Will it run my 1/2 HP sump pump?

Yes. It is rated for sump pumps up to 3/4 HP, so a 1/2 HP pump is within its range. Check your pump's running and startup amps against the inverter's output.

What battery do I need?

It works with 12V lead-acid, AGM, gel and LiFePO4 batteries, none of which are included. Choose a deep-cycle battery sized for how long you want the pump to run during an outage.

How long will it run the pump?

Runtime depends on the battery capacity and the pump's draw, and no runtime is specified. A larger deep-cycle battery gives longer backup; a small one may only cover short outages.

Does it switch to battery automatically?

The system is described as auto-switching to battery inverter power for the sump pump. It has no built-in float switch, so the pump's own switch still controls when it runs.

Is pure sine wave important for a sump pump?

Yes for motor-driven loads. Pure sine wave output runs pump motors smoothly and avoids the overheating and noise that modified sine wave inverters can cause.

The inverter unit with its AC outlet, USB port, LCD display and 3-prong plug. Batteries and pump are not included.

Where is the 1500W Sump Pump Battery Backup System cheapest?

At Walmart, for $154.45, as of our latest check.

Unbranded

1500W Sump Pump Battery Backup System

Best price now

$154.45at WalmartChecked Nov 12

Prices are checked against each store and labelled with when.

Visit Walmart

Unbranded

1500W Sump Pump Battery Backup System

Best price now

$154.45at WalmartChecked Nov 12

Prices are checked against each store and labelled with when.

Visit Walmart

Ask our agent about this product

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Price facts

Last seen at $154.45 at Walmart on Nov 12.

Our take on the 1500W Sump Pump Battery Backup System

This is a 1500W pure sine wave inverter that keeps a sump pump running when the power fails. It is rated for pumps up to 3/4 HP and plugs into a standard 3-prong outlet, so there is no hardwiring. It charges a 12V battery with three-stage charging and accepts lead-acid, AGM, gel and LiFePO4 types. Batteries are not included, so the total setup depends on the battery you add. Against dedicated sump pump backup systems, it is more flexible but less turnkey: you size and wire the battery yourself, and it has no built-in pump controller or dual-pump support.

Best forHomes with a 3/4 HP or smaller sump pumpBasements prone to flooding during outagesOwners who already have a 12V batteryDIY setups that want plug-in installation

Pros

Pure sine wave output is safe for sensitive pump motors
Rated for pumps up to 3/4 HP
Standard 3-prong plug avoids hardwiring
Three-stage charging supports lead-acid, AGM, gel and LiFePO4
LCD and LED indicators show voltage, battery level and status
Built-in overcurrent, overvoltage, short circuit, reverse polarity and high-temp protection

Cons

Battery not included, so cost and runtime depend on what you buy
No built-in pump switch or automatic pump cycling control
No stated runtime figures at a given pump load
Unbranded, with no track record of support or parts

1500W Sump Pump Battery Backup System prices at every store

WalmartNew
In stockSold by JLRHReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$154.45Free shippingChecked Nov 12
Visit Walmart

About the 1500W Sump Pump Battery Backup System

This is a 1500W sump pump battery backup system built for sump pumps up to 3/4 HP. It delivers pure sine wave output, which suits sensitive equipment. It switches automatically to battery inverter power during a power outage, helping protect a basement from flooding.

Setup uses a standard 3-prong plug, so no wiring is needed. It has an AC outlet and a USB port. A 3-stage charging process (Bulk, Absorption, Float) manages battery charging. It works with 12V lead-acid, AGM, Gel and LiFePO4 batteries, which are not included.

An LCD screen and LED indicators show voltage, battery level and working status. Built-in protection covers overcurrent, overvoltage, short circuit, reverse polarity and high temperature. A circuit breaker adds further protection.

Power: 1500W, pure sine wave output
Pump compatibility: Sump pumps up to 3/4 HP
Outputs: AC outlet, USB port
Plug: Standard 3-prong
Charging: 3-stage (Bulk, Absorption, Float)
Battery compatibility: 12V lead-acid, AGM, Gel, LiFePO4
Display: LCD screen and LED indicators
Protections: Overcurrent, overvoltage, short circuit, reverse polarity, high temperature, circuit breaker
Color: Black
Batteries: Not included

Specifications

color: BlackSource

Questions and answers

Will it run my 1/2 HP sump pump?: Yes. It is rated for sump pumps up to 3/4 HP, so a 1/2 HP pump is within its range. Check your pump's running and startup amps against the inverter's output.
What battery do I need?: It works with 12V lead-acid, AGM, gel and LiFePO4 batteries, none of which are included. Choose a deep-cycle battery sized for how long you want the pump to run during an outage.
How long will it run the pump?: Runtime depends on the battery capacity and the pump's draw, and no runtime is specified. A larger deep-cycle battery gives longer backup; a small one may only cover short outages.
Does it switch to battery automatically?: The system is described as auto-switching to battery inverter power for the sump pump. It has no built-in float switch, so the pump's own switch still controls when it runs.
Is pure sine wave important for a sump pump?: Yes for motor-driven loads. Pure sine wave output runs pump motors smoothly and avoids the overheating and noise that modified sine wave inverters can cause.
What is in the box?: The inverter unit with its AC outlet, USB port, LCD display and 3-prong plug. Batteries and pump are not included.
Where is the 1500W Sump Pump Battery Backup System cheapest?: At Walmart, for $154.45, as of our latest check.