A reliable home generator can keep essential appliances, heating or cooling systems, refrigerators, lights, and other critical equipment running when the power goes out. But the best generator for your home depends on how much power you need, how long you expect outages to last, and whether you prefer gasoline, propane, dual-fuel, or battery-based backup.
In this guide, we compare five home generators for different backup-power needs, from compact inverter models for essential appliances to high-output generators designed to support more demanding loads. We also explain how to choose the right generator size, compare fuel options, understand runtime and noise levels, and use a generator safely during an outage.
We compared these generators across power output, fuel flexibility, portability, noise, safety features, value, and suitability for different outage scenarios.
A strong all-around choice for homeowners who want substantial backup capacity and dual-fuel flexibility.
A compact option for essential loads, electronics, refrigeration, lighting and smaller backup needs.
A versatile middle-ground option when you want inverter technology and dual-fuel flexibility.
High-output backup with gasoline, propane and natural-gas flexibility for demanding loads.
A permanently installed option for homeowners who want automatic backup rather than a portable unit.
Choosing a home generator starts with one question: how much power do you actually need during an outage?
A larger generator isn't automatically better. Buying more capacity than you need can mean paying more upfront, using more fuel, and dealing with a heavier and noisier machine. On the other hand, a generator that's too small may overload when appliances start up.
The right choice is to identify the appliances and systems you want to keep running, add their running wattage, and then account for the additional power some appliances need when they start.
Generators are typically rated using two numbers:
- Running watts — the amount of power the generator can continuously supply.
- Starting watts — the temporary surge of power available when an appliance with a motor or compressor starts.
Not sure what happens inside a generator when it converts fuel into usable electricity? Our guide to how a generator produces electricity explains the basic components and power-generation process.
For example, a refrigerator may only need a few hundred watts while operating but require considerably more power for a moment when its compressor starts.
This means you shouldn't simply add up the normal operating wattage of your appliances. The generator needs enough capacity to handle the highest starting demand as well as the ongoing load.
The table below gives a rough idea of what different generator capacities can handle. Actual requirements vary considerably by appliance and model, so use the manufacturer's specifications when calculating your home's load.
These ranges are only a starting point. A home's actual requirement depends on the appliances being used simultaneously and their starting loads.
Suppose you only want to keep the following running during an outage:
- Refrigerator
- Freezer
- Several LED lights
- Wi-Fi router
- Television
- Laptop and phone chargers
You may not need a 10,000W+ generator. A smaller inverter generator could potentially handle this type of essential-load setup, provided its running and starting capacity is sufficient.
The advantage is that a smaller generator can be less expensive, easier to move, and quieter, while also using less fuel.
The calculation changes if you also want to operate equipment such as:
- Central air conditioning
- Electric heating
- Well pumps
- Sump pumps
- Electric water heaters
- Large refrigerators or freezers
These appliances can have substantially higher power requirements, particularly during startup.
That's where a 7,000W, 10,000W, or larger generator may make more sense.
However, you don't necessarily need to power everything simultaneously. One way to reduce the required generator size is to identify which appliances are genuinely essential during an outage and avoid running several high-demand appliances at the same time.
Start by making a list of everything you want to operate during an outage.
Step 1: Add the running watts of the appliances you expect to use simultaneously.
Step 2: Identify which appliances have significant starting-watt requirements.
Step 3: Make sure the generator has enough running capacity for the continuous load and enough starting capacity for the largest startup surge.
Step 4: Leave some headroom rather than operating the generator continuously at its maximum rated output.
For a more precise calculation, check the wattage listed on each appliance or consult its manufacturer's specifications.
It's tempting to assume that the biggest generator is the safest choice. But generator size should match your intended load, not the size of your house alone.
A homeowner in a large house who only wants to run a refrigerator, freezer, lights and internet during an outage may have very different requirements from someone in a smaller house who wants to operate central air conditioning, an electric water heater and a well pump.
The best home generator is therefore not necessarily the one with the highest wattage. It's the one that provides enough capacity for your essential loads without paying for substantially more capacity than you need.
Once you know how much power you need, the next decision is what type of generator you actually want.
For most homeowners, the choice comes down to a portable generator or a permanently installed standby generator. Neither is automatically better. The right option depends on your budget, how often you experience outages, how much of your home you want to power, and whether you want the generator to start automatically.
Portable generators are usually the more flexible and affordable option. You can store one until it's needed, move it where required, and choose from models ranging from compact inverter generators to high-output machines capable of supplying several household circuits.
