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Buying Guide: How To Choose A Generator

Generators let you carry on with life when the power fails. They also allow you to bring energy to remote areas for work and play. Use this guide as a generator checklist to compare models, features, and benefits to find the right equipment.


Uses and Applications

Generators supply power when and where you need it. They are indispensable during those initial stages of a construction project when you do not have an electrical hook-up. Depending on the generator’s power output, you can run some essential equipment or power a household.

  • You can take them on camping trips to enjoy a few creature comforts in the wild or power emergency equipment and battery chargers.

A standby generator is a lifesaver if you own a business, keep valuable data on your computer, or run medical equipment in your home. You install it outside your building and connect it to your building’s electrical system. When the power goes out, these generators kick on automatically to restore power quickly. Set up a disaster-ready site for you and your loved ones, or make sure you will not miss a minute of the big game with the right standby generator at your side.


Capacity

Voltage/Output Control

Basic types of generators run at a constant rate and create power that might exceed your needs. Many manufacturers make higher-grade models with voltage regulation technology that delivers consistent voltage, even if the equipment is not running consistently at the targeted RPM; this helps reduce the risk of surges and sags damaging your electronics. Some models have an output control feature that decreases engine load and fuel consumption when you are not using much power. If maintaining enough fuel is an issue or you do not plan to run many devices, find a model with voltage regulation.

Wattage

To ensure you get the right generator, consider how many and what types of appliances you plan to power. Start by doing a power survey by:

  • Check the labels of all the appliances or tools you need to run for their power consumption in Watts.
  • Add up the devices’ total Wattage.
  • Add half that number to the total to calculate the power each device needs.
  • Note: You can get by with a smaller generator if you do not need to run your devices simultaneously, such as a TV and a radio.

This handy generator comparison should give you an idea of which models will meet your requirements. A small 1,000-watt portable generator can power your kitchen’s refrigerator or run the TV and keep some lights on. A mid-range 5,000-watt model can run a belt sander, table saw, and work lights, especially if you switch between devices. You can enjoy many modern conveniences with a top-rated generator that produces 10,000 Watts or more.


Standby Generators

Standby generators run on either propane or natural gas, or both. Propane is inexpensive to fill and is readily available in every area. If your tank holds 250 gallons of propane, you can enjoy up to two weeks of electricity for your household, depending on demand and how quickly your generator burns the fuel. A natural gas model hooks directly to your line for constant power that does not require refilling.

Not every area has natural gas or ample pressure to supply a powerful generator. If your home or business is in a low-pressure area, purchase a model rated for your property’s specific availability. A low-pressure natural gas model is your best bet when you cannot find the precise pressure at your home.

Aesthetics

You cannot move one of these types of generators once you place it. Check local ordinances and your homeowners’ association to ensure your placement choice is acceptable before you install it. Most come in neutral colors, such as gray, black, or shades of brown, to complement most exterior color schemes. You do not want to deal with much noise, nor do your neighbors. Research every generator’s decibel level and know that a jump in ten decibels implies the sound produced is ten times louder.

Materials and Safety Considerations

These generators have protective shells to protect their parts from the wind, rain, and other elements. Galvanized steel is rust-resistant, but aluminum or shells made from the same material as truck bed lining are entirely immune to rust and can withstand more punishing weather. However, they might not stand up to impact as well as steel. If you live in an area with frigid winters, install a cold weather kit to keep it operational in harsh conditions.

Cooling System

Standby generators create a lot of heat. They stay cool either with a set of fans (air-cooled) or a radiator system (liquid-cooled). Liquid cooling is quieter since it does not require moving parts but uses more power, so you tend to see it only on larger models.


Application

Possible uses

Best type

Comments

Home back upMedical equipment, computers, home appliancesStandbyLongest run time of all generators
RecreationalRadios, TV, computers, cooking equipment, battery chargersPortableMost convenient type of generator overall
IndustrialWelding tools, corded tools, cordless battery chargersPortable/WeldingCome with welding equipment included

Portable Generators

Portable generators feature either a pull or electric start. A pull-start generator turns on much like a lawnmower, which requires effort that you might not want to make during inclement weather or an emergency. Electric stars are simple affairs that only require pressing a button or turning a key.

Outlet options

The Wattage your generator produces determines how much power it provides, but the number of available outlets also limits it. Most of these types of generators have two or four outlets. A two-outlet model is sufficient if you only run battery chargers or a few items.

Invest in a four-outlet version if you use a portable generator for emergency backup. Welder generators, a particular dual-purpose generator that combines the functions of a welder and a generator, have a greater variety of receptacles to power other demanding equipment.

Size and transportability

If you plan to keep the generator in your garage until an emergency arises, transportability is not much of an issue. If you want to take it to the job site or on a trip, you need to know if a model is small enough to fit in your truck bed, trunk, or trailer and how much it weighs.

The greater a generator’s power output, the more it is likely to weigh. Not every portable generator features a wheel, so check the specifications before you buy.

Fuel type and run time

These types of generators run on gasoline or propane. Propane is clean-burning and lasts forever in the tank, while gasoline produces fumes and spoils if you do not use it, which can lead to internal damage. Gasoline-powered generators run longer than propane-burning equipment of similar sizes.

