Best Home Backup Generators (2026): What to Buy and How to Use One Safely
When the power goes out, a backup generator can keep your lights on, your refrigerator running, and your family comfortable. But buying the wrong generator, or using one incorrectly, can cost you money or put your family in danger. Carbon monoxide from a generator running in a garage kills dozens of people every year in the United States. Choosing the right generator and knowing how to run it safely matters more than most people realize.
This guide covers everything you need to know: the different types of generators, how to figure out what size you need, which fuel options make sense, and our top picks across several categories. Whether you want a simple inverter generator for occasional use or a powerful dual-fuel unit that can run your whole house through a storm, we have a recommendation for you.
Why Trust This Guide?
This article was researched and reviewed by contributors with hands-on experience in emergency preparedness. They have tested gear, built real systems, and lived through situations where these skills actually mattered.
The Four Types of Home Backup Generators
Not all generators work the same way. Understanding the differences helps you avoid buying more than you need, or less than you need.
Conventional Portable Generators
A conventional portable generator uses a gasoline engine to spin a motor and produce electricity. They are the most common type and the most affordable. A decent conventional generator runs $300 to $800 for the sizes most homes need.
The trade-offs are real. Conventional generators are loud, often 65 to 75 decibels at 23 feet. That is similar to a lawn mower. They produce AC power that fluctuates slightly, which can damage sensitive electronics like laptops, televisions, and medical equipment if you plug those devices directly in. They also require regular maintenance: oil changes, air filter cleaning, and spark plug replacement.
For running a sump pump, a window air conditioner, a space heater, or powering basic lights, a conventional generator gets the job done at a lower price.
Inverter Generators
An inverter generator uses a more advanced electronic system to produce cleaner power. The engine still burns fuel, but the output power goes through an inverter that converts it to a stable, consistent sine wave. This is the same quality of power your home normally receives from the grid.
What this means practically: you can safely plug in laptops, phones, televisions, CPAP machines, and other sensitive electronics without worry. Inverter generators are also significantly quieter than conventional models, typically 50 to 60 decibels, which is closer to a normal conversation.
They cost more for the same wattage, usually $500 to $1,500 for home-use sizes. But if you have electronics to protect, the price difference is worth it.
Standby Generators
A standby generator is permanently installed outside your home and wired into your electrical panel. It runs on natural gas or propane and starts automatically when the power goes out, usually within seconds.
Standby generators are the most convenient option by far. You never have to haul a generator out of storage, add fuel, or run extension cords. They can power your entire home for days or weeks as long as fuel is available.
The cost is high. A standby generator capable of powering a typical home costs $3,000 to $7,000 for the unit alone, plus $500 to $3,000 for professional installation and electrical work. They require annual professional maintenance.
For homes that experience frequent extended outages or for people with medical equipment that cannot fail, standby generators are the right choice. For everyone else, a portable generator is more cost-effective.
Solar Generators (Battery Power Stations)
A solar generator is not actually a generator. It is a large rechargeable battery pack with built-in AC outlets and USB ports. You charge it from solar panels, a wall outlet, or a car charger, and then use that stored energy to run devices.
Solar generators produce no emissions, make no noise, and can be used indoors. For smaller power needs, like keeping phones charged, running a fan, powering a CPAP, or keeping a small refrigerator cold for a day or two, a solar generator is an excellent choice.
The limitation is capacity. Even the largest consumer solar generators hold around 2,000 to 3,000 watt-hours, and recharging takes many hours even with solar panels. They cannot run a whole house through a multi-day outage the way a gas generator can.
We will cover solar generators as an alternative option later in this guide, since they fill a real need for apartments, condos, and people who want a completely silent, emissions-free solution.
How Much Power Do You Actually Need?
The biggest mistake people make when buying a generator is guessing at the size they need. Buying too small means your generator shuts down from overload. Buying too large means you spent more money than necessary and carry a heavier unit.
The key numbers are running watts and starting watts.
Running watts (also called rated watts) is how much power a device consumes while it is running steadily.
Starting watts (also called surge watts) is the brief spike of power a device needs when its motor first starts. This spike only lasts a fraction of a second, but your generator must be able to handle it. A generator that cannot handle the starting surge will bog down or trip its breaker.
