4 Best Generators for Sump Pump – Reviews and Buying Guide

Rodney Nestor
Rodney Nestor
Research Writer
Rodney holds a Master’s degree in Arts and apart from working as a freelance writer, is a rather successful author of science fiction stories published in several literary read more
Last updated: August 23, 2023
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Anyone who has had a flooded basement knows how difficult it is to drain the water. A sump pump not only helps you with that but also prevents further damage to your house. And if the power goes out, you’ll need to get the best generator for sump pump if you wish to make the best use of your pump. There are several portable generators out there that boast of ample smooth power output, durability and other features. We have explored the market and come up with a list of the quality generators that turned out to be the best.

After thoroughly looking into 14 generators, we found the WEN 56380i to be the most outstanding in both features and functionality and the price. It is a simply designed generator that boasts of 3,800 watts and a gross weight of 99.1 pounds. It’s a portable inverter generator that offers a run time of 8.5 hours for ½ load with stable and safe electric output. It is the editor’s choice because it can be used in almost every situation and location. We also have included three other generators to help you make the right choice depending on your needs and taste.

In writing this review, we considered various features that each of the generators has. In describing the generators in detail and thereafter explaining the different features that make a great product, we are confident that this review will be of utmost benefit to you. Moreover, we have included a comparison table to help you scan what rating each of the units gets. The buying guide covers the most important features you need to consider before making a purchase. Moreover, in the FAQ section, we have looked into the common questions new generator users and buyers happen to ask.

Quick Summary

  • Editor’s Choice: WEN 56380i
    "This inverter generator produces just enough watts to power most sump pumps and something else if you need, and it’s portable so you can take it anywhere else where you need it"
  • Best Standby Generator: Champion Power Equipment 100174
    "This burly standby generator not only will automatically start when the power is out, but will power your whole house together with the pump"
  • Best Large Inverter Generator: Honda EU7000iS
    "This large but still portable inverter generator is incredibly quiet for the size and produces up to 7,000 surge and 5,500 continuous watts"
  • Best Dual-Fuel Generator: Champion Power Equipment 100263
    "This inverter generator is able to run on gasoline and liquid propane and several outlets to power some other appliances or tools"

Top 4 Generators for a Sump Pump Review 2024

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Editor’s Choice

WEN 56380i

  • Generator type: inverter
  • Fuel type: gasoline
  • Peak/rated watts: 3,800/3,400
  • Engine displacement: 212cc
  • Fuel tank: 2.23 gal.
  • Run time: 8.5 hrs (1/2 load)
  • Outlets: (2) 120V Three-Prong; (1) AC 120V NEMA TT-30R RV; (1) 12V DC, (1) 5V USB Port
  • Start type: recoil, electric
  • Dimensions: 23.2 x 18 x 20.1 in
  • Weight: 99.2 lbs
  • Warranty: 2-year limited

The WEN 56380i inverter generator is ideal for your sump pump not only because it boasts of a sleek design but since it is highly portable. The gasoline generator has an engine displacement of 212cc and a peak output rate of 3,800 watts. Given that a vast majority of sup pumps require at least 2,000 watts to start, you will find this generator perfectly suited for your home. The generator comes with a three-prong AC 120V outlet that is also NEMA TT-30R RV. With this unit, you don’t need to buy additional inverters. It is the best generator for a sump pump and refrigerator.

The generator meets the EPA III and CARB standards, thus making its operation very quiet and smooth. With a runtime of up to 8.5 hours at half-load run time, the generator will serve all of your outdoor needs with ease. Its fuel tank carries 2.23 gallons. An even more appealing feature is the generator’s capacity to use up the fuel in the carburetor before shutting down. It measures 23.2 x 18 x 20.1 inches making it a perfect add-on to your RV but more importantly portable when you need to use it with the sump pump. Also included in the unit is one 12V DC receptacle and one 5V USB port. The power outlay is smooth, and you can safely use the power from the unit to charge your phone or laptop. The sleek design and the 2-year limited warranty serves to make the unit even more popular.

