Choosing, Fueling, and Running Them Safely
By Larry Betz | Prepared Not Paranoid https://www.preparednotparanoid.com/
Nearly 100 Americans die every year from carbon monoxide poisoning from portable generators. Not from the storm. From the machine they bought to get through it. Most of those deaths happen the same way: a generator running in a garage, a basement, or right outside an open window. Carbon monoxide has no color and no smell, and it can kill a sleeping family in hours. A generator can be the best backup power you own, but only if you follow the rules. So we'll start with generator safety, then get into choosing one, fueling it, and connecting it to your home.
In Parts 1 through 5, we covered batteries: portable power stations, solar, and home batteries. Generators are the other half of backup power. They make electricity as long as you feed them fuel, which makes them the best option for long outages, big loads, and homes without good sun.
The Rules That Save Lives
A generator engine makes carbon monoxide (CO). A small portable generator can make as much CO as hundreds of cars. Here are the rules every family needs to follow.
Carbon Monoxide Alarms Aren't Optional
If you own a generator, or use anything that burns fuel, you need CO alarms. Put one on every level of your home and outside every sleeping area. Choose battery-powered or battery-backup alarms, because a plug-in alarm is useless in a blackout. Test them when you change your clocks, and replace them on the date printed on the back.
That's what being a prepared protector looks like. You're not just buying the generator. You're making sure it can never quietly hurt the people asleep down the hall.
Know the signs of CO poisoning: headache, dizziness, nausea, weakness, confusion, and sleepiness. It can feel like the flu. If several people (or the pets) feel sick at the same time, think CO. If a CO alarm sounds or anyone feels sick, get everyone outside to fresh air right away and call 911. Don't go back in until responders say it's safe.
Buy a Generator With CO Shutoff
Many new portable generators have a built-in CO sensor that shuts the engine off automatically if CO builds up around it. Brands call it different things, like CO Shield, CO Sense, or CO Protect. Look for certification to ANSI/PGMA G300 or UL 2201. The Consumer Product Safety Commission estimates these models could cut generator CO deaths by 87 percent (G300) and up to 100 percent (UL 2201). If you're buying a generator, this feature is worth every penny.
A CO shutoff is a backup, not a permission slip. It doesn't make it safe to run a generator in a garage or near a window. Follow the rules every time.
Generator Types at a Glance
There are four main types of generators for home backup.
Here's how they compare.
Portable generators are the most common. They're affordable, they can run a lot, and you can move them where you need them. They're also loud, and you have to refuel them.
Inverter generators make cleaner, steadier power that's safe for laptops, CPAP machines, and other electronics. They're much quieter and use less fuel, because the engine slows down when you don't need full power. They cost more per watt.
Dual-fuel generators run on gasoline or propane. That flexibility matters in an emergency, when gas stations may be closed or out of fuel.
Home standby generators are permanently installed outside, like an air conditioning unit. They run on natural gas or propane, and an automatic transfer switch starts them within seconds of an outage, whether you're home or not.
Generators Worth Knowing
Champion 3,500-Watt Dual Fuel with CO Shield. A popular, affordable dual-fuel portable. On gasoline, it gives 4,375 starting watts and 3,500 running watts, and about 14 hours of runtime. On propane, it gives about 3,950 starting and 3,150 running watts. It's enough for the fridge, freezer, lights, and phones, and its CO Shield shuts it off if CO builds up.
Westinghouse WGen9500DFc with CO Sense. A big dual-fuel portable that can back up much of a home through a transfer switch. On gasoline, it gives 12,500 peak watts and 9,500 running watts. On propane, it gives 11,200 peak and 8,500 running. It has a 6.6-gallon tank that runs about 8 hours at half load, a transfer-switch-ready 30-amp outlet (L14-30R) and a 50-amp outlet, electric start with a remote key fob, a fuel gauge, low-oil shutdown, and an hour meter for maintenance. CO Sense shuts it off automatically if CO builds up.
Generac Guardian Series. Home standby generators from about 10 kW to 26 kW. They run on natural gas or propane, and an automatic transfer switch powers your home's circuits within seconds of an outage. They're known for reliability and are one of the most popular standby lines in the country.
