How Many Watts Does a Sump Pump Use?

Sump pumps protect your basement from flooding, so understanding how much power a sump pump uses can make the difference between a dry foundation and a homeowner’s worst nightmare. Learn about the power needs of your pump to find the right energy source for it.

How Much Wattage Does a Sump Pump Use?

Power consumption metrics are not usually at the forefront of every homeowner’s mind, but when your property is at risk of flooding, they become critical. Sump pumps, responsible for pumping water out of your home’s lowest level, typically come with a horsepower rating of either 1/3 hp or 1/2 hp, and they use between 800 and 1050 watts when running, respectively. However, during a flooding event or when they kick on, they may spike to consume up to 1300–2900 watts (for 1/3 hp) or 2150-4100 watts (for 1/2 hp).

The tricky part in understanding a sump pump’s power needs lies in this distinction between ‘running’ and ‘starting’ watts. When the pump needs to get to work, it demands this surge power for the initial start-up, often exceeding its regular running power by a significant multiple.

The EcoFlow DELTA 2 Max, from the EcoFlow DELTA Series, can provide sufficient battery backup for either 1/3 hp or 1/2 hp sump pumps, with its 2400W running output and 4800W surge output to handle even the largest and most demanding pumps.

How To Calculate Sump Pump Power Consumption

Calculating the power consumption of your sump pump requires a clear understanding of your sump pump’s wattage needs, the duration it typically runs, and whether you’re fully aware of which pump you own.

The formula to calculate the sump pump’s power consumption is wattage multiplied by the number of hours it’ll be used.

For example, a 1/3 hp pump that usually runs 8 hours a day would consume about 6.4 kWh daily (800W x 8 hours).

You can also manipulate the electricity units within the formula to figure out things like amps from watts and more.

Frequently Asked Questions

Do Sump Pumps Use a Lot of Electricity?

Relative to some household appliances, sump pumps do not use a lot of electricity when running under normal circumstances. However, factors such as the size of the pump, the rate at which it runs, its starting wattage, and your pump’s effectiveness at handling the volume of water may influence its power use. 

Final Thoughts

Understanding the wattage needs of your home’s appliances, especially mission-critical ones, is essential to prepare for potential emergencies. When in doubt, err on the side of caution. This could mean investing in a generator with a higher starting watt capacity or using a surge protector to prevent potential damage to appliances. 

EcoFlow portable power stations offer a reliable solution to managing the power demands of a sump pump, providing a balance between surge and running wattage and the convenience of a battery- or solar-powered device that can be used indoors and outdoors.

EcoFlow is a portable power and renewable energy solutions company. Since its founding in 2017, EcoFlow has provided peace-of-mind power to customers in over 85 markets through its DELTA and RIVER product lines of portable power stations and eco-friendly accessories.


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