    What are our favorite features?
  • High wattage for an inverter generator
  • Affordable
  • Sleek design
  • Quiet and RV ready
  • Electric start with recoil backup
  • Runtime is relatively long
    What could be better?
  • It’s heavy and the wheels are too small for off-road uses
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Best Standby Generator

Champion Power Equipment 100174

  • Generator type: standby
  • Fuel type: natural gas, liquid propane
  • Rated watts: 8,500 (propane), 7,500 (natural gas)
  • Engine displacement: 439cc
  • Propane fuel consumption (full load): 1.5 gal/h
  • Natural gas fuel consumption (full load): 139.8 ft3/h
  • Dimensions: 50 x 31.1 x 40.2 in
  • Weight: 386.1 lbs
  • Warranty: 10-year limited

For that peace of mind that you so much desire and deserve in your home, the Champion Power Equipment 100174 is what you need. This 8.5 kW home standby unit will power your sump pump and other household appliances with ease. Because it is fully automated, it demands minimal effort from you even in cold winter temperatures. This has been possible by the 24V starting system that allows the unit to start even in sub-zero temperatures. It is easy to set the generator to automatically start whenever there is a power outage. The manufacturer has installed a muffler to the generator, and this enables it to run at 59.5 dBA.

You can use propane to power the generator. You will get 8500 watts out of the unit, and it will use 139.8 ft3/h. This makes it perfect for almost every other kind of sump pump. When you use gasoline, you will get 7500 watts, and it will consume 1.5 gal/h. The unit doesn’t require any refuelling because you only need to connect it to the propane or natural gas system. Every week, the unit performs self-diagnostic tests, and this serves to ensure that it performs at optimal capacity always. With an engine capacity of 439cc, this Champion Power inverter generator produces 35.4 amps at 240 volts while using propane gas. The amperes go down to 31.3 when the unit is powered using natural gas. Armed with a modern alternator that produces less than 5% (THD) total harmonic distortions, you will safely power your sump pump and other sensitive electronics you may own. A 10-year limited warranty backs this 386-pound device.

    Why are we impressed?
  • Fully automated
  • Very powerful and efficient
  • 10-year warranty
  • Easily starts even in sub-zero temperatures
    What negatives must you be aware of?
  • It is not portable
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Best Large Inverter Generator

Honda EU7000iS

  • Generator type: inverter
  • Fuel type: gasoline
  • Peak/rated watts: 7,000/5,500
  • Engine displacement: 389cc
  • Fuel tank: 5.1 gal.
  • Run time: 18 hrs (1/4 load)
  • Outlets: (2) 20A 125V GFCI Duplex; (1) 30A 125V Locking Plug; (1) 30A 125/250V Locking Plug
  • Start type: recoil, electric
  • Dimensions: 33.4 x 27.6 x 28.4 in
  • Weight: 261 lbs
  • Warranty: 3-year limited (residential and commercial)

When looking for an inverter generator that poses no danger to your sensitive sump pump and other household electronics, the Honda EU7000iS is your answer. This 7000-watt generator delivers 120/240 volts. The manufacturer has employed modern fuel injection technology hence allowing the generator to consume little fuel. With a full fuel tank of 5.1 gallons, the generator will operate for 18 hours nonstop on quarter load. This technology used in the unit solves engine choke and a plethora of carburetor issues. While still employing modern advanced technology, the generator has been made to be ultra-quiet. It works at 52 dBA capacity.

For better consumer experience, Honda has included easy to operate handles. The two large wheels make the portability of the unit quite easy and convenient. Added to the unit are two outlets of 20 amps 120V. The unit meets NEC standards. Honda has made this generator even more practical by making it possible to co-join two units to get a total of 14,000-watt power output. It is understandable to forget to check on your generator. This is why the manufacturer has installed an oil alert that helps prevent the unit from shutting down because of oil. The 389cc power machine has a dry weight of 261 pounds hence making it one of the lightest in the market. The manufacturer has backed the generator with a 3-year warranty whether it’s being used for residential or commercial purposes.

