Portable Generators Home Buying Guide

Portable generators can be a lifesaver during power outages, but with so many options available, it can be overwhelming to choose the right one. Most portable generators range from 1,000 to 10,000 watts, with the average homeowner needing around 3,000 to 5,000 watts for basic appliances.

Before making a purchase, consider the size and weight of the generator, as well as its fuel capacity and running time. A larger generator may be more expensive, but it can also provide more power and longer runtime. For example, a 5,000-watt generator can run for around 12 hours on a single tank of gas.

When evaluating a portable generator, think about the types of appliances you want to power. If you need to run a refrigerator and lights, a 3,000-watt generator may be sufficient. However, if you want to power a well pump or air conditioner, you'll need a more powerful generator, such as a 5,000-watt or 7,000-watt model.

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Choosing the right generator is crucial to ensure you have enough power for your essential appliances.

Manufacturers rate Portable Home Generators in watts, which can be confusing if you don't know the difference. Running Watts = how much power the generator can supply continuously, while Starting Watts = the power a generator can supply over 1-3 seconds to start a motor.

To calculate your power needs, you need to know the starting and running watts of each appliance. For example, a refrigerator needs 900 running watts and 1800 starting watts.

A common misconception is that the starting watts are the same as the running watts. But in reality, they can be twice as much or more. This is why you need to consider both when choosing a generator.

Here's a rough estimate of the wattage needs for common appliances:

The total wattage for these appliances is 6390 watts. Keep in mind that your needs, appliances, and power requirements may vary.

To reduce the risk of carbon monoxide poisoning, many new generators feature a built-in sensor that triggers an automatic shutoff if CO builds up to dangerous levels in an enclosed space.

Some portable generators also have engines that emit less CO in the first place, which is a lifesaver. Recent test data from CR shows that this safety feature is likely to save lives.

Always operate a generator a minimum of 20 feet from your home, with the exhaust directed away from windows, doors, air conditioners, and other structures. This is crucial for preventing carbon monoxide buildup in your home.

Consumer Reports recommends only portable generators that pass their expanded CO safety technology test. This ensures that your generator meets the highest safety standards.

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Automatic CO Shutoff is a critical safety feature that automatically shuts down a generator's engine if a built-in CO sensor detects carbon monoxide levels. This feature is essential for portable generators and must pass safety tests to earn a spot on recommended lists.

Look for certifications like ANSI/UL2201 Certified for Carbon Monoxide Safety or ANSI/PGMA G300 Certified Safety & Performance on the packaging to verify a generator meets the standard. Brands like Generac, Honda, and Ryobi offer options with this technology.

Several portable models offer Electric Start, which is a push-button alternative to pull-starting the engine. This feature is great for emergency situations, but factor in the added cost of the battery if it's not included.

Most portable models run only on gasoline, but some come equipped to run on a propane tank or natural-gas line. You can also convert some models with kits.

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Inverter generators are a type of portable generator that offers more power with less noise and better fuel efficiency. They're a great option for those who need reliable power on-the-go.

Inverter generators operate more efficiently, allowing you to get a longer run time from the same amount of gasoline. This means you'll spend less time refueling and more time enjoying the power.

Inverter generators are known for producing cleaner power than traditional portables, making them a safer choice for sensitive electronics. They also run quieter, thanks to their sophisticated exhaust systems and ability to throttle up and down to match demand.

If you're looking for an inverter generator, you can expect to pay between $400 and $4,000, depending on the model and features. Some popular brands include Briggs & Stratton, Honda, and Generac.

Here are some key features to look for in an inverter generator:

Fuel options for generators can be a bit overwhelming, but let's break it down. Gasoline is the most powerful fuel choice, providing the most energy.

You'll find that gasoline-only models are a bit cheaper than dual fuel or tri fuel options. However, this power comes with a tradeoff: gasoline is harder to store and lasts less long than LP propane.

LP propane, on the other hand, is easier and safer to store, and it lasts longer than gasoline. You can also use larger storage tanks with propane, which extend the run time before refueling.

Here's a quick comparison of the three fuel options:

Natural gas, while less powerful than propane, offers the advantage of a virtually unlimited fuel supply with a municipal connection. This makes it ideal for extended run times.

