The average cost of a whole-house generator installation is $5,167, ranging between $1,523 and $8,813, on average, for most homeowners. You might be surprised at how affordable powerful generators can be. . Check each product page for other buying options. Made with chemicals safer for human health and the environment. Portable generators are the least expensive, while whole-home standby generators are the most expensive due to permanent installation and automatic operation. Installation adds another $3,000 to $6,000 to the total. .