They're particularly useful if you want to keep essential appliances running rather than power your entire home. A smaller inverter generator, for example, may be enough for a refrigerator, lights, Wi-Fi equipment and electronics, while a larger 8,000–12,000W+ model can support substantially more demanding loads.
The main drawback is that portable generators require more involvement. You'll generally need to take the generator outside, start it, connect your loads, monitor fuel and shut it down when the outage ends.
If you connect a portable generator to your home's electrical system, you also need the appropriate equipment and installation. The U.S. Consumer Product Safety Commission's generator safety guidance explains the risks of improper connections, including dangerous electrical backfeeding.
Best for: homeowners who want flexibility, lower upfront cost and enough power for essential or selected household loads.
Standby generators are permanently installed outside the home and connected to the home's electrical system and a fuel supply.
The major advantage is automation. With an automatic transfer switch, the system can detect a utility outage, disconnect the home from the grid, start the generator and transfer power to the backed-up circuits. When utility power returns, the system can switch back and shut the generator down automatically.
That makes standby generators particularly attractive if you:
- Experience frequent or prolonged outages
- Don't want to manually set up a generator
- Need to maintain power to several major household systems
- Want backup power that works even when you're away from home
The trade-off is cost. The generator itself is only part of the expense. You also need to consider installation, electrical work, fuel connections and potentially permits or inspections, depending on where you live.
Best for: homeowners who want automatic backup and are willing to pay more for a permanent system.
"Whole-home generator" doesn't necessarily mean the generator can power every appliance simultaneously.
The important question is whether its output is sufficient for the loads you intend to operate. A large standby generator may be able to support most or all of a home's electrical loads, while a portable generator connected through an appropriate transfer system may be configured to power only selected circuits.
That's why generator sizing should come before choosing between models. A 10,000W portable generator could be a better fit for one household than a much more expensive standby system, while another home may benefit substantially from automatic whole-home backup.
A simple way to think about it:
Choose a portable generator if you:
- Want to spend less
- Experience occasional outages
- Mainly need essential appliances
- Want the ability to move or store the generator
- Don't mind starting and monitoring it yourself
Choose a standby generator if you:
- Experience frequent or lengthy outages
- Want automatic operation
- Need more extensive household backup
- Don't want to manually set up the generator during an outage
- Are comfortable with the higher installation cost
One final consideration is where a portable generator can be operated. Combustion generators must be used outdoors because of carbon-monoxide risk. The CPSC recommends operating portable generators at least 20 feet from the home, with the exhaust directed away from the building.
Bottom line: A portable generator is usually the better choice when you want affordable, flexible backup for essential loads. A standby generator makes more sense when automatic operation and extensive home backup are the priorities.
Once you've decided between a portable and standby generator, fuel type is the next major decision. The fuel you choose affects availability, storage, runtime, operating cost, and how practical the generator is during a prolonged outage.
There isn't one universally best fuel. The right choice depends largely on what is readily available to you and how long you expect to rely on backup power.
Gasoline is one of the most common fuels for portable generators and is particularly convenient for short-term outages.
Advantages:
- Widely available
- Works with many portable generators
- Good power output
- Convenient for occasional use
Disadvantages:
- Requires safe fuel storage
- Gasoline can degrade during long-term storage
- Availability can become an issue during major emergencies
- Combustion generators require outdoor operation
For occasional outages, gasoline can be perfectly practical. If you're preparing for potentially long outages, however, fuel storage and availability become more important considerations.
Propane is another common option, particularly for backup generators that may sit unused for extended periods.
One advantage is that propane can generally be stored for longer periods than gasoline when stored correctly. It can also be useful for homeowners who already keep propane tanks on their property.
The trade-off is that propane typically provides less energy per unit of fuel than gasoline, meaning generator output and runtime can differ depending on the model and operating conditions.
Best for: homeowners who value longer-term fuel storage and already have access to propane.
Dual-fuel generators give you the ability to operate on gasoline or propane.
This flexibility can be particularly useful during an extended outage. If gasoline becomes difficult to obtain, you may be able to switch to propane instead.
For many homeowners, that's one of the biggest reasons to consider a dual-fuel generator.
You also don't necessarily have to choose one fuel permanently. Gasoline may be convenient when maximum output is important, while propane can be attractive when storage and availability are higher priorities.
