Generac generator costs usually range from $500 to $2,500 for portable units, $4,000 to $10,000 for automatic home standby generators, and $8,000 to $16,000 for many professionally installed systems.
How much Generac generators cost can change based on the generator type, generator size, fuel setup, transfer switch, electrical work, permits, and site conditions. A full standby system costs more because it connects to the home’s electrical system and often runs on natural gas or propane.
Installation can add several thousand dollars to the project, so the unit price should not be confused with the full installed cost.