Quick answer: A portable generator is usually the lower-cost way to keep a short list of essentials running, but the equipment price is only part of the budget. Angi’s current consumer guide places portable units at roughly $500 to $3,000. A permanently installed standby system is a different project: HomeAdvisor lists a broad $5,000 to $25,000 range depending on capacity, installation and site work.
Do not compare those ranges as if both options provide the same coverage. A portable setup may need cords, inlet or transfer equipment, electrician work, protected outdoor placement, fuel storage and manual startup. A standby project can include equipment, an automatic transfer switch, fuel work, electrical labor, permits, site preparation and commissioning.
Safety first: CPSC says portable generators should operate outdoors only, at least 20 feet from the home, with exhaust directed away from doors, windows and vents. Never run one in a house, garage, basement, porch or carport.
What the Cost Ranges Actually Cover
| Option | Planning range | What may be separate |
|---|---|---|
| Portable generator | About $500–$3,000 for the unit | Transfer equipment, electrician work, cords, fuel, storage, weather protection |
| Standby generator | About $5,000–$25,000 project range | Depends on whether pad, trenching, fuel connection, permits and panel work are included |
National planning ranges are not local quotes. Labor, permits, fuel availability, climate, property setbacks, electrical-panel condition and the loads you want to carry can materially change the project.
Start With Loads, Not the Generator Label
Write down the devices that truly need power. Common priorities include a refrigerator, sump pump, selected lights, communications, medical equipment, a well pump and limited heating or cooling. Record each device’s running watts and starting surge from the manufacturer label or manual.
Do not simply add every appliance in the home. The better question is which loads must run at the same time. A qualified electrician or installer should size hard-wired equipment and transfer arrangements.
Portable vs. Standby: Decision Guide
- Choose portable when you can safely operate equipment outdoors, can refuel and start it manually, need only selected loads and accept temporary cords or approved transfer equipment.
- Choose standby when automatic startup matters, outages are frequent or long, larger hard-wired loads are essential and the higher installation/maintenance budget is justified.
- Consider battery backup when silent operation, short-duration essential loads or avoiding fuel storage matters—but verify capacity and output against the actual load profile.
Build a Complete Quote
For a portable setup, separate the generator, inlet, transfer switch or interlock where permitted, cords, weather protection, electrician labor, permits and load testing. For standby, separate the generator, transfer switch, pad, trenching, fuel work, electrical work, permits, startup, monitoring and maintenance.
Also ask what is excluded. Panel replacement, gas-meter upgrades, a larger propane tank, long trench runs, difficult access and restoration of landscaping or concrete can move a quote.
Illustrative Cost Scenario
Suppose a homeowner compares a $1,200 portable unit plus a hypothetical $900 for approved connection equipment and electrician work. The subtotal is $2,100 before fuel, storage, maintenance and taxes.
Now compare a hypothetical $12,000 standby proposal that includes the unit, transfer switch, installation, fuel connection, permit and commissioning. Those numbers are examples, not market averages. The point is to avoid comparing a product sticker price with a complete installed project.
Safety and Installation Limits
- Operate portable generators outside only, at least 20 feet from the home.
- Point exhaust away from doors, windows and vents.
- Use working carbon-monoxide alarms.
- Never backfeed a home by plugging a generator into a wall outlet.
- Follow manufacturer guidance for wet-weather operation.
- Use qualified professionals for transfer equipment, panel work and permanent fuel connections.
Questions to Ask Before You Sign
- Which loads and starting surges did you size?
- What transfer equipment is included?
- Are permits, fuel work, trenching and restoration included?
- Where will the unit operate, and does that location satisfy clearances?
- What maintenance schedule and annual cost should I expect?
- What fuel supply is assumed during a multi-day outage?
- What warranty covers equipment, labor and travel?
FAQ
How much does a portable generator cost?
Angi’s current comparison places portable models around $500 to $3,000 before project-specific accessories and electrical work.
How much does a standby generator cost installed?
HomeAdvisor lists a broad $5,000 to $25,000 standby-generator range. Confirm whether your written quote includes the transfer switch, installation, fuel connection, permits, pad and site work. The benchmark is not an all-inclusive quote for your property.
Can a portable generator run inside a garage with the door open?
No. CPSC says portable generators should run outside only, at least 20 feet from the house, away from doors, windows and vents.
Related Reading
- Sump Pump Replacement vs. Battery Backup Cost
- How to Compare Three Contractor Quotes
- Homestria Calculators
Sources and Scope
U.S. residential planning guide. Generator equipment was not personally tested or installed. Cost ranges are consumer planning benchmarks, not bids. Sources checked September 12, 2026 KST: Angi generator comparison, HomeAdvisor generator cost guide, and CPSC generator safety guidance.