How to Choose the Right Size Standby Generator for Your Home
A Dallas Texas Homeowner’s Guide to Sizing Whole House Generators
When the power goes out in your neighborhood, the last thing you want is uncertainty. Not about when it will return, and certainly not about whether your standby generator can handle your home’s needs. That’s where accurate sizing becomes not only smart but essential.
As a leading provider of standby generators in the Dallas area, Verdegy understands that an elegant home deserves reliable, efficient backup power. In this guide, we’ll break down how to determine the right size generator for your home—and why the right partner matters just as much as the right unit.
Why Generator Size Matters
Size isn’t just about power—it’s about efficiency, reliability, and peace of mind. A generator that’s too small risks overloading and shutting down. One that’s too large? You’re overspending on installation, maintenance, and fuel.
Think of it like choosing the right air conditioner. If it’s too weak, your space never feels right. If it’s too powerful, you’re paying for performance you don’t need. Generators follow the same logic.
The good thing about working with Verdegy is that we have installed hundreds of units and can quickly assess the best size for your house. We focus on value, power and your long term needs.
Below is a rather detailed version of sizing, but our technician can get the size that is perfect for you with a quick walk through of your house, ranch or business.
Start With the Square Footage
While square footage isn’t the only factor, it offers a good starting point:
Home Size (sq. ft.) Recommended Generator Size (kW)
Under 2,000 10–16 kW
2,000–3,000 16–20 kW
3,000–4,500 20–24 kW
4,500+ 24–30+ kW
Think of it like choosing the right air conditioner. If it’s too weak, your space never feels right. If it’s too powerful, you’re paying for performance you don’t need. Generators follow the same logic.
Consider Essential Appliances and Systems
The next step is to identify what you’d want powered during an outage. Here are a few essentials:
- Refrigerator – 700 watts
- Central AC (3-ton) – 4,000 watts (startup)
- Gas Furnace – 800 watts
- Sump Pump – 1,500 watts
- Lighting Circuits – 600–800 watts total
- Wi-Fi & Home Office – 300–500 watts
A basic essential-load setup may fall between 10kW–16kW, while a whole-home solution can reach up to 26kW or more.
Pro Tip: Don’t forget “startup watts.” Appliances like AC units require much more power for the first few seconds.
Lifestyle Factors That Influence Load
Luxury homes often include features that significantly impact load calculation:
- Heated pools or spas
- Elevator systems
- Home theaters
- Advanced automation
- Electric vehicle chargers
- Wi-Fi & Home Office – 300–500 watts
These aren’t just conveniences—they are power-hungry systems that need to be factored into
your generator’s output.
Don’t DIY the Math Use Professional
Reputable providers like Kohler offer sophisticated generator sizing tools. At Verdegy, we conduct an on-site assessment using tools and our experience to accurately determine your load requirements.
Online calculators can offer a ballpark, but a walk-through helps account for:
- Starting vs running watts
- Simultaneous use
- Home theaters
- Fuel type (natural gas vs propane)
Our licensed team works with you to match performance and budget.
Kohler Generators: Trusted Power with Quiet Performance
Kohler’s line of home standby generators offer whisper-quiet operation, industry-leading warranties, and automatic startup within 10 seconds of power loss. With models ranging from 10kW to 38kW+, there’s a unit that fits your needs without excess.
And because Verdegy is a certified dealer of both, your system is installed and serviced by factory-trained professionals—from permits to startup with someone who knows the best electric backup system for your needs.
Ready to Power Your Home With Confidence?
Your generator should reflect the performance, comfort, and security you expect from every system in your home. Choosing the right size isn’t about watts—it’s about lifestyle continuity.
Let Verdegy design the right system for you. Schedule a consultation and get peace of mind sized just right. If you live in Dallas, give us a call at 214-207-0506.
Dallas Residents Call 214-207-0506 to schedule a generator quote for your home or business.