Whole House Generator Guide 2025: Costs, Benefits & Backup Power

Whole house generators provide automatic backup power during outages, keeping your entire home powered. Understanding generator costs, sizing, and benefits helps you choose the right system for your needs.

This comprehensive guide covers whole house generators, costs, sizing, installation, and benefits. Based on data from 600+ generator installations, you'll learn how generators provide reliable backup power.

What Is a Whole House Generator?

Definition

Whole House Generator: Automatic backup generator that powers your entire home during power outages.

How It Works:

• Automatic transfer switch
• Starts automatically during outage
• Powers entire home
• Shuts off when power returns

Benefits

Backup Power:

• Power entire home
• Automatic operation
• Peace of mind
• No interruption

Generator Costs

System Costs

Small Generator (10-15 kW):

• Cost: $5,000-$8,000
• Good for: Small homes
• Capacity: 10-15 kW

Medium Generator (15-22 kW):

• Cost: $8,000-$12,000
• Good for: Most homes
• Capacity: 15-22 kW

Large Generator (22-30+ kW):

• Cost: $12,000-$18,000+
• Good for: Large homes
• Capacity: 22-30+ kW

Installation Costs

Basic Installation:

• Cost: $2,000-$4,000
• Standard installation
• Existing gas line
• No major modifications

Complex Installation:

• Cost: $4,000-$8,000+
• Gas line installation
• Electrical upgrades
• Complex routing

Generator Benefits

Backup Power

Benefits:

• Power entire home
• Automatic operation
• No interruption
• Peace of mind

Typical Backup:

• Unlimited (with fuel supply)
• Powers all essential loads
• Comfort maintained

Getting Expert Generator Recommendations

Ready to add whole house backup power?

Our team provides expert recommendations based on:

• ✅ Your power needs
• ✅ Your home size
• ✅ Your fuel type preference
• ✅ Your budget

Get your free generator consultation: Call 877-317-9079 or request online.

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Generator data based on 2025 costs and 600+ installations. Individual costs vary by system size and installation complexity.