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The Real Costs and Benefits of Installing a Whole-House Generator

Discover the real costs, benefits & considerations of a whole-house generator so you can decide if it’s the right investment for your home.

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Why Homeowners Consider Whole-House Generators

A whole-house generator is more than just a convenience — for many homeowners, it’s peace of mind. Unlike portable units, these generators are permanently installed, connect directly to your home’s electrical system, and automatically kick on when the power goes out.

But they’re also a significant investment. Understanding the full picture — from costs and maintenance to long-term benefits — can help you decide if one is right for your home.

Contractor installing a standby generator

What a Whole-House Generator Can Do for You

Continuous Power Supply

  • Keeps every circuit in your home powered during an outage.
  • Prevents food spoilage, sump pump failure, and heating/cooling loss.

Automatic Operation

  • Starts within seconds of detecting an outage.
  • No need to be home or manually connect equipment.

Peace of Mind

  • Ideal for households with medical devices or work-from-home needs.
  • Provides stability during long outages from storms, wildfires, or grid failures.

Standby generator installed outside a brick home

Potential Downsides to Consider

High Initial Cost

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  • Whole-house generators can run from $7,000 to $15,000 installed, depending on size and fuel source.

Ongoing Maintenance

  • Requires annual servicing to ensure readiness.
  • Fuel supply must be maintained and occasionally replenished.

Permanent Installation

  • Fixed in place — you can’t take it with you if you move.
  • May require permits and compliance with local codes.

Comparing Costs and Benefits

Comparing Costs and Benefits - standby generators
FactorBenefitDrawback
Installation CostLong-term home value boostHigh upfront investment
OperationAutomatic, no manual setupRequires fuel and maintenance
CoveragePowers the entire homeMay be oversized for households with low needs
Lifespan15 to 30 years with proper careService costs add up over time

Who Gets the Most Value from a Whole-House Generator?

You’re more likely to benefit if you:

  • Live in an area with frequent or prolonged power outages.
  • Depend on electricity for medical devices or home office equipment.
  • Want to protect large appliances, HVAC systems, and sump pumps.
  • Plan to stay in your home long enough to see the return on investment.

Contractor installing generator

Bottom Line

A whole-house generator can be a smart, long-term investment for homeowners who value uninterrupted power and convenience. While the upfront costs are high, the payoff comes in the form of security, comfort, and protection from costly damage during outages.

If outages are rare where you live, a smaller standby or portable generator may give you the coverage you need at a fraction of the cost. But if you can’t afford to be without power — for hours or even days — a whole-house generator could be worth every penny.

Find the Right Contractor for Your generators Project

Whether you’re ready to begin your project now or need some expert advice, our network of contractors are here to help. With a few simple questions, we’ll find the best local professionals for you

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About Us

Welcome to Homeowner Resources! We are the Modernize blog. Modernize pairs more than 3 million homeowners a year with pre-vetted contractors in their area. This blog started because we believe homeowners should know everything about their homes, from how their HVAC works to which front door colors they might love. On Homeowner Resources, you can find information on every part of your home, right down to how you can negotiate with contractors to get the best price. Here's more about the blog.

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