Motors are the main thing that causes high starting surges: refrigerators, air conditioners, sump pumps, and power tools all have electric motors that pull extra current when they start.
Wattage Reference Table
Use this table to estimate what your essential devices need.
Calculating Your Generator Size
Add up the running watts for everything you want to power at the same time. Then find the single appliance with the highest starting surge. Add that surge wattage to your total running watts. The result is the minimum starting capacity your generator needs.
Example:
- Refrigerator: 150 running watts, 600 starting watts
- Sump pump: 800 running watts, 2,150 starting watts
- 10 LED lights: 100 running watts
- Phone and laptop charging: 60 running watts
Total running watts: 150 + 800 + 100 + 60 = 1,110 watts
Highest starting surge (sump pump): 2,150 watts
Minimum generator capacity needed: 1,110 + 2,150 = 3,260 starting watts
A generator rated at 3,500 starting watts and 3,000 running watts would comfortably handle this load.
A good rule of thumb: size your generator so it runs at 50 to 75 percent of its rated capacity under normal load. Running a generator at 90 to 100 percent capacity for extended periods shortens its life and can cause overheating.
The Dual-Fuel Advantage
Many generators now come in dual-fuel versions that run on either gasoline or propane. This is a significant advantage for emergency preparedness.
Gasoline is the most common fuel and the easiest to find in normal times. It has one major problem: gasoline degrades in 3 to 6 months. If you store gas for emergencies, it needs a fuel stabilizer added, and even then it should be rotated out and replaced every 6 to 12 months.
Propane stores indefinitely. A 20-pound propane tank (the same size as a standard grill tank) holds roughly 4.7 gallons of liquid propane. Propane does not degrade over time the way gasoline does. The downside: propane produces slightly fewer watts per gallon than gasoline, and large propane storage requires more space.
With a dual-fuel generator, you can keep a couple of propane tanks stored and ready to go, knowing the fuel will still be good years later. Then if you need to run for an extended period, you can switch to gasoline bought from any gas station.
This flexibility makes dual-fuel generators a strong choice for emergency preparedness over single-fuel gasoline models.
Carbon Monoxide Safety: This Is Not Optional
Carbon monoxide (CO) is an odorless, colorless gas produced by combustion engines, including generators. You cannot smell it or see it. It kills quickly at high concentrations and slowly at lower concentrations, causing headaches, dizziness, and confusion before incapacitation.
Every year, people die from running generators in garages, basements, or close to windows and doors. The warnings on generators are not exaggerated.
The rules for generator safety:
Run your generator at least 20 feet away from any door, window, or vent. The exhaust should point away from the house. Do not run a generator inside a garage, even with the door open. Do not run it under a carport or covered porch.
CO can travel into a home even when the generator is positioned outside. Wind direction matters. If there is any doubt, move the generator farther away.
Install battery-operated carbon monoxide detectors on every floor of your home, especially near sleeping areas. Test them regularly. During a power outage and generator use, check the CO detector readings frequently.
If a CO detector alarm goes off while a generator is running: get everyone out of the house immediately and call 911. Do not go back inside to grab belongings.
A carbon monoxide detector is one of the most important safety items to have in any home using a generator. Get at least two.
Transfer Switch vs. Extension Cords
If you want to power appliances that are wired directly into your home (ceiling lights, built-in appliances, outlets in the wall), you need a transfer switch. If you want to power things using their standard plugs, you can use extension cords.
Extension Cords
Running heavy-duty extension cords from the generator to individual appliances is the simple approach. You plug the extension cord into the generator’s outlets, then plug your refrigerator, lamp, or other device into the extension cord.
This works fine for outages. Just make sure you use the right extension cord. Undersized cords overheat under heavy loads and create a fire risk. For high-draw appliances like a refrigerator, use at least a 12-gauge cord rated for outdoor use and at least 25 feet long so you can run it safely from outside. Longer runs need a heavier gauge.
Never use light-duty indoor extension cords with a generator.
Transfer Switches
A transfer switch is a panel installed next to your main electrical panel by a licensed electrician. It lets you safely connect your generator to specific circuits in your home. When you flip the transfer switch, those circuits draw power from the generator instead of the utility grid.
