Power outages can strike at any time—whether due to storms, grid failures, or natural disasters—and having a home generator can provide vital peace of mind. But if you’re considering a backup generator to power your home during emergencies, one of the biggest questions you likely have is: How much does it cost to buy and install a generator?
The total cost depends on several factors, including the type and size of the generator, the fuel source, installation complexity, and whether it powers a few circuits or your entire home. This guide breaks down the real costs—from purchase to professional installation—so you can make an informed decision that fits your needs and budget.
Average Cost of a Home Generator (By Type)
Here’s a general overview of how much different types of home generators cost, not including installation:
| Generator Type | Power Output | Cost Range (Unit Only) | Best For |
|---|---|---|---|
| Portable Generator | 2,000 – 10,000 watts | $400 – $2,500 | Appliances & short-term outages |
| Inverter Generator | 1,500 – 7,500 watts | $500 – $3,000 | Sensitive electronics & quiet operation |
| Whole-House Standby Generator | 9,000 – 25,000+ watts | $2,500 – $10,000+ | Entire home backup |
These are base prices for the units themselves. For most homeowners, installation and accessories can double the total cost—especially with standby systems.
How Much Does Generator Installation Cost?
Installation costs vary significantly depending on the type of generator, electrical work required, permits, fuel line connections, and whether a transfer switch is included.
🔧 Portable Generator Installation (with Transfer Switch)
- Generator: $500 – $2,500
- Transfer Switch: $300 – $1,000
- Professional Installation: $500 – $1,500
- Total: $1,300 – $5,000+
This setup lets you power selected home circuits via a manual transfer switch. It’s a cost-effective solution for homes that don’t need full coverage.
🔧 Standby Generator Installation (Automatic)
- Generator: $3,000 – $10,000+
- Automatic Transfer Switch (ATS): $500 – $2,000 (usually included)
- Installation (labor, wiring, permits, fuel hookup): $3,000 – $6,000+
- Total: $6,500 – $16,000+
Standby generators require professional installation, concrete pad placement, natural gas/propane connections, and electrical permits. Costs are higher—but the system starts automatically and powers your home seamlessly.
Generator Cost by Fuel Type
Different fuel types can impact both upfront and long-term costs. Here’s how they compare:
| Fuel Type | Fuel Cost (Per Gallon/Therm) | Common Generator Types | Pros | Cons |
|---|---|---|---|---|
| Gasoline | $3 – $5 per gallon | Portable | Widely available, inexpensive units | Short shelf life, manual refueling |
| Propane | $2.50 – $4 per gallon | Portable & standby | Cleaner burning, long shelf life | Lower energy density |
| Diesel | $4 – $6 per gallon | Commercial & whole-house | High efficiency, long lifespan | Noisy, requires fuel storage |
| Natural Gas | $1 – $2 per therm | Standby only | Unlimited fuel via utility lines | Requires gas line access |
Tip: Natural gas standby generators often cost more to install initially, but offer unlimited runtime during long outages without needing fuel delivery or storage.
Other Costs to Consider
Besides the generator and installation, you should plan for a few additional expenses:
🔌 Transfer Switch
A manual transfer switch ($300–$1,000) or an automatic transfer switch ($500–$2,000) is required to safely connect your generator to your home’s circuits. Some models come bundled; others require separate purchase and installation.
🏗️ Site Preparation
- Concrete pad or gravel base: $300 – $1,000
- Trenching for fuel lines or wiring: $500 – $2,000+
📋 Permits and Inspections
Electrical and gas permits are typically required for standby generator installs. Budget an extra $200 – $800 depending on your location.
🛢️ Fuel Storage or Hookup
- Propane tank installation (100–500 gallons): $500 – $2,000+
- Natural gas hookup: $300 – $1,500
🔧 Maintenance and Service Plans
Annual maintenance costs $200–$500 depending on the generator type. This ensures reliability and keeps warranties intact.
Cost Breakdown by Generator Use Case
🔋 Budget-Friendly Emergency Power
Use Case: Powering a fridge, lights, and small appliances during short-term outages
- Portable generator: $700
- Extension cords: $100
- Total: ~$800 (no installation needed)
🏠 Partial Home Backup
Use Case: Powering select circuits like sump pump, kitchen, and furnace
- Portable generator: $1,500
- Manual transfer switch: $600
- Installation: $1,000
- Total: ~$3,100
💡 Whole-Home Standby Generator
Use Case: Seamless, full-home backup for extended outages
- Standby generator (22kW): $5,000
- ATS & fuel connection: $2,000
- Installation labor: $4,000
- Total: ~$11,000
How to Save Money on a Home Generator
✔️ Choose the Right Size
Overspending on a generator that’s too large wastes money. Use a load calculator or consult an electrician to determine the right wattage for your needs.
✔️ Consider a Manual Transfer Switch
If you’re comfortable switching circuits manually, this option saves hundreds compared to automatic transfer switches.
✔️ Look for Package Deals
Some manufacturers offer bundled generator + ATS + installation packages for lower prices.
✔️ Shop Off-Season
Generator prices often spike during hurricane and winter storm seasons. Shop during spring or early summer for better deals and faster installation availability.
Generator Costs: FAQs
Q: What’s the cheapest way to back up my home?
A portable generator paired with heavy-duty extension cords or a manual transfer switch is the most affordable way to power essential appliances during an outage.
Q: Can I install a generator myself to save money?
Only portable generators can be installed DIY. Standby systems require professional installation to comply with local codes and manufacturer warranties.
Q: Does a generator increase home value?
Yes. A whole-house standby generator can increase home resale value—especially in areas prone to power outages—by as much as 5% or more.
Q: Are financing options available?
Yes. Many generator dealers offer 0% financing or low monthly payments to help homeowners spread out the cost of purchase and installation.
Q: Is a standby generator worth the investment?
If you experience frequent or long outages—or rely on electricity for medical equipment, security, or heating—yes, the investment in a standby generator is often well worth it.
Final Thoughts: Generator Cost Depends on Your Needs
So, how much does it cost to buy and install a generator for your home? The answer ranges from under $1,000 for basic portable units to $10,000–$15,000+ for professionally installed standby systems. The right generator for you depends on how much power you need, how often you lose electricity, and how hands-free you want your system to be.
Think of a home generator as an investment—not just in convenience, but in safety, security, and peace of mind. With the right planning, you can find a solution that fits both your needs and your budget.
Need Help Choosing the Right Generator for Your Home?
Check out our expert guide: What Size Generator Do I Need for My Home? to explore sizing, fuel options, and the best backup power systems for your budget.