---
title: "What Is Whole-house generator? Electrical Glossary"
description: "A whole-house generator is a permanently installed, engine-driven unit that powers part or all of a home's circuits when utility power fails."
url: https://danielelectric.multisites.ai/glossary/whole-house-generator
publisher: Daniel Electric
phone: +1-817-481-8606
quote: https://danielelectric.multisites.ai/contact
---

Power and utility

# Whole-house generator

A whole-house generator is a permanently installed, engine-driven unit that powers part or all of a home's circuits when utility power fails.

Also called a [standby generator](https://danielelectric.multisites.ai/glossary/standby-generator), it sits outside and connects to the home's wiring through a [transfer switch](https://danielelectric.multisites.ai/glossary/transfer-switch). The switch keeps generator power from flowing back onto utility lines. CoServ says member generator installations must meet all local, municipal, NESC and NEC regulations.

A permanent generator needs correct sizing, a fuel supply, permits and the utility's approval. Ask a licensed electrician about each step before you buy. Run any generator only outdoors and away from windows. See [emergency electrical help](https://danielelectric.multisites.ai/guides/emergency-electrical-help).

[Daniel Electric can helpResidential electrician](https://danielelectric.multisites.ai/electrician)

## Related terms

-   [Standby generator](https://danielelectric.multisites.ai/glossary/standby-generator)
-   [Transfer switch](https://danielelectric.multisites.ai/glossary/transfer-switch)
-   [Portable generator](https://danielelectric.multisites.ai/glossary/portable-generator)
-   [Backfeed](https://danielelectric.multisites.ai/glossary/backfeed)

## Sources

1.  [CoServ: Standby Generation](https://www.coserv.com/energy-solutions/standby-generation/)
2.  [Ready.gov: Power Outages](https://www.ready.gov/power-outages)

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