A properly installed transfer switch eliminates the need for extension cords. Your wall outlets, ceiling lights, and wired appliances work normally. More importantly, it prevents backfeed: if the utility power is restored while your generator is running through a transfer switch, the generator cannot push electricity back onto the grid and injure utility workers restoring power.
Backfeed is a real hazard. Running a generator connected to your home’s wiring without a proper transfer switch is illegal in most areas and can kill a utility worker.
A transfer switch kit costs $200 to $600 for the hardware, plus labor for a licensed electrician. For whole-home protection during extended outages, it is worth the investment.
Proper Fuel Storage
Safe fuel storage is an important part of generator preparedness. Gasoline is flammable and degrades over time. Storing it properly protects your family and makes sure your generator starts when you need it.
Gasoline storage rules:
Use only approved gasoline containers, typically red plastic or metal containers designed for fuel. Never store gasoline in food containers, buckets, or any unapproved vessel.
Store gasoline in a cool, well-ventilated area away from heat sources, ignition sources, and living spaces. A detached garage or shed is the right place. Do not store large quantities inside your home.
Fresh gasoline without a stabilizer starts to degrade in 30 days. Add a fuel stabilizer like STA-BIL fuel stabilizer to any gasoline you store for emergency use. STA-BIL extends storage life to 12 to 24 months depending on conditions. Always add stabilizer at the time of purchase, not after the gas has been sitting.
Keep no more gasoline than you can reasonably use in 6 to 12 months. Rotate your supply by using old gas in your car or lawn equipment and replacing it with fresh gas.
Propane storage:
Propane tanks require less maintenance than gasoline. Keep tanks outdoors or in a well-ventilated area, away from heat and ignition sources. Never store propane tanks inside your home or near an attached garage entrance.
Check propane tank valves periodically for leaks. A small container of soapy water brushed on the valve will show bubbles if there is a leak.
Our Top Generator Picks
With all of the above in mind, here are our top picks across the most common use cases.
Best Overall Value: Champion 3500W Dual-Fuel Generator
The Champion 3500W dual-fuel generator is our top pick for most homeowners. It runs on either gasoline or propane, giving you flexibility for fuel storage and emergencies. With 3,500 running watts and 4,000 starting watts, it can handle a refrigerator, a sump pump, several lights, and a phone charger simultaneously with room to spare.
Champion is a well-established generator brand with a broad service network. The 3500W model starts with an electric start (a key-start option), which makes it much easier to start than a pull-cord-only model, especially for older adults or people with limited upper body strength.
It is a conventional generator, meaning it produces power with slightly more fluctuation than an inverter. That is fine for most appliances. If you need to run a laptop or sensitive electronics, use a quality surge protector or uninterruptible power supply (UPS) as a buffer.
Key specs:
- 3,500 running watts, 4,000 starting watts
- Dual-fuel: gasoline or propane
- Electric start
- Runtime: about 9 hours on gasoline at half load, about 10.5 hours on propane
Best Budget Inverter: WEN 56200i
The WEN 56200i inverter generator is the best budget option for people who want clean inverter power in a small, lightweight package. It weighs about 48 pounds, making it easy to carry and store.
At 2,000 starting watts and 1,700 running watts, it is not built for powering a whole house. But for a weekend camping trip, running a refrigerator and some lights during an outage, or powering sensitive electronics, it does the job well. The inverter produces clean sine-wave power that is safe for laptops, phones, and medical devices.
The WEN is also one of the quietest generators in its price range, running at about 51 decibels at quarter load. That is quieter than a normal conversation.
Key specs:
- 1,700 running watts, 2,000 starting watts
- Gasoline only
- Pull-start
- Runtime: about 6 hours at half load
- Weight: 48 lbs
Best for Larger Homes: DuroMax XP5500EH
If you have a larger home or want to run a window air conditioner along with your other essentials, the DuroMax XP5500EH dual-fuel generator gives you the power headroom to do it. With 5,500 starting watts and 4,500 running watts on gasoline (or 4,275 on propane), it can handle a full load of home essentials including a mid-size window AC unit.
Like the Champion, it runs on either gasoline or propane. It also features an electric start. DuroMax generators are built to run hard for extended periods, which matters when a major storm has knocked out power for days.
