How Much Does a Generator Cost?
Most home generators cost between $400 and $23,000+, depending on the type, size, and installation. Portable generators are the least expensive, while whole-home standby generators are the most expensive due to permanent installation and automatic operation.
Here’s a quick cost snapshot:
- Portable generators: $400 to $2,500
- Inverter generators: $500 to $4,000
- Solar generators: $1,000 to $6,000
- Standby (whole-home) generators: $8,000 to $23,000 installed
- Diesel generators: $8,000 to $30,000+ installed
The total cost goes beyond the purchase price. Installation, fuel, maintenance, repairs, and expected lifespan all affect what you’ll pay over time. For example, a standby generator costs more upfront but can last 15–30 years with proper maintenance, while a portable generator is cheaper initially but typically has a shorter lifespan and requires manual operation.
Costs also vary by location. Local labor rates, fuel prices, permitting requirements, and climate conditions can all raise or lower your final price.
This guide breaks down average generator costs by type, explains the key pricing factors, and helps you choose the best generator for your home and budget.
Average Generator Costs by Type
| Generator Type | Unit Cost Range | Installation Cost Range | Total Estimated Installed Cost |
|---|---|---|---|
| Standby | $5,000 to $15,000 | $3,000 to $8,000 | $8,000 to $23,000 |
| Portable | $400 to $2,500 | $0 to $1,000 (transfer switch) | $400 to $3,500 |
| Inverter | $500 to $4,000 | $0 to $1,000 | $500 to $5,000 |
| Solar (Battery) | $1,000 to $6,000 | $0 to $2,000 | $1,000 to $8,000 |
| Dual-Fuel | $600 to $4,500 | $0 to $1,000 | $600 to $5,500 |
| Diesel | $5,000 to $20,000 | $3,000 to $10,000 | $8,000 to $30,000 |
Note: Costs vary by capacity, brand, and local labor rates.
Standby Generator Cost
Standby generators are permanently installed systems that automatically power your home during an outage. They connect directly to your electrical panel and fuel supply, making them the most reliable, but also the most expensive, generator option.
Standby generators are the most expensive option but offer unmatched convenience.
- Unit Cost: $5,000 to $15,000 depending on size and features.
- Installation: $3,000 to $8,000 for electrical, plumbing, permits, and site prep.
- Fuel: Natural gas or propane. Costs depend on local utility rates.
- Maintenance: $200 to $600/year for service contracts.
- Best Value For: Homeowners seeking full-home, hands-off backup power.
Portable Generator Cost
Portable generators are movable, fuel-powered units designed for short-term or emergency use. They must be started manually and are typically used to power a few essential appliances at a time.
Portable generators are budget-friendly and versatile.
- Unit Cost: $400 to $2,500 for gasoline or propane models.
- Installation: $0 for cord use, up to $1,000 for a manual transfer switch.
- Fuel: Gasoline or propane, varies by run time and usage.
- Maintenance: Minimal — oil changes, spark plugs, and storage prep.
- Best Value For: Occasional emergency use and outdoor activities.
Inverter Generator Cost
Inverter generators are a quieter, more advanced type of portable generator. They produce cleaner, more stable electricity, making them safer for electronics like laptops, phones, and medical devices.
Inverter generators are more expensive than standard portables per watt, but they’re quieter and safer for electronics.
- Unit Cost: $500 to $4,000.
- Installation: Usually none, but optional transfer switch up to $1,000.
- Fuel: Gasoline or propane, with high fuel efficiency.
- Maintenance: Similar to portable generators.
- Best Value For: Those who need quiet, stable power for sensitive devices.
Solar Generator Cost
Solar generators store electricity in batteries and recharge using solar panels or wall outlets. They produce no emissions and no noise, but offer limited power compared to fuel-based generators.
Solar generators have a higher upfront cost for limited capacity but no ongoing fuel expense.
- Unit Cost: $1,000 to $6,000, depending on battery size.
- Installation: $0 to $2,000 if paired with rooftop or ground-mounted solar.
- Fuel: None — recharged via solar panels or wall outlets.
- Maintenance: Very low; occasional battery replacement after several years.
- Best Value For: Eco-conscious users and off-grid applications.
Dual-Fuel Generator Cost
Dual-fuel generators can run on either gasoline or propane. This flexibility makes them useful during fuel shortages or extended outages.
Dual-fuel generator models offer fuel flexibility without a major price premium.
- Unit Cost: $600 to $4,500.
- Installation: $0 to $1,000.
- Fuel: Gasoline and propane, allowing extended runtimes.
- Maintenance: Same as portable units.
- Best Value For: Areas with variable fuel availability.
Diesel Generator Cost
Diesel generators are heavy-duty systems built for long runtimes and high power output. They are commonly used for whole-home, commercial, or industrial backup power.
Diesel units have high initial costs but a long lifespan and strong fuel efficiency.
- Unit Cost: $5,000 to $20,000.
- Installation: $3,000 to $10,000 for professional setup.
- Fuel: Diesel; efficient but may require additives in cold climates.
- Maintenance: $300 to $1,000/year for servicing.
- Best Value For: Heavy-duty, long-term power needs.
Additional Pricing Factors
- Transfer Switch: Manual ($500 to $1,000) or automatic ($1,500 to $3,000) is required for safe connection to home circuits.
- Permits: $50 to $500, depending on local regulations.
- Fuel Storage: Tanks, safety cans, or additional propane cylinders.
- Extended Warranties: Can add $200 to $1,00,0 depending on coverage.
Final Thoughts
While portable generators may be a quick, affordable fix, a standby or diesel generator is a long-term investment that offers unmatched peace of mind.
When deciding, balance upfront cost, installation complexity, fuel availability, and ongoing expenses.
A well-chosen generator can protect your home, keep your family safe, and preserve comfort during emergencies, making it one of the most important preparedness purchases you’ll ever make.
Frequently Asked Questions About Generator Costs
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