Applications

Smaller portable models are ideal to bring along on day trips where you want to use a specific device. If you’re going to power a few tools on a job site, then a portable generator capable of powering your essential tools is what you need. You can use larger top-rated generator models for home power in an emergency, but you must keep it outside and far away from your home to prevent carbon monoxide from entering the house. It would be best to have enough extension cords to run from each outlet, or a professional electrician can wire it to your home’s circuits for an inexpensive emergency backup system.


Generator Comparisons

Application

Possible uses

Best type

Comments

Home back upMedical equipment, computers, home appliancesStandbyLongest run time of all generators
RecreationalRadios, TV, computers, cooking equipment, battery chargersPortableMost convenient type of generator overall
IndustrialWelding tools, corded tools, cordless battery chargersPortable/WeldingCome with welding equipment included

Conclusion

Whether you are a contractor who needs to power heavy-duty equipment in a remote location, a business owner who needs to protect your data or other assets, or someone who wants to keep their family comfortable and safe, we have a generator for you. Take your household power needs into your hands today and ensure you have everything you need in an emergency or when you want extra fun on your next adventure.


Would you like more information on choosing between a Portable Generator and a Whole House Standby Generator? Read more.

14 Comments

  • Rachel Lannister

    June 1, 2017 at 3:21 pm

    In the article you stated that you should choose a generator based on the amount and types of appliances you are planning on powering. Especially if you are a business, and need to keep things running in order to stay profitable, a generator would be a great option. I’d also imagine that businesses that run large equipment would require a rather powerful generator that creates a lot of wattage.

    Reply
  • Zequek Estrada

    June 8, 2017 at 12:44 pm

    I’ll be moving to an area where I heard the storms can be a bit intense. Apparently, it’s common there for electricity to go out because of the wins. That’s why I’ve started looking into investing in a portable generator. It’s good to know that the wattage is the one thing that I need to make sure to check.

    Reply
  • Kylie Dotts

    June 14, 2017 at 6:27 pm

    I like how you said you should see how many and what kind of appliances you plan to power. Knowing exactly what it is beforehand you’ll be using your generator for will help narrow your choices and make the process much quicker. My husband has been talking about buying a generator to take when he and our sons go camping so if he were to buy a generator it would probably need to be able to power camping equipment like stoves and lights.

    Reply
    • Acme Tools

      June 15, 2017 at 7:29 am

      Hello,
      Thank you for your comments. Generators are great for camping and also for emergencies at home.

      Thank you,
      Acme Tools

      Reply
  • Deb Pearl

    September 5, 2017 at 8:01 am

    My family loves going camping, but sometimes we miss having power for things, and hate trying to use our car to charge our electronics. A portable generator sounds like just the thing we need. That’s really cool that they can start as easily as pressing a button! We will have to look more into different ones we can take on our trips! Thanks!

    Reply
  • Hannah Schroeder

    November 15, 2017 at 10:17 pm

    Thanks for the information about how you can use a generator for 2 weeks if your propane tank holds 250 gallons. We’ve had some large storms in my area recently, and I’m worried about what my family will do if we have an extended power outage, so I’ve been looking for buy generators just in case. My propane tank holds 500, so if we get a standby generator, we could have more than 2 weeks of power if there’s an outage.

    Reply
    • Acme Tools

      November 16, 2017 at 9:44 am

      Hello, Thank you for your comment. Home stand-by generators are nice that way where they can run for extended periods of time and you don’t have to worry about filling a fuel tank every 6-8 hours. All units have different fuel consumption and require different size gas lines so make sure to investigate that with the manufacturer.

      Thank you,
      Acme Tools

      Reply
  • Callum Palmer

    December 4, 2017 at 7:41 pm

    I agree with the article, portability is definitely a valid concern when you’re choosing an emergency generator. This is especially true if you plan to use the generator for more than just emergencies. For example, you may choose to take the portable generator camping with you just in case you need a some power.

    Reply
  • Jocelyn McDonald

    May 10, 2019 at 11:55 am

    My husband and I want to get a generator for our home that we can use just in case of a power outage or other emergency. Your article had some great tips for choosing equipment like this, and I liked how you said if we get a standby generator, we should make sure it’s placement is aesthetically acceptable with our local ordinances and HOA. Thanks; we’ll keep this in mind when buying a generator.

    Reply
  • Alice Carroll

    April 11, 2021 at 5:58 pm

    Thanks for pointing out that I should also account for the carbon monoxide emissions when planning to get a commercial generator installation service. I’m interested in finding the right unit for the ice cream shop that I plan to open someday. Making sure that the refrigeration units work despite a power interruption will be quite crucial for operating such a business.

    Reply
  • SOS Survival Products

    April 11, 2022 at 12:45 pm

    Thanks for sharing this information! Choosing the right generator for your home can indeed be confusing. The noise can also be a factor as some prefer a more quiet system. Does the size of the power generator affect the noise it generates?

    Reply
    • Acme Tools

      April 12, 2022 at 7:36 am

      Hello SOS Survival Products, Thank you for your question. Generally speaking, the larger a generator is the louder it will be but that is not always the case. The new Inverter Generators are very quiet in comparison to older designs of generators. Inverter generators also give off cleaner power so if you are looking to run anything with sensitive electronics please look into this type of generator.

      Thank you,
      Acme Tools

      Reply

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