Imagine a sudden, dark storm knocks out the power to your entire home. Your lights go out, your fridge stops humming, and your furnace goes silent. That sudden silence can feel unsettling, especially when you rely on electricity for comfort and safety. Choosing the right whole-house generator feels like a huge decision. You worry about the cost, the installation process, and whether you’ll pick a model strong enough to power everything you need.
It’s easy to feel overwhelmed by terms like “transfer switch” and “generator size.” Many homeowners struggle to understand the real differences between brands and types of generators. This confusion often leads to buying something too small or spending too much on features you don’t need. We understand that feeling of uncertainty.
This guide cuts through the confusing jargon. By the end of this post, you will clearly understand what a whole-house generator does, how to size one perfectly for your home, and what features truly matter. We will break down the selection process into simple, manageable steps so you can choose with confidence.
Top Generators For Whole House Recommendations
- Remote Monitoring Anywhere: With Generac 7043 22kW Mobile Link Wi-Fi connectivity, effortlessly track generator performance from anywhere. Stay updated on status and maintenance alerts, ensuring peace of mind even when you’re away
- Whole House Protection: Enjoy comprehensive coverage with Generac's 200 Amp NEMA 3R smart switch, designed for outdoor use with an aluminum enclosure. This ensures that your home remains powered and protected during power outages
- Long-Term Assurance: Backed by a 5-Year Limited Warranty, this automatic transfer switch delivers lasting performance and peace of mind, ensuring your investment in a Generac transfer switch will serve you well for years
- High-Quality 22kW Power: True Power Technology delivers clean, stable 22,000 watts with under 5% harmonic distortion. Generac’s low-maintenance engines run quieter and use less fuel for efficient, reliable home power
- Crafted for Excellence: Proudly engineered and assembled in the USA, our generators stand as testament to quality and craftsmanship. The purpose-built G-Force Engine is designed to handle the demands of usage, ensuring reliability and reduced maintenance
- Switch between gasoline (14500 surge watts, 11500 running watts), propane (12500 surge watts, 10300 running watts), and natural gas (10500 surge watts, 8750 running watts) with a simple turn of the selection dial
- Operates at 120V and 240V, making it perfect for transfer switches and emergency backup
- The WEN Watchdog CO Shutdown Sensor helps protect both you and your family by automatically turning off the generator if dangerous levels of carbon monoxide are detected
- Electric start powers the 500c 4-stroke OHV engine with the turn of a key, while the 8.2-gallon tank provides up to 12 hours of half-load runtime
- Includes four 120V 5-20R outlet, a 120V/240V transfer-switch-ready NEMA L14-30R outlet, a 120V/240V transfer-switch-ready NEMA 14-50R outlet, a 12V DC automotive outlet, a bottle of oil, a 6-foot LPG connection hose, an NG quick-connect adapter, and a three-year limited warranty
- Remote Monitoring Anywhere: With Generac 7210 24kW Mobile Link Wi-Fi connectivity, effortlessly track generator performance from anywhere. Stay updated on status and maintenance alerts, ensuring peace of mind even when you’re away
- Whole House Protection: Enjoy comprehensive coverage with Generac’s model 200 Amp SER transfer switch, designed for outdoor use with an aluminum enclosure. This ensures that your home remains powered and protected during power outages
- Long-Term Assurance: Backed by a 5-Year Limited Warranty, this automatic transfer switch delivers lasting performance and peace of mind, ensuring your investment in a Generac transfer switch will serve you well for years
- High-Quality 24kW Power: True Power Technology delivers clean, stable 24,000 watts with under 5% harmonic distortion. Generac’s low-maintenance engines run quieter and use less fuel for efficient, reliable home power
- Crafted for Excellence: Proudly engineered and assembled in the USA, our generators stand as testament to quality and craftsmanship. The purpose-built G-Force Engine is designed to handle the demands of usage, ensuring reliability and reduced maintenance
- Perfect as a backup power source for larger homes or a dependable source of portable power
- 14,500 peak watts, 11,500 running watts (gasoline); 13,500 peak watts, 10,500 running watts (propane); 12,000 peak watts, 9,500 running watts (natural gas)
- Powered by a heavy duty 550cc 4-Stroke OHV Westinghouse Engine constructed with a durable cast iron sleeve; Runs for up to 19 hours on a 9.5 gal. fuel tank with built-in fuel gauge; up to 7 hours on a 20 lb. propane tank
