Backup power generators for homes are devices that provide emergency power in case of a power outage. They can be either backup generators, which are not permanent installations and require manual start and extension cords1, or standby generators, which are permanently installed and automatically detect and supply power. Backup power generators vary in size, power, fuel, and reliability. The power needs of a home depend on the number and type of appliances that need to be run. Air-cooled generators are the typical choice for back up power generators residential power, but liquid-cooled generators can provide more power. Generac created the home backup generator category. Today, our generators are preferred by 8 out of every 10 homeowners who invest in home backup power. A permanently installed Generac home backup generator protects your home automatically.