Generator Size Cost Range (Unit Only)1 to 6 kW$500 to $1,8007.5 to 10 kW$2,000 to $3,50014 to 18 kW$4,000 to $5,50020 to 24 kW$5,000 to $6,50026 to 32 kW$6,500 to $15,00036 to 38 kW$14,000 to ...

Highlights A whole-house generator has a typical cost range of $1,524 to $8,658 and a national average cost of $5,090. The main factors that can influence the total cost include the type and size of ...