The best standby generator for home backup is usually the one that matches your home’s electrical load, fuel setup, installation plan, and outage risk. For most homeowners, a 22kW to 24kW standby generator is the most practical range to compare because it can support larger essential-load setups and, in some homes, broader whole-home backup when installed correctly.
This guide compares three approved standby generator options for home backup: a 22kW Generac package with transfer switch, a larger 24kW Generac option, and a Honeywell 22kW standby generator. The best choice depends on whether you want a straightforward standby package, a higher-output option, or an alternative 22kW standby model.
Quick Picks
- Best overall for most standby-generator buyers: Generac Guardian 22kW Home Standby Generator with 200 Amp Transfer Switch, because it gives homeowners a complete 22kW standby-generator package with transfer-switch support.
- Best for larger home backup needs: Generac Guardian 24kW Home Standby Generator, because it gives buyers a higher-output standby option when 22kW may be too close to the limit.
- Best alternative 22kW standby option: Honeywell 22kW Home Standby Generator, because it gives buyers another high-ticket standby-generator option in the same general output class.
Generac Guardian 22kW Home Standby Generator with 200 Amp Transfer Switch
A 22kW standby-generator package for homeowners who want automatic home backup power with transfer-switch support.
The Generac Guardian 22kW Home Standby Generator with 200 Amp Transfer Switch is the strongest all-round option on this page for homeowners who want a standby generator designed for automatic outage protection. It is a better fit for homeowners who want a permanent installed system instead of setting up a portable generator each time the power goes out.
Best for: Homeowners who want a serious standby-generator setup for essential circuits or broader home backup.
Main advantage: The included 200 amp transfer switch makes it a more complete standby-generator package than a generator-only listing.
Main limitation: It still requires correct installation, fuel planning, placement, permits, and professional electrical work. It is not a plug-in backup solution.
Generac Guardian 24kW Home Standby Generator
A higher-output standby generator option for larger homes or buyers who want more capacity than a 22kW model.
The Generac Guardian 24kW Home Standby Generator is the better fit if your home’s backup load is likely to push close to the limits of a 22kW model. It gives you a higher-output option while staying in the same general standby-generator category.
Best for: Larger homes, heavier essential-load plans, or homeowners who want extra standby capacity after proper load sizing.
Main advantage: It offers more output than the 22kW class options, which may provide more room for larger loads depending on the final installation and load-management setup.
Main limitation: Bigger does not automatically mean better. If your essential loads are modest, a 24kW standby generator may add cost without solving a real backup-power problem.
Honeywell 22kW Home Standby Generator
A 22kW home standby generator option for buyers comparing alternatives to the main Generac Guardian models.
The Honeywell 22kW Home Standby Generator is the alternative 22kW option on this page. It suits buyers who want to compare another standby generator in the same general power class before choosing between the available Amazon listings.
Best for: Homeowners who want a 22kW standby generator alternative and are comparing product availability, price, included components, and installation requirements.
Main advantage: It gives buyers another high-ticket standby-generator option in the common 22kW home-backup range.
Main limitation: The final value depends heavily on what is included in the listing, local installation costs, transfer-switch requirements, warranty terms, and fuel setup.
What to Look For
- Start with load sizing, not brand choice. Before choosing between 22kW and 24kW, work out which appliances and circuits you actually want to back up.
- Check whether a transfer switch is included. Some standby-generator listings are more complete than others, so confirm whether the switch, controller, or installation components are part of the package.
- Think about natural gas and propane access. A standby generator is only useful if the fuel supply can support the generator during an outage.
- Plan for professional installation. Standby generators usually require electrical work, gas work, placement decisions, permits, and code-compliant setup.
- Consider load management for larger appliances. Central air conditioning, electric heating, well pumps, and large appliances may require careful planning instead of simply choosing the biggest generator.
- Compare the total installed cost. The generator price is only one part of the project. Pad preparation, wiring, fuel-line work, transfer-switch installation, and permits can change the final cost.
Final Recommendation
The best overall standby generator on this page is the Generac Guardian 22kW Home Standby Generator with 200 Amp Transfer Switch. It is the most practical starting point for many homeowners because it combines a strong 22kW standby-generator class with transfer-switch support.
The Generac Guardian 24kW Home Standby Generator is the better alternative if your home has larger backup needs or if your sizing plan shows that 22kW is too close to the limit. It is especially worth considering for larger homes, but it should still be matched to a proper load calculation.
The Honeywell 22kW Home Standby Generator is worth comparing if you want another 22kW standby option, but it should not be chosen only because it is available. Check what is included in the listing and compare the total installed cost before deciding.