You'll find portable generators, CO alarms, and fuel gear I recommend in my Backup Power Amazon store, linked at the bottom of this post.
How Big a Generator Do You Need?
Size a generator the same way we sized a power station in Part 2:
List what you want to run, with each item's running watts.
Add up the running watts of everything that might run at the same time.
Add the biggest starting surge. The fridge, a well pump, or an air conditioner can need two to three times its running watts for a few seconds when it starts.
Leave some room. Running a generator at about half to three-quarters of its rating is easier on the engine and saves fuel.
A fridge, freezer, furnace fan, lights, and phones fit comfortably on a 3,500-watt generator. Add a well pump or a window air conditioner, and you're in the 5,000 to 7,500-watt range. Central air and the whole house usually mean a large portable through a transfer switch, or a standby generator.
Choosing Your Fuel
The right fuel depends on where you live and what you can store.
Here's how the four fuels compare.
Natural gas comes straight from your gas line, so you never run out and there's nothing to store. It also burns cleaner than diesel. But it depends on the gas system. If a disaster damages the gas lines, or the utility shuts them off, the generator stops. It also needs professional installation.
Propane stores without going bad, burns cleaner than gasoline or diesel, and means less carbon buildup in the engine. The trade-off is that you need tanks, which take up space and need proper handling, and propane gives less power per gallon.
Diesel packs the most energy per gallon and diesel engines are built for long, heavy runs. But they make more emissions, need more maintenance, and are louder. Today, diesel is mostly used in larger and commercial generators.
Gasoline is the easiest to find, and most portable generators run on it. But it goes stale, so it needs a stabilizer and regular rotation.
Storing Fuel Safely
Storing fuel can feel like a hassle, but it pays off twice. In a long outage, it runs your generator and keeps your vehicles fueled, so you can get to work, pick up supplies, or evacuate if you need to.
Use approved containers, and store them in a well-ventilated area away from your living space, like a detached shed.
Add stabilizer when the fuel is fresh, not after it's been sitting.
Rotate your supply. Pour older gas into your car and refill the cans.
Check your local fire code, since many limit how much fuel you can store at home.
Never store fuel near the generator while it's running, or near any heat source.
Connecting a Generator Safely
There are two safe ways to get generator power into your home:
Heavy-duty extension cords run from the generator to individual appliances. Use outdoor-rated cords sized for the load, and check them for damage.
A transfer switch or interlock with an inlet box, installed by a licensed electrician, powers the circuits you choose through your home's wiring. Part 3 covers this in detail.
Never plug a generator into a wall outlet. That's backfeeding, and it can electrocute a utility worker or a neighbor and start a fire.
A Note on Wildfires and Power Shutoffs
During wildfires or emergency evacuations, authorities may tell you to shut off natural gas, propane, pilot lights, and electricity at the meter or the source to reduce fire risk. In some areas, fire departments restrict or ban generator use during high fire danger, even if you have one installed, especially portable and high-powered units. Check your local rules before fire season.
Utilities may also use Public Safety Power Shutoffs (PSPS) during high fire-risk weather, often with a day or two of notice. Sign up for your utility's alerts so you have time to fuel up, charge everything, and get ready.
Keep It Ready
A generator that won't start is just a heavy paperweight.
Run it every month or two for 20 to 30 minutes with a light load. Standby generators usually test themselves weekly.
Change the oil on the schedule in the manual. New generators often need an early oil change after the first few hours.
Keep spare oil, a spark plug, and an air filter on hand.
Practice setting it up before you need it: where it goes, how the cords run, and how the transfer switch works.
Lock it down. Generators are a top theft item after storms. A chain and a lock help.
The Hybrid System
One of the strongest setups combines solar panels, a home battery, and a fuel-powered generator. Solar charges the battery during the day. The battery runs the house at night and on cloudy days. If the battery runs low, the generator kicks in to recharge it. Each part covers the others' weak spots.