    Why is it special?
  • Huge power output for an inverter generator
  • Super quiet for the size
  • Long runtime
  • Easy to use with household appliances
    What are the flaws?
  • The recoil starter is not easy to pull
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Best Dual-Fuel Generator

Champion Power Equipment 100263

  • Generator type: dual-fuel inverter
  • Fuel type: gasoline and liquid propane
  • Peak watts: 3,400W (gasoline) / 3,100W (propane)
  • Rated watts: 3,060W (gasoline) / 2,790W (propane)
  • Engine displacement: 192cc
  • Fuel tank: 1.6 gal.
  • Run time: 7.5 hrs (gasoline, 1/4 load); 14.5 hrs (propane, 1/4 load)
  • Outlets: (1) 120V 30A (TT-30R); (1) 120V 20A Duplex (5-20R); (1) 12V DC Automotive
  • Start type: recoil, electric
  • Dimensions: 22.75 x 20 x 17.3 in
  • Weight: 95.7 lbs
  • Warranty: 3-year limited

Are in you need of a perfect portable inverter generator for your sump pump that is sleek and highly efficient? The Champion Power Equipment 100263 of 3,400 watts should be your pick. The easy to start generator can be used at home or any other project you might have. Even in cold freezing temperatures, you can cold-start the unit. The generator takes care of the environment as it produces less than 3% THD of Clean Power which is what your sump pump needs. The 1.6-gallon gasoline/ gasoline tank enables the 192cc engine to produce between 3,400 and 3,100 watts. It produces 3,060 starting watts and 2,790 running watts. You will enjoy easy access to smooth power the whole night (7.5 hours) at 25% load while using gasoline and 14.5 hours while using propane. It is one of the best gas generators for sump pump out there and comes with a switch allowing you to use gasoline or propane.

As a manufacturer, Champion understands that you use the inverter for a range of household chores. The unit comes fitted with two 120V 20A outlets that offer between 5 and 20 power resistance. If you want to use DC current, there is a 12V outlet. Operating this generator is user-friendly since the manufacturer has included the smart Economy Mode. This allows the unit to deliver electrical power with minimal noise at 59 dBA while being very economical with fuel. You can pick the optional Parallel Kit that lets you connect the unit to two 2,800-watt inverters. Indeed, you can connect two 15,000 BTU RV air conditioners to the generator. It is backed with a 3-year limited warranty.

    What makes it stand out?
  • Dual-fuel capability
  • Easily portable
  • Runs quietly
  • Reliable warranty
  • Stylish
    Which disadvantages must you keep in mind?
  • A bit heavy
  • Gas tank is on the small side
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Things to Consider

To make your sump pump effective and reliable, you should invest in a small generator. These best small generators for sump pump are perfect when there is a power outage or if you are not connected to the grid. We have analyzed several of these portable generators based on their features and their performance and picked the above-described list. In our buyer’s guide section, we explore these features and also answer some FAQs that you may have to try and help you pick the right generator to serve your needs.

Generators for sump pump: portable or standby?

4 Best Generators for Sump Pump – Reviews and Buying Guide

Depending on your budget and needs, you can invest in standby or a portable generator. A portable generator such as the Champion Power Equipment 100263 usually has a maximum power outlay of 8,500 watts. They are also cheaper, and you should expect to pay anything between $400 and $4,000. These pumps tend to be noisier and run on mainly gasoline. Those with RVs prefer them. On the other hand, the standby generators are more expensive and primarily use natural gas and propane. These generators deliver an upwards of 8,000 watts and come in handy when there is a prolonged power outage. You will need a professional electrician to help you install the unit.

How much power do you need for your sump pump?

A sump pump is an essential piece of equipment to have in your home. In case there is a power outage, your sump pump will continue needing power supply, and this is where the best back generators for sump pumps come into play. A sump pump usually consumes a lot of surge power when starting. You must, therefore, have a generator that can give an output of at least 2,000 watts. After the sump pump has stabilized, the power needed goes down to 500 watts. All of the above generators will power your sump pump perfectly.

How long you need to run your generator?

An essential factor to consider when buying your generator is how long it can run without the need for refueling. Of course, the larger the larger the fuel tank the longer the runtime. However, this is not always the case. Engine capacity and technology used by the manufacturer affects how long your generator runs. The Honda EU7000iS generator fuel tank can hold 5.1 gallons and run for 18 hours on ¼ load. On the other hand, the WEN 56380i has a 2.23-gallon fuel tank which enables it to run for 8.5 hours on ½ load.

