Generator Transfer Switch
A switch that safely transfers selected household circuits between utility power and a backup generator, preventing dangerous backfeed.
Quick answer
Generator Transfer Switch: A switch that safely transfers selected household circuits between utility power and a backup generator, preventing dangerous backfeed. Typical cost: $400–$1,500 for manual switch installed; $2,000–$4,500 for automatic..
Why it matters
Plugging a generator into a regular outlet (backfeeding) can kill utility workers and is illegal. A transfer switch is required for any safe backup setup.
Typical cost
$400–$1,500 for manual switch installed; $2,000–$4,500 for automatic.
Pros
- • Code-required for backup generators
- • Automatic versions self-start during outages
Cons
- • Adds significant cost to generator setup
Common uses
- • Homes with portable or standby generators
Alternatives
Interlock kit (cheaper, manual)
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Frequently asked questions
- Interlock vs transfer switch?
- Interlock is cheaper and lets you use any panel circuit; transfer switch is dedicated and code-compliant in more jurisdictions.
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