A hybrid system usually includes:
Solar panels to make power from sunlight
A battery bank to store it (usually lithium)
A hybrid inverter to manage power between the panels, battery, generator, and home
A fuel-powered generator (natural gas, propane, or diesel) for backup
A charge controller to protect the batteries
A monitoring system to track production, use, and storage
The benefits: reliability (it switches between sources on its own), energy independence (less reliance on the grid), cost savings (using stored solar during peak-price hours), and a smaller footprint (more renewable power and less fuel burned). Generac's PWRcell 2 battery system, for example, can be paired with a Generac standby generator. It's the most expensive option, but for families who can't afford to lose power, it's the most complete.
Coming Up Next
In Part 7, we'll put it all together into your family's power outage plan: who does what, what to power first, and how to protect the people who depend on you most.
Ask Yourself
Do we have working, battery-powered CO alarms on every level and outside every bedroom?
If we had to run a generator tonight, do I know exactly where it would go, at least 20 feet from the house?
How much fuel do we have, how old is it, and how long would it last?
Remember
A generator can carry your family through a long outage, but carbon monoxide doesn't give second chances. Outdoors only, at least 20 feet away, exhaust pointed away from the house. CO alarms on every level. Buy a model with CO shutoff. Never backfeed. Store fuel safely and keep it fresh. And if a CO alarm sounds or anyone feels sick, get everyone outside and call 911.
Get Started Today
FREE GUIDE: Lights Out, The Prepared Not Paranoid Blackout Plan. Generator safety rules, what to do in the first 30 minutes and the first 24 hours, what to power first, and a blackout supply checklist. Print the generator safety page and tape it to your generator. [CTA: Comment or DM "KEYWORD" / or download it here: LINK]
Go Deeper
The Family Safety Toolkit. This post helps you run a generator safely. The Toolkit gives you 20 checklists covering every area of family safety and preparedness, from your go bag and your vehicle to first aid and home safety, all for $19.99. [Get it here: https://www.preparednotparanoid.com/family-safety-toolkit]
The Family Emergency Preparedness Manual is coming soon.
Tools I recommend: The generators with CO shutoff, battery-backup carbon monoxide alarms, fuel stabilizer, approved fuel cans, and heavy-duty cords I recommend are in my Backup Power Amazon store. https://link.amazon/B0aqcCOsk
Related reading:
Backup Power, Part 3: Keep the Fridge and Freezer Running https://www.preparednotparanoid.com/pnp-library/alternative-power-lesson3
Backup Power, Part 5: Whole-House Battery Backup https://www.preparednotparanoid.com/pnp-library/alternative-power-lesson5
Home Fire Safety Essentials, Part 1: Smoke Alarms and Carbon Monoxide Detectors https://www.preparednotparanoid.com/pnp-library/home-fire-safety-smoke-co-alarms
References
U.S. Consumer Product Safety Commission. Portable Generator Safety, and "As Winter Storms Continue, CPSC Urges Families to Take Steps to Prevent Carbon Monoxide Poisoning and Fires" (2024).
Centers for Disease Control and Prevention. Carbon Monoxide Poisoning Prevention.
Portable Generator Manufacturers' Association. ANSI/PGMA G300, Safety and Performance of Portable Generators.
UL Standards. UL 2201, Carbon Monoxide Emission Rates of Portable Generators.
Westinghouse. WGen9500DFc specifications. Champion Power Equipment. 3,500-Watt Dual Fuel with CO Shield specifications.
Generac. Guardian Series and PWRcell 2.
FEMA / Ready.gov. Power Outages.
Disclaimer
These suggestions are intended to help you and your family build awareness, confidence, and safer decision-making habits. No safety plan, checklist, or training can guarantee 100% protection. This article is for general informational purposes only. Prices are rough 2026 estimates and vary by location and installer. Always follow the manufacturer's instructions and your local fire and building codes, and use a licensed electrician for any connection to your home's wiring. Affiliate disclosure: I've linked to products from my Amazon store that I personally recommend. As an Amazon Associate, I earn from qualifying purchases, at no extra cost to you. Thank you for supporting my work.
If a carbon monoxide alarm goes off or anyone feels dizzy, sick, or weak, get everyone outside to fresh air and call 911.
Awareness gives you time. Time gives you options.
The prepared protector is someone who's decided that loving someone means being ready for them, not just hoping things go fine.
Prepared Not Paranoid. Protecting the Most Vulnerable Among Us.
