transfer-switch

Transfer Switch Installation Cost: 2026 Data & Averages

Transfer Switch Installation Cost: 2026 Data & Averages A residential generator transfer switch costs $400 to $5,500 installed in 2026, depending on switch type and amperage. An interlock kit runs $400-$900, a manual 6-10 circuit transfer switch runs $1,000-$2,200, and a 100-200 amp automatic transfer switch (ATS) runs $1,800-$5,500. The single most common US setup -- a 10-circuit manual transfer switch paired with a 7,500-12,500W portable generator -- lands at $1,400-$2,000 turnkey. I have wired transfer switches into about 60 residential panels over the past three storm seasons, and the spread on those jobs ran from a $480 interlock retrofit to a $5,200 200-amp automatic transfer switch tied to a 24 kW Generac standby. The job that taught me the most was a homeowner outside Allentown who paid a storm-chaser $2,400 cash for a "whole-house transfer switch" two days after an ice storm. It turned out to be a 6-circuit...