Wattage

When it comes to generators, the amount of power produced is the primary consideration. You’ll want to look for a good fit between how much wattage a unit generates versus how much you need. Obviously, more wattage is ideal, but if you want to get away on the cheap, consider a model that just does the essentials.

Be careful when evaluating wattage on the product packaging, however. While many generators include the maximum wattage in the model name, they produce a little less wattage under a significant load. We’ve included the correct wattage in our tables and product reviews for generators operating under quarter loads.

While 20,000 watts keeps an entire home functional, as little as 600 watts is enough power for a few lights and an appliance. SafeWise’s portable generator recommendations fall within the 2,000–7,000-watt range, ensuring you’ll be able to keep things like your fridge and essential lights fully functional.

Not sure how much juice you’ll need for your home? You can utilize an online wattage calculator to determine the general range that would best meet your needs.

Type of Fuel

Generators run off many different types of fuel depending on the size and model of the unit. Standbys tend to use cleaner fuel options, such as natural gas or propane, while most portable generators run on traditional fuels like gasoline.

While gasoline is risky to store, it’s also the most commonly used fuel for portable generators because it’s easily accessible and relatively cheap. Solar generators employ technology that’s still developing and doesn’t produce much power yet, so they are best suited for smaller homes, like apartments.

Permits

These devices can be noisy, so many cities require that you get a permit to use a generator. SafeWise recommends checking into the ordinances in your area and securing a permit before you buy because we’re all about the better-safe-than-sorry approach. And keeping your neighbors from calling in a noise complaint.

Inverter (OHV)

Inverter generators are optimal for several reasons, including having engines with overhead valves or OHV, but let’s just cut through the techspeak and explain why. Inverters make a generator’s engine quieter, cleaner, and longer lasting. The downside? Inverter models are also more expensive.

At SafeWise, we’d argue that the long-term gains you’ll reap over time in efficiency and durability make inverters worth the higher price tag. All our recommended models except for one have inverters, so unless you desperately need to cut corners for financial reasons, don’t skimp on this feature.

Cost

We’ve chosen to focus on portable generators as a cost-effective approach to powering your home during an emergency. However, a standby generator may be a better fit long term if you have a large home with extensive power needs or you experience frequent outages.

Pay attention as well to some hidden expenses that aren’t included with the generator, like wheels. Yes, you read that right; some portable models don’t come with wheels, so you have to buy them separately. It pays to read the fine print.

One of the best things you can do to cut costs is to plan ahead. Frequently, folks buy generators when an emergency occurs, so demand drives up prices. Purchasing a unit in the off season can save you a bundle and provide the security of knowing you won’t have to arm wrestle for one at your local hardware store during an emergency.

How to Properly Use Your Home Generator

Whether you have a portable or a standby generator, you’ll want to consider having a professional install a transfer switch. These switches allow the generator to connect directly to your home’s electrical circuit board during a power outage. Do not, however, attempt a do-it-yourself approach on this. It’s absolutely something you need a professional to install not only for your personal safety, but also for the well-being of nearby utility workers who might inadvertently get zapped.

See Honda’s website for a more in-depth guide on how to properly connect your generator.

If you opt not to professionally install a transfer switch, you’ll need to connect your portable generator directly to your appliances via a heavy-duty extension cord. Stock up on extension cords and have some handy that can handle the wattage and go the distance.

One final, very important note about using your generator: Portables run on gas, and gas gives off carbon monoxide fumes that can be fatal. Never use your portable generator indoors. You need to run the unit at least fifteen feet from your home, away from windows and doors, and in the open air where it can be properly ventilated. For more information about how to safely use your generator, see the Red Cross’s guide to operating a generator in an emergency.

Red Cross’s Guide to Safe Generator Use

We’d also recommend installing a carbon monoxide detector regardless, but especially if you plan to operate a generator. See which detectors hit SafeWise’s recommended list.

Top Carbon Monoxide Detectors

Safety and Maintenance for Portable Generators

To keep your portable running in tip-top condition and ready to power up during the next outage, follow the basic maintenance and safety tips below. And always consult the manufacturer’s detailed instructions and safety warnings before connecting and operating your generator.

• Keep ample fuel on hand
• Change oil every 100 hours of use
• Use fuel stabilizer
• Run the lines dry seasonally
• Use it at least once a month for twenty minutes
• Wash or replace filters when visibly dirty
• Store it out of the elements

NEVER, NEVER run indoors. Not even in your garage. Place fifteen feet away from your home and clear of any windows or doors before powering up.

Often, you don’t discover that you need a generator until it’s already too late. Plan ahead and invest now in a model that’ll provide all the safety and comfort of a functional home during the next emergency or power outage.