The trade-off is size and weight. The XP5500EH is heavier and louder than an inverter generator. But for the power it delivers, the price is excellent.
Key specs:
- 4,500 running watts (gasoline), 5,500 starting watts
- Dual-fuel: gasoline or propane
- Electric start with pull backup
- Runtime: about 8 hours at half load on gasoline
Premium Quiet Choice: Honda EU2200i
The Honda EU2200i inverter generator is the benchmark for quiet, reliable, portable generators. Honda has been refining this design for decades and the EU2200i is the most polished version yet.
It runs at 48 to 57 decibels depending on load. That is remarkably quiet for a gas generator. It produces clean sine-wave inverter power that is safe for any electronics. The fuel efficiency is excellent, running up to 8.1 hours on a single tank of about one gallon of gasoline at quarter load.
The Honda costs significantly more than the WEN 56200i for similar output. What you pay for is Honda’s reputation for reliability and longevity. Many Honda generators last 20 or more years with proper maintenance. If you buy one good generator you want to last your lifetime, this is it.
It can also be paired with a second Honda EU2200i in parallel mode to double your output to 4,400 starting watts using an optional parallel kit. That gives you the option to start small and expand capacity later.
Key specs:
- 1,800 running watts, 2,200 starting watts
- Gasoline only
- Recoil start with auto choke
- Runtime: up to 8.1 hours at quarter load on 0.95 gallon tank
- Weight: 46.5 lbs
Solar Generator Alternatives
For people who live in apartments, condos, or anywhere running a gas generator is not practical, a solar generator is worth serious consideration.
EcoFlow DELTA 2
The EcoFlow DELTA 2 is one of the best home battery power stations available. It holds 1,024 watt-hours of energy and can output up to 1,800 watts continuously, with a 2,400-watt surge capacity. That is enough to run a small window AC for about an hour, a refrigerator for about 12 hours, or your phone and laptop for days.
The DELTA 2 uses lithium iron phosphate (LiFePO4) battery chemistry, which is rated for 3,000 charge cycles before it drops to 80 percent capacity. Charge it every week and it will last over 50 years in theory. More practically, LiFePO4 batteries are very stable and safe, with a much lower risk of thermal runaway than older lithium-ion.
It can be recharged from the wall in about 80 minutes, from solar panels (up to 500W input), or from a car outlet. The solar recharge option means that during an extended outage, as long as the sun is shining, you can keep the DELTA 2 topped off indefinitely.
No fuel. No fumes. No noise. No maintenance. For many households, this is a better choice than a gas generator.
Key specs:
- 1,024 Wh capacity
- 1,800W continuous output, 2,400W surge
- LiFePO4 battery (3,000 cycle life)
- Recharges to 80% in 50 minutes (wall)
- Accepts 500W solar input
Jackery Explorer 1000
The Jackery Explorer 1000 v2 is a popular, well-priced option for smaller power needs. It holds 1,002 watt-hours and outputs up to 1,000 watts continuously.
The Explorer 1000 is excellent for keeping phones and laptops charged, running a CPAP machine through the night, powering a mini-fridge, or running a fan for several hours. It is not built for high-draw appliances like full-size refrigerators or air conditioners.
Where the Jackery shines is usability. It is easy to understand, reliable, and well-supported. If you are new to battery backup power and want something that just works without complexity, the Jackery Explorer 1000 is a solid entry point.
Key specs:
- 1,002 Wh capacity
- 1,000W continuous output, 2,000W surge
- Charges from wall, car, or solar (200W max solar input)
- Weight: 22 lbs
Accessories You Actually Need
The generator is only part of the setup. These accessories make the difference between a generator that works when you need it and one that causes problems.
Carbon Monoxide Detectors
As covered above, CO safety is not optional. Every home using a gas generator needs working carbon monoxide detectors on every floor. Test them monthly. Replace the batteries every year. Replace the entire unit every 7 years or per the manufacturer’s recommendation.
Battery-operated CO detectors keep working during a power outage when your AC-powered units will not. Make sure at least your primary detectors are battery-powered or have battery backup.
Transfer Switch Kit
If you want to safely power circuits in your home without extension cords, a transfer switch kit is the right solution. Have it installed by a licensed electrician. This is not a DIY project for most people: mistakes in your electrical panel can cause fires or harm utility workers.