Best for: homeowners who want flexibility and an additional fuel option during an emergency.
Tri-fuel generators add natural gas to gasoline and propane.
That can be particularly attractive for homeowners who already have a natural-gas connection. Unlike gasoline or propane tanks, natural gas can be supplied through the home's existing utility connection, potentially making it much more convenient during a prolonged outage.
However, natural gas generators can have different power output and performance characteristics depending on the model, so don't assume the generator produces the same wattage on every fuel.
If you're considering a tri-fuel model, check the manufacturer's specifications for running and starting watts on each fuel.
Best for: homeowners who want maximum fuel flexibility, particularly those with an existing natural-gas connection.
Despite the name, a solar generator isn't technically a fuel-powered generator.
Most products marketed as solar generators are actually portable solar generators with panels that store electricity and can be recharged from solar panels, wall outlets or other sources
They have some major advantages: they're quiet during operation, produce no exhaust at the point of use, and can be useful for electronics, refrigeration and other smaller loads. However, their usefulness during a long outage depends on battery capacity, recharge options and the amount of power you're consuming.
For larger home backup requirements, a fuel-powered generator can provide considerably more continuous energy as long as you have access to fuel.
If you're specifically interested in battery-based backup, see our guide to the best solar generators for home backup.
For most portable-generator buyers, dual-fuel is a particularly practical middle ground. It gives you the convenience of gasoline while providing propane as a second option if fuel availability becomes an issue.
If your home already has natural gas and you want maximum fuel flexibility, a tri-fuel generator can be even more attractive.
The important thing is not simply choosing the fuel with the lowest theoretical operating cost. Fuel availability during an actual outage may matter more than small differences in efficiency.
There is no single best home generator for every household. The right choice depends on how much power you need, how long outages typically last, what fuel you have available, and whether you want to operate the generator yourself or have backup power start automatically.
Rather than choosing the generator with the highest wattage, start with the type of backup you actually need.
If your main priority is keeping a refrigerator, lights, Wi-Fi, phones, laptops and other essential electronics running, a smaller inverter generator may be all you need.
These generators are typically easier to move, quieter and more fuel-efficient than larger open-frame models. The trade-off is limited power capacity, so they aren't suitable for running several large appliances simultaneously.
If you're looking for a quieter option specifically for RV use, see our guide to the best quiet generators for RVs.
Best for: essential loads, occasional outages, smaller homes and anyone who prioritizes quiet operation and portability.
These same characteristics can also make smaller inverter generators a good fit for camping. If you're choosing a generator primarily for outdoor use, see our guide to the best generators for camping.
A larger portable generator makes sense if you want to operate multiple household appliances or higher-demand equipment during an outage without moving to a permanently installed system.
Depending on its output and your home's electrical setup, a larger portable generator can support appliances such as refrigerators, freezers, lights, sump pumps and selected heating or cooling equipment.
The key is to calculate your running and starting wattage rather than assuming you need a certain generator size based on the size of your home.
Best for: homeowners who want substantial backup power without the cost and permanence of a standby system.
A dual-fuel generator can operate on gasoline or propane, giving you an additional option when fuel availability becomes a concern during a prolonged outage.
Gasoline can provide strong output and is widely available, while propane can be convenient for longer-term storage. Having both options means you're not dependent on a single fuel source.
Best for: homeowners who want flexible portable backup and additional fuel security.
Tri-fuel generators add natural gas to gasoline and propane.
This can be particularly useful during extended outages if your home already has a natural-gas connection. Instead of relying entirely on stored fuel, you may be able to use the existing gas supply, depending on your setup and local conditions.
Keep in mind that generator output can vary depending on the fuel being used, so check the manufacturer's specifications rather than assuming the rated wattage is identical across all three fuels.
Best for: homeowners with natural-gas access who want maximum fuel flexibility for longer outages.
If you don't want to manually move, start and connect a generator every time the power goes out, a permanently installed standby generator is the most convenient option.
Standby systems can work with an automatic transfer switch to detect a utility outage and switch the home's backed-up circuits to generator power automatically. They're particularly attractive for homeowners who experience frequent or prolonged outages or need backup for major household systems.
The downside is cost: installation, electrical work, fuel connections and other requirements can make a standby system substantially more expensive than a portable generator.
Best for: frequent outages, extensive household backup and homeowners who prioritize automatic operation.
If you don't need to run high-demand appliances for long periods, a battery power station with solar charging can be another option.
