A baby cow is called a calf. Adult male cows are called bulls. Adult female cows are called heifers until they give birth; after they have given birth, they are called cows.
As long as there is a fuel supply of natural gas or propane, a well-maintained backup generator will keep running. If the Generac generator is running on propane, with a 500-gallon tank, it should run 24 hours a day for over a week. How loud are they? Generac generators are very quiet.
Home Standby Generators. 1  Generac Guardian 22,000-Watt (LP)/19,500-Watt (NG) Standby Generator with Automatic Transfer Switch. 2  Generac Guardian 16,000-Watt (LP)/16,000-Watt (NG) Standby Generator with Automatic Transfer Switch. 3  Generac Guardian 11,000-Watt (LP)/10,000-Watt (NG) Standby Generator with Automatic Transfer Switch.