- Engineered with low THD, so it's safe for sensitive electronics. Power phones, computers, TVs and more. Stay connected with people, news and entertainment during power outages, or on jobsites and campsites. Durable copper windings help your generator produce cleaner power, run cooler and last longer
- All Westinghouse portable generators are gunctionally tested in the factory and may contain minimum residual oil and/or fuel odor; EPA compliant; Backed by 3-Year limited service, labor, and parts coverage and Nationwide Customer Service Network
- 9500 Running Watts and 12500 Peak Watts (Gasoline); 8500 Running Watts, 11200 Peak Watts (Propane); Remote Start with Included Key Fob, Electric and Recoil Start; Up to 12 Hours of Run Time on a 6. 6 Gallon Fuel Tank with Fuel Gauge
- Features Two GFCI 120V 5–20R 20A Standard Household Receptacle, One Transfer Switch Ready 120V L14-30R 30A, and One RV Ready 120/240V 14–50R 50A; All Outlets Have Rubber Covers for Added Safety
- Powered by a Heavy Duty 457cc Westinghouse 4-Stroke OHV Engine Featuring a Long-Lasting Cast Iron Sleeve with Automatic Low Oil Shutdown and Digital Hour Meter. VFT display gives you real time updates with the voltage output, frequency, and lifetime hours
- Plug-and-Play: Comes with a Remote Start Key Fob, 12V Battery Charger, Oil, an Oil Funnel, a Tool Kit, and a User’s Manual to Get You Started Right Out of the Box (Minimal Assembly Required)
- All Westinghouse Portable Generators are Functionally Tested in the Factory and May Contain Minimum Residual Oil and/or Fuel Odor; EPA Compliant; Backed By 3-Year Limited Service, Labor, and Parts Coverage and Nationwide Customer Service Network
- With 13,000 watts of power, the XP13000EH Dual Fuel generator will keep your whole home running during a storm or power outage
- DuroMax is the industry leader in Dual Fuel portable generator technology, with a full assortment ranging from digital inverters to generators that can power your entire home
- At the core of all our products resides a robust DuroMax engine. Designed for Power. Designed to Last
- The XP13000EH comes with a push button start, a front facing interface that allows you to change your fuel type in seconds, and a wide variety of outlets (including a transfer switch-ready 50 amp outlet)
- Constructed with a heavy-duty all metal frame and power panel - No plastic parts
- PrecisionPower Technology delivers best-in-class power quality with less than 5 percent total harmonic distortion for clean, smooth operation of sensitive electronics and appliances
- Generac's G-Force Engine is a purpose-built, pressure-lubricated engine capable of handling the rigors of generator use, resulting in power that’s more reliable and requires less routine maintenance than any competitive engine.
- Quiet-Test Self-Test Mode runs at a lower RPM for a five or twelve minute test, making generators significantly quieter than other brands while consuming less fuel.
- Smart, User-Friendly Controls. Honeywell Generator's Sync Controller features a multilingual LCD display that allows users to monitor battery status and track maintenance intervals to ensure your generator is always in top operating condition.
- Tough, Durable All-Aluminum Enclosures: Our RhinoCoat powder-coated finish helps make corrosion-resistant aluminum perfect for all weather conditions.
- Whole House Protection: Keep your family comfortable and connected during power outages. Avoid the disruption of losing refrigeration, heating/cooling, lights and connectivity of your devices with a Home Standby Generator that automatically detects an outage and delivers backup power to your home.
- Lowest Total Cost Of Ownership: Electronic fuel & ignition control optimizes fuel use for a more cost-efficient and lower emission back-up power solution* and financing options that offer you solutions that meet your budget *On average versus Generac Guardian Series standby generators
- Remote Monitoring & Control: Built-in Cellular Connectivity allows you to monitor performance and control your generator with Mobile Link app whether you're home or away. Provides real-time updates and maintenance alerts right on your device.* *Requires Mobile Link premium subscription
- Superior Reliability: Oil level sensors monitor oil level to help ensure generator readiness, support in cold climates with improved cold start performance and sloped roof & rear intake to reduce risk of ice or snow intrusion
- Compatible with the Generac Home Energy Ecosystem: Compatible with ecobee by Generac thermostats and Generac PWRcell battery systems to seamlessly monitor & control your home’s energy. Reviews on this project may contain feedback based on the 18 kW Generac Guardian Home Standby Generator.