Unlike a conventional fuel-powered generator, a battery system produces no exhaust during operation and is virtually silent. However, its usefulness during a prolonged outage depends on battery capacity and your ability to recharge it.
Best for: electronics, smaller appliances, quiet operation and households looking for an alternative to fuel-powered backup.
The best home generator isn't necessarily the largest, most powerful or most expensive model. It should provide enough capacity for the loads you actually need, use a fuel that's practical for your situation, and offer the level of convenience you're looking for.
For occasional outages and essential appliances, a portable inverter generator may be enough. If you need more power, a larger dual- or tri-fuel portable model can provide greater flexibility. And if you want backup power to operate automatically, a standby generator is usually the better fit.
Once you've decided which type of generator fits your home, the next step is comparing the best models within that category.
Using a generator safely is just as important as choosing the right model. Improper operation can cause carbon-monoxide poisoning, fires, electric shock, or dangerous backfeeding into the electrical grid. Follow the generator manufacturer's instructions and these basic safety precautions whenever you operate a fuel-powered generator.
The most important rule is simple: never operate a portable fuel-burning generator inside your home, garage, basement, crawlspace, shed or another enclosed or partially enclosed area.
Generators produce carbon monoxide (CO), an odorless and colorless gas that can become deadly very quickly. Opening doors or windows does not provide enough ventilation to make indoor operation safe.
The CPSC recommends operating portable generators at least 20 feet from the home, with the exhaust directed away from the building and away from doors, windows and other openings.
Your home should have functioning CO alarms on every level and outside sleeping areas, preferably with battery backup so they continue operating during a power outage.
Test them regularly and replace batteries as recommended by the manufacturer. If a CO alarm sounds, or anyone develops symptoms such as headache, dizziness, weakness, nausea or confusion, get outside into fresh air immediately and seek emergency assistance.
If you want to power household circuits rather than individual appliances, the generator needs to be connected using the appropriate transfer equipment installed according to local electrical requirements.
Never attempt to energize your home's wiring by plugging a generator into a household outlet. Improper connections can cause dangerous backfeeding, potentially putting utility workers and others at risk. FEMA recommends using a qualified electrician to install the appropriate transfer equipment.
For appliances connected directly to a portable generator, use properly rated, heavy-duty extension cords and follow the generator manufacturer's instructions.
Generators and electricity don't mix well with water. Operate the generator according to the manufacturer's instructions regarding wet conditions and electrical-shock protection.
Don't place a generator where rainwater can collect around it, and don't improvise an enclosure that could restrict ventilation or allow exhaust to enter the home. FEMA's guidance specifically warns about shock and electrocution risks when generators are used in wet conditions.
Never refuel a running generator. Turn it off and allow the engine to cool before adding gasoline or other liquid fuel. Spilling fuel onto a hot engine can create a fire hazard.
Store fuel only in appropriate containers and in accordance with local requirements and the manufacturer's instructions.
Keep track of the appliances connected to the generator and stay within its rated running and starting capacity.
Running too many high-demand appliances simultaneously can overload the generator and cause it to shut down or potentially damage equipment.
If power is limited, prioritize essential loads first—such as refrigeration, medical equipment, lighting and communications—rather than trying to run everything in the house at once.
The best time to discover that your generator won't start is before the power goes out.
Follow the manufacturer's maintenance schedule and periodically check:
- Engine oil
- Fuel system
- Battery, if equipped
- Starting system
- Extension cords and connections
- CO shut-off and other safety features
- General condition of the generator
The CPSC recommends regularly checking and maintaining portable generators and following all manufacturer instructions and warnings.
Before running a generator during an outage, make sure:
- It's outdoors and at least 20 feet from the home
- Exhaust is pointed away from the building
- CO alarms are working
- The generator is protected from unsafe wet conditions
- It's connected using the correct equipment
- The generator isn't overloaded
- The engine is off and cool before refueling
- You are following the manufacturer's instructions
Generator safety is not an optional consideration when choosing backup power. A generator that provides excellent performance is only useful if it can be operated safely.
For the most current safety guidance, readers can also refer to the U.S. Consumer Product Safety Commission's generator safety guidance and FEMA's generator safety guidance.
The best home generator is the one that matches your actual backup needs, not simply the model with the highest wattage. Think about what you need to keep running, how often outages occur, your preferred fuel, and how much convenience you want.
Before you make a decision, use the checklist below to make sure you've covered the key factors that can affect your choice.
