How Much Does a Generator Cost? Average Price by Type

How Much Does a Generator Cost?

Home generators cost $400 to $23,000+ installed. Portable models start around $400, while whole-home standby systems installed by a licensed electrician run $8,000 to $23,000. Price depends mainly on generator type, power output (wattage), and whether professional installation is required.

Generator cost by type, at a glance:

Portable generators: $400 to $2,500
Inverter generators: $500 to $4,000
Dual-fuel generators: $600 to $4,500
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 purchase price is only part of the total. Installation, fuel, maintenance, repairs, and lifespan all factor into what you’ll actually pay over time. A standby generator costs more upfront but can last 15–30 years with proper maintenance; a portable generator costs less initially but has a shorter lifespan and requires manual operation during every outage.

Location matters too — local labor rates, fuel prices, permitting requirements, and climate all shift your final price up or down.

This guide breaks down average generator costs by type, the key factors that drive price, and how to pick the right generator for your home and budget.

Quick take: Most homeowners looking for basic outage protection spend $500–$2,500 on a portable or inverter unit. Homeowners who want automatic, whole-home coverage typically spend $8,000–$15,000 installed.

Average Generator Costs by Type

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: $8,000–$23,000 Installed

A standby generator is a permanently installed system that automatically detects a power outage and switches on within seconds — no manual setup required. It connects directly to your home’s electrical panel and to a fuel line (natural gas or propane), making it the most reliable and most expensive generator option.

Residential standby generator on concrete pad

Standby generators cost the most upfront but deliver hands-off, whole-home coverage.

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.
Lifespan: 15 to 30 years with regular maintenance.
Best Value For: Homeowners seeking full-home, hands-off backup power.

Portable Generator Cost: $400–$2,500

A portable generator is a movable, fuel-powered unit you manually start and plug appliances into during an outage. It typically powers a handful of essential items at once, like a fridge, some lights, and a sump pump, rather than the whole house.

Portable electric generator running in the cold winter.

Portable generators are the most budget-friendly and versatile option on this list.

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.
Lifespan: 5 to 10 years with regular maintenance.
Best Value For: Occasional emergency use and outdoor activities.

Inverter Generator Cost: $500–$4,000

An inverter generator is a quieter, more advanced type of portable generator that produces cleaner, more stable electricity — the kind of power that’s safe for laptops, phones, and medical devices without risk of damage from voltage fluctuations.

Using Portable Gasoline Inverter Generator While Dry Camping in a Camper Van.

Inverter generators cost more than standard portables per watt, but they run quieter and protect electronics better.

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.
Noise Level: 50–65 decibels — roughly conversation volume.
Best Value For: Anyone who needs quiet, stable power for sensitive devices.

Dual-Fuel Generator Cost: $600–$4,500

A dual-fuel generator can run on either gasoline or propane, switchable on demand. That flexibility matters most during extended outages or regional fuel shortages, when one fuel type may be easier to find than the other.

Dual-fuel portable generator connected to a propane tank

Dual-fuel models offer fuel flexibility without a major price premium over standard portables.

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.

Solar Generator Cost: $1,000–$6,000

A solar generator stores electricity in a battery pack and recharges via solar panels or a wall outlet. It produces zero emissions and zero noise, but delivers less total power than fuel-based options, so it’s better suited to essentials than whole-home backup.

Solar generator charging with expanded solar panels

Solar generators cost more upfront for the capacity they offer, but have 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.

Diesel Generator Cost: $8,000–$30,000+ Installed

A diesel generator is a heavy-duty system engineered for long runtimes and high, sustained power output. It’s the standard choice for whole-home backup in areas prone to multi-day outages, and for commercial or industrial use.

auxiliary diesel generator for emergency power supply.

Diesel units cost the most upfront but deliver the longest lifespan and best fuel efficiency of any generator type.

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.
Lifespan: 20+ years with regular 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 $1,000 depending on coverage.

Which Generator Is Right for You?

Want the cheapest option for occasional outages? → Portable generator ($400–$2,500)
Need quiet power for a laptop, phone, or medical device? → Inverter generator ($500–$4,000)
Worried about fuel shortages during a long outage? → Dual-fuel generator ($600–$4,500)
Want zero fuel costs and no emissions? → Solar generator ($1,000–$6,000)
Want the whole house covered automatically, no matter what? → Standby generator ($8,000–$23,000)
Need heavy-duty, long-runtime power for a large property or business? → Diesel generator ($8,000–$30,000+)

Final Thoughts

A portable generator is a quick, affordable fix for occasional outages. A standby or diesel generator is a long-term investment that pays off in reliability and peace of mind, especially in areas with frequent or extended power loss.

When deciding, weigh upfront cost against installation complexity, fuel availability, and ongoing maintenance — not just the sticker price.

A well-chosen generator protects your home, keeps your family safe, and preserves your comfort during emergencies. Get matched with licensed local installers to compare real quotes before you buy.

Frequently Asked Questions About Generator Costs

How much does it cost to install a whole-house generator?

A whole-house (standby) generator typically costs $6,000 to $11,000 total, including the unit and professional installation. The generator itself usually runs $3,000 to $6,000, while setup — covering electrical wiring, plumbing, permits, and site preparation — adds another $3,000 to $5,000. Larger systems or complex installations can exceed $15,000 in total costs.

Is it cheaper to run a propane or natural gas generator?

Natural gas is usually the more affordable long-term option if you have a utility connection. Propane tends to cost more per gallon, but it’s easier to store and works well in off-grid or rural areas. Actual operating costs depend on local fuel prices, generator efficiency, and how often you use the system.

How much should I budget for generator maintenance each year?

Expect to spend $150 to $600 per year on regular generator maintenance. This includes oil changes, air and fuel filters, spark plug replacements, and professional inspections. Following the manufacturer’s service schedule helps prevent breakdowns and extends your generator’s lifespan.

What’s the most cost-effective type of generator for home use?

For short-term or occasional use, a portable or inverter generator is the most budget-friendly option, usually costing $400 to $4,000. These models are easy to move and fuel but require manual operation. For long-term convenience and reliability, a standby generator — though pricier — offers automatic backup power and can last decades with proper care.

How much does a generator cost to run per hour?

Fuel consumption depends on the generator’s size and load. On average:

Portable Gasoline Generators: $1.50 to $3.00 per hour

Propane Generators: $2.00 to $3.75 per hour

Natural Gas Generators: $0.75 to $2.00 per hour

Larger systems use more fuel but can power more appliances simultaneously. Efficient maintenance and right-sizing your generator can help reduce operating costs.

Are home generators worth the cost?

Yes — especially if you live in an area with frequent outages or rely on power for medical equipment, heating, or remote work. While the upfront investment can be high, a generator offers peace of mind, property protection, and long-term value. Many homeowners find the reliability and convenience easily justify the cost over time.

How long does a home generator last?

A well-maintained standby generator can last 15 to 30 years, depending on usage hours and service frequency. Portable and inverter generators typically last 1,000 to 5,000 hours of use. Regular maintenance, proper fuel storage, and periodic testing are key to maximizing longevity.

Do generators increase home value?

Installing a whole-home generator can increase resale value by 3% to 5%, particularly in regions prone to power outages. Buyers often view it as a premium safety and convenience feature — similar to a home security system or solar setup.

Generator Cost Guide: How Much Should You Expect to Pay?