Choosing the correct size Generac generator is one of the most important steps in ensuring reliable backup power. A generator that’s too small