Portable Generator vs. Whole-House Standby Generator
Backup power generally comes from a portable generator you set up manually during an outage, or a whole-house standby system permanently installed and wired to start automatically.
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Portable Generator
A movable generator, fueled by gas or propane, that's set up and connected manually during an outage.
- Significantly lower upfront cost
- Can be used for other purposes (camping, job sites) beyond home backup
- Requires manual setup and fueling during an outage
- Typically only covers select circuits, not the whole home
- Must be operated outdoors, away from the house, for safety
Whole-House Standby Generator
A permanently installed generator, connected to the home's electrical panel, that starts automatically within seconds of an outage.
- Starts automatically, even when no one is home
- Can cover the entire home's electrical load, not just select circuits
- No manual setup or outdoor fueling required during an outage
- Significantly higher upfront cost
- Requires a dedicated fuel line connection (natural gas or propane tank)
- Professional installation and permitting generally required
Which one makes sense for you?
A portable generator costs significantly less and offers flexibility, but requires manual setup and typically covers only select circuits. A whole-house standby generator costs much more upfront but starts automatically and can cover the entire home — generally worth it for homes with frequent or extended outages, or where no one may be home to set up a portable unit.
Key cost factors.
- Budget available for upfront cost
- How much of the home's power needs to be covered
- Whether the home is occupied during typical outage times
- Available fuel source for a permanent installation
Before you decide.
- Would we be home to set up a portable generator during a typical outage?
- How much of our home's electrical load actually needs backup coverage?
- Is a natural gas line or propane tank realistically available for a standby system?
Frequently asked questions.
Can a portable generator power an entire house?
Generally no — most portable generators are sized to cover select essential circuits (refrigerator, some lights, a furnace) rather than a home's full electrical load, which is one of the main differences from a whole-house standby system.
All figures on this page are illustrative examples for general education, not quotes, appraisals, or guarantees of actual pricing. Actual costs vary by provider, location, project scope, and market conditions — always get a specific quote before making a purchasing decision.
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