If you're in the market for a generator, you'll want to consider the features and options available. A key factor is the power output, measured in watts, which is calculated by multiplying volts by amps. For example, 120 volts multiplied by 10 amps equals 1200 watts.

Some generators have a high surge capacity, which is essential for appliances with high starting watts. A chest or upright freezer, for instance, might have a starting wattage of 2160. You'll also want to consider the running watts of your appliances, which is the power they use when operating normally.

To calculate the minimum generator capacity required, make a list of the appliances you need to run during an outage, including their running and starting watts. Then, total the running watts and add 25% to account for unexpected loads. Add the highest starting watts from your list, as well as any additional motor loads that might start frequently, like a sump pump.

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A portable generator sizing guide can help you determine the right size generator for your needs. For example, if you have 10, 13-watt LED lights, the total running watts would be 6390. Adding 25% to this total gives you 7988 running watts. Then, add the highest starting watts from your list, which in this case is 2160. This means you'll need a generator with at least 7988 running watts and 10148 starting watts.

When choosing a generator, consider the type of appliances you'll be running and their power requirements. A central air conditioner, for instance, is a heavy electrical load that requires a significant amount of power. The starting watts of a central air conditioner can be estimated as 2x the running watts, or 3500 for a 1-ton unit and 11500 for a 5-ton unit.

Here's a rough estimate of the starting watts for different central air conditioner sizes:

Keep in mind that these estimates can vary depending on the specific appliance and installation. It's always best to consult with a licensed electrician and HVAC technician to determine the right size generator for your needs.

Automatic CO Shutoff is a critical safety feature that automatically shuts down a generator's engine if a built-in CO sensor detects CO levels. This feature is a must-have for portable generators and must pass safety tests to earn a spot on our list of recommended models.

Generac, Honda, and Ryobi are among the many brands that offer generators with this technology, with over a dozen models in our ratings featuring a CO safety shutoff. Look for certifications like ANSI/UL2201 Certified for Carbon Monoxide Safety or ANSI/PGMA G300 Certified Safety & Performance on the packaging.

Low-CO Engine technology is also available, with brands like Ryobi and Echo using it to reduce the risk of carbon monoxide poisoning. This is a great option if you're concerned about safety.

Automatic Start is a convenient feature that allows the generator to turn on without you lifting a finger, which is perfect for travelers or those who work far from home. This feature is available on stationary models and some portable models.

Electric Start is a push-button alternative to the hassle of pull-starting the engine, but factor in the added cost of around $50 if the battery is not included.

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The 6,800-Watt Recoil Start UL Gasoline Generator is a powerhouse for any situation. It's equipped with a 420cc OHV engine that delivers 6800 running watts and 8500 starting watts.

This generator is ideal for powering a wide range of equipment, from corded power tools to large appliances, A/C units, and heaters. It's perfect for storms, on the jobsite, or in remote locations like campgrounds.

The six-gallon fuel tank offers up to 9 hours of runtime at 50% load, allowing you to use it without interruption. This means you can keep your devices powered throughout the day.

Conveniently, the generator has two 120-Volt/20 Amp GFCI duplex and one 120-Volt/240-Volt 30 Amp twist lock outlets for plugging in a variety of devices.

The RYOBI 6,500-Watt Portable Generator is a reliable power solution for home or jobsite use, delivering 6,500 Running Watts and 8,125 Starting Watts of power.

This generator features a durable wrap-around hand truck frame and 10 in. wheels that protect the unit while making it easy to transport.

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An Automatic Voltage Regulator ensures reliable and consistent power while preventing damage to the generator and the devices plugged into it.

The easy-access control panel has four 120-Volt 20 Amp (GFCI Protected) outlets and one 240-Volt 30 Amp Twist Lock Outlet to meet all your power needs.

This RYOBI Portable Generator is backed by a 3-Year Limited Warranty, guaranteeing its performance.

It's worth noting that the RYOBI 6,500-Watt Portable Generator has a CO shutdown sensor, which is a critical safety feature that automatically shuts down the generator's engine if a built-in CO sensor detects that the deadly gas has reached certain levels.