during storms or emergencies.
Read More
- Sump pump backup system has a power output of up to 1500 watts and a current output of 13.6 amps, suitable for handling basement wastewater.
- Equipped with a built-in 20A charger, supporting fast and trickle charging, with overcharge protection to enhance battery longevity.
- Installation requires no extra wiring; simply assemble AC and DC cables, and can be mounted either flat or on a wall.
Read More
#10
Free Shipping
- BATTERY BACK-UP SYSTEM: includes 10 amp battery charger, 2500 GPH 12-volt backup pump, diaphragm switch, pipe fittings, and battery box (battery and primary pump not included)
- PEACE OF MIND: if your primary pump should fail, or if there is a power outage, the Little Giant SPBS-10HF will kick in preventing a flooded basement
- FEATURES: controller/charger monitors the battery condition and charges the battery as required; microprocessor control charging unit maintains a maximum battery charge
- FEATURES: built-in overcharge protection: prevent damage to the battery; test button manually runs backup pump to ensure functionality; audible alarm during 12VDC pump operation
- SPECIFICATIONS: 12VDC backup pump with 6-ft. cord; 14 running Amps; 168 Watts; 42 GPM maximum; 20-ft. shutoff; 115 Volt charging unit; 345 Watt charging unit; 3 Amps max input; 10 Amps max output
Read More
- BATTERY BACK-UP SYSTEM: includes 10 amp battery charger, 2500 GPH 12-volt backup pump, diaphragm switch, pipe fittings, and battery box (battery and primary pump not included)
- PEACE OF MIND: if your primary pump should fail, or if there is a power outage, the Little Giant SPBS-10HF will kick in preventing a flooded basement
- FEATURES: controller/charger monitors the battery condition and charges the battery as required; microprocessor control charging unit maintains a maximum battery charge
Read More
![WAYNE - 1/2 HP Basement [Sump] [Pump] System with Integrated Vertical Float Switch and 12 Volt [Battery] Back Up Capability, [Battery] Not Included - Up to 5,100 Gallons Per Hour - Heavy Duty](https://m.media-amazon.com/images/I/41QwOPf-mFL._SL106_.jpg){kind=small}
Sump Pump With Battery Backup Combo
See All
Trickle Charger For Sump Pump Battery
See All
2hp Pool Pump With 1.5 Inch Connectors
See All