Fuel Stabilizer
If you store gasoline for your generator, STA-BIL fuel stabilizer is a must. Add it to every gas can at purchase. It extends storage life significantly and helps prevent the varnish buildup that clogs carburetors and makes generators hard to start after sitting unused.
Generator Maintenance: Keep It Ready
A generator that has not been started in a year may not start during an actual emergency. A few maintenance habits prevent this.
Run it regularly. Start your generator and let it run for 20 to 30 minutes every 2 to 3 months. Run it under load by plugging in a space heater or other appliance. This circulates oil, keeps seals from drying out, and tells you immediately if something is wrong.
Change the oil. Most generators need an oil change after the first 5 to 25 hours of use and then every 50 to 100 hours. Check the manual for your specific model. Use the oil grade specified in the manual.
Check the air filter. A dirty air filter restricts airflow and causes the engine to run rich, burning more fuel and reducing power. Inspect it every 50 hours and clean or replace it as needed.
Fresh fuel or stabilized fuel. If your generator sits for more than a month without running, the gasoline in the tank and carburetor can begin to degrade. Either run it dry (run until the engine stalls from fuel starvation, which clears the carburetor) or use stabilized fuel. For long-term storage, run it dry.
Inspect the spark plug. Each year or every 100 hours of use, pull the spark plug and inspect it. Replace it if the electrode is worn or if there is heavy carbon buildup.
These steps take less than an hour a year and dramatically reduce the chance your generator fails when you need it most.
Frequently Asked Questions
How long can a portable generator run continuously?
Most portable generators are designed for intermittent use, not 24-hour continuous operation. Plan to run yours 12 to 18 hours per day with breaks for cooling, refueling, and oil checks on extended outages. Check your manual for specific guidance.
Can I run a generator in the rain?
Generators and water are a dangerous combination. Do not run a generator in rain or snow without a proper generator tent or cover designed for ventilation. Even if you protect the generator from direct rain, never run it in a fully enclosed space.
What size generator do I need for a whole house?
A whole-house generator typically needs 5,000 to 15,000 watts depending on home size, HVAC system, and appliances. For a portable generator to power a full average home including central AC, you are looking at 7,500 to 10,000 watts or a permanently installed standby generator.
For most people, a better approach is to identify your critical appliances (refrigerator, sump pump, a few lights, phone charging) and size a generator to handle those essentials. Running your whole house costs much more and adds complexity without necessarily improving quality of life during an outage.
How much does it cost to run a generator?
A typical 3,500-watt generator at half load burns about 0.5 to 0.7 gallons of gasoline per hour. At current prices around $3 to $4 per gallon, that is $1.50 to $2.80 per hour. Running 12 hours a day costs $18 to $34 per day in fuel. For a multi-week outage, generator fuel gets expensive fast. This is another reason to size carefully and run only what you need.
Can I connect a generator to my house without a transfer switch?
Connecting a generator to your home’s wiring without a transfer switch by “back-feeding” through a dryer outlet or other method is dangerous and illegal. Do not do this. It can electrocute utility workers. Use extension cords for individual appliances or have a transfer switch professionally installed.
Summary: Which Generator Is Right for You?
If you are trying to narrow it down:
For most homeowners who want solid emergency backup at a fair price: the Champion 3500W dual-fuel generator covers your essentials with the flexibility of two fuel types.
For people who want to protect electronics and minimize noise, and do not need to run a large load: the WEN 56200i or Honda EU2200i inverter generators are the right choice.
For larger homes or anyone wanting to run a window air conditioner: the DuroMax XP5500EH gives you the wattage headroom to handle it.
For apartments, condos, or anyone who cannot use a gas generator: the EcoFlow DELTA 2 is a capable, silent, indoor-safe alternative that handles most essential loads.
Whatever you choose, pair it with a carbon monoxide detector, proper storage for your fuel, and a maintenance schedule. A generator is only useful when it works, and it is only safe when it is used correctly.
Power outages are not rare events. They happen to most households at least a few times per decade, and climate trends suggest they are becoming more frequent in many regions. Getting prepared now, before the storm hits, is always cheaper and less stressful than scrambling during an emergency.