How Much Power Does A Sump Pump Draw

How Much Power Does A Sump Pump Draw?

Sump Pumps have always been a lifesaver for your flooded basement in wet spring months. During those periods having a sump pump becomes a must.

Before getting one, different questions may pop up in your mind, like, “how much power does a sump pump draw?” and many others.

Typically, an average sump pump draws 10kWh of power per month in households. Another fact to keep in mind about the power usage of sump pumps is the HorsePower (HP).

You’ll get to know more if you stick around to the end. So, without further delay, let’s explore the details.

How Much Power Does A Sump Pump Draw?

In today’s market of sump pumps, you can see various options. According to different models, they draw a different amount of power, and the annual cost varies.

Size Of The Pump Matters

Generally, smaller pumps draw much less power than larger pumps. You may believe in the concept, “the bigger, the better”. But make sure you don’t overload your power flow system with the sump pump.

Besides, the power consumption may also vary on the brand motor and the quality.

Two Kinds Of Power Consumptions Take Place

One more thing to check on while considering the energy requirement for a sump pump is that there’re two kinds of power demands created in a  sump pump.

First is the running watts and the other is the starting watts/start-up watts. When you start the pump, more watts are drowned than the running watts. After a few seconds of the pump’s start, it returns to the running watts.

Energy Usage Depending On The HP Of The Sump Pump

Now, let’s get a general idea of how much power a regular sump pump can draw.

In most houses, people install a 1/3HP or 1/2HP sump pump. A 1/3HP sump pump will draw 1300-1600 watts of energy while starting up. After a while, it’ll start drawing 600-800 running watts.

Then, a 1/2HP sump pump is bigger than a 1/3HP sump pump. It’ll draw the energy accordingly. At starting it requires 1500-2150 watts of power then it’ll drop to 800-1000 watts in the running mode.

Cost Estimate Of Most Common Household Sump Pumps

You can calculate the cost estimate similarly considering the HP of the sump pump.

Suppose, you’ve installed a smaller pump like 1/4HP or 1/3HP. These pumps will cost you around $10 – $20 per month. The exact amount may vary a bit depending on your residence’s location.

If you install a larger pump with a 1HP motor or more, that may cost you around $30 to $40 per month. That’s why be sure about your cost and needs before you invest in a sump pump.


How many amps does a 1 HP sump pump draw?

A 1HP sump pump draws 9.8-10amps of electricity. That means a 1HP motor sump pump must require 10amperes of power transportability.

How many amps does a 1/3 horsepower sump pump draw?

A 1/3 horsepower sump pump draws 3.7amps of power. If you install a 1/3HP sump pump your electrical output must be able to flow electricity through 3.7ameperes.

Does a sump pump use a lot of electricity?

Sump pump electricity consumption depends mainly on the HP of the motor. Sump pumps with larger HP consume more electricity than smaller HP sump pumps.


If you’re still here, hope that you got your answer. Now, if you’re planning on getting a sump pump, firstly check the power circuit, your house’s main power source, and see how much load it can take.

To improve your inspection job, seek professional help to understand your needs and capabilities. Then go along with what they suggest.

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