Choosing the Right Whole-House Generator: A Simple Buying Guide
When the power goes out, a whole-house generator keeps your lights on, your fridge cold, and your comfort high. Buying one is a big decision. This guide helps you pick the best fit for your home.
Key Features to Look For
A good generator needs the right tools. Look closely at these main features:
- Power Output (Wattage): This is the most important part. You need enough power (watts) to run everything important at once—the AC, furnace, water heater, and lights. Bigger houses need more watts.
- Fuel Type: Most whole-house units run on natural gas (NG) or liquid propane (LP). Natural gas usually offers unlimited run time. Propane tanks need refilling.
- Automatic Transfer Switch (ATS): This switch senses an outage and starts the generator automatically. It’s vital for true “whole-house” convenience.
- Voltage and Phase: Most homes use single-phase power (120/240V). Make sure the generator matches your home’s electrical needs.
- Noise Level (dB): Generators make noise. Look for models rated under 70 decibels (dB) if you have close neighbors.
Factors That Improve Quality
Higher quality often means longer life and better performance. Look for brands that use durable parts. Liquid-cooled engines generally last longer than air-cooled ones, similar to a car engine. Good warranty coverage also signals a high-quality product.
Factors That Reduce Quality
Cheaply made components break faster. Thin metal casings rust easily. Generators that are hard to service or require specialized tools often lead to higher repair bills later. Be wary of overly low prices.
Materials Matter
The materials used directly affect how long your generator lasts outside in the weather.
- Enclosure: The outer shell protects the engine. Look for corrosion-resistant materials like powder-coated aluminum or heavy-gauge steel. This keeps rain and rust away.
- Engine Components: Brass or copper components in the engine handle heat better than plastic parts.
User Experience and Use Cases
How you use the generator shapes your choice.
For the Average Family Home:
A mid-range unit (10kW to 16kW) usually covers essentials like refrigerators, lighting, and basic HVAC use. The user experience here focuses on quiet operation and reliability during short storms.
For Large Homes or Medical Needs:
If you have electric heat pumps, multiple air conditioners, or rely on medical equipment, you need a high-capacity unit (18kW+). For these users, the transfer switch must work perfectly every time. Quick startup time is critical for medical devices.
Installation is a big part of the user experience. Professional installation ensures the gas line and electrical connections are safe and correct. Always hire licensed professionals to set up your system.
10 Frequently Asked Questions (FAQ) About Whole-House Generators
Q: How much power (watts) do I actually need?
A: You need to total the running watts of your biggest appliances, like your central air conditioner, plus the lights and fridge. Most homes need between 10,000 and 20,000 watts.
Q: Is natural gas or propane better?
A: Natural gas offers continuous fuel from your utility line, so you never run out. Propane is portable but requires you to monitor tank levels.
Q: How loud are these generators?
A: Modern standby generators usually run between 50 dB (very quiet, like a dishwasher) and 70 dB (like a vacuum cleaner) when running under a load.
Q: Do I need a permit to install one?
A: Yes. Because generators connect to your home’s electrical panel and gas line, local building and electrical permits are almost always required.
Q: How often should I run a test?
A: Most modern units run an automatic weekly test cycle for about 15 minutes. This keeps the engine parts moving and ensures it is ready to go.
Q: What is the average lifespan of a whole-house generator?
A: With regular maintenance, a good quality standby generator can last 20 to 25 years.
Q: Can I use a portable generator instead?
A: Portable generators require manual setup and only power specific circuits via extension cords or a manual transfer switch. They do not offer the automatic, whole-house protection of a standby unit.
Q: What maintenance is required?
A: Maintenance is similar to a car. You need regular oil changes, filter replacements (air and oil), and spark plug checks, usually performed by a certified dealer.
Q: What is the typical cost of installation?
A: The total cost varies greatly based on the size of the unit and how difficult the gas line hookup is. Expect costs ranging from $4,000 to $12,000 installed.
Q: Does the generator protect against surges?
A: No. Standby generators provide backup power when the grid fails. They do not protect sensitive electronics from incoming voltage spikes when the power returns.