On average, sump pump generator fuel tanks ensure a runtime of between 7 to 18 hours depending on their capacity.

Safety features

You must invest in the best generator for running your sump pump, especially when it comes to safety. When buying a generator for your domestic use, check whether such has a low-oil shutoff or alarm. In the case of the Honda EU7000iS, the manufacturer has installed a low oil-alert that helps you monitor the oil consumption of the unit. The low-oil shutoff feature can prove helpful as it prevents the generator’s engine from blowing. Your unit should also be protected from overload. For smooth power supply that doesn’t destroy some of your sensitive electronics, manufacturers such as Champion have included the THD feature.

Tips and tricks

4 Best Generators for Sump Pump – Reviews and Buying Guide

To enjoy using your generator for running your sump pump for many years, here are a few tips and tricks to consider.

  1. Make sure your generator is clean, dry and properly secured – Cleaning your generator and keeping it in a dry place helps at keeping it durable and efficient. Keep the generator well-oiled and always have a fresh supply of fuel container. Securing it keeps it safe from thieves. If you are buying a portable generator, then the ability to move with ease should be a factor to consider.
  2. Set the generator at least five meters away from windows and doors. This is to prevent exhaust gasses entering the house and also keep the noise away. If it is raining and you have to use the generator, you should consider buying a gen-tent.
  3. Before using the generator, use the right cord and fill the fuel tank. You can then start the engine and when its running, connect the power cord. You will hear the water being pumped away from the building.

Sump pump generator prices

As described above, you can buy a portable generator or a standby generator for your sump pump and other household needs. Your generator for running sump pump must be capable of producing at least 2,000 surge watts and 1,000 running watts. This means that the price tags for sump pumps is a little bit higher than those of basic generators. With as little as $500, you should find yourself a reliable portable generator. The price goes up to $4,000 and more depending on the specific features that you seek in a generator. You can invest in a standby generator or bigger portable generators that delivers at least 7,500 watts. Such a unit can be ideal for bigger sump pump and other sensitive household appliances. You should, however, be ready to give around $8,000 or more for such a unit.


Are inverter generators better for a sump pump than conventional ones?

The main difference between inverter generators and conventional generators is the type of power they produce. For the inverter generators, you will get power through a three-phase process. The generator produces high-frequency AC which is then turned in DC and then to a stable AC current. The conventional generators, on the other hand, only produce AC current. Since the inverter generators produce low minimal harmonic distortion and are a clean source of ‘clean power’ it is ideal for your sump pump and other household electronics. The inverter generators are highly portable, but they are noisier than the conventional ones. Though the conventional generators are a perfect source of power, their high harmonic distortion and non-portability make them a lesser favorite to those searching for the best generators for running a sump pump.

How can I connect a portable generator to my house?

Portable generators are convenient to use in a home setup. This is because they don’t require a lot of technical knowhow to operate and maintain. Moreover, being portable makes them ideal for different sizes of homes.

The first thing to do when you think of connecting a generator to your home is to buy a transfer switch device. A professional electrician should install this device. When the power goes off, turn on the generator and then plug in the power cable. Remember to first put the generator in a safe place where it won’t vibrate and fall and also where its emissions will go out into the open and not towards the house.

Our verdict

Our editor’s choice is the WEN 56380i inverter generator. This generator is ideal for a sump pump and other household appliances. With a peak power rating of 3,800 watts and an engine displacement of 212cc, you will find this machine ideal for your house needs, especially when there is a power outage. By pouring into it just 2.02 gallons of gasoline, you get 8.5 hours of operation at half load.

The best standby generator is the Champion 100174 generator which is also dual-fuel inverter. It scores highly among the best generators for sump pumps because it uses both natural gas and liquid propane and has a high-power delivery. It delivers 8500 watts and has an engine displacement of 493cc hence making it the perfect home standby generator.

The Champion 100263 generator scores a rating of 8.9 in our review because it is the best dual-fuel generator in the market. This generator can use both gasoline and propane. Though the power output when you use propane is lower at 3,100 watts at its peak, you will love the alternatives it provides you.


Sump Pump Questions
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Total Score
WEN 56380i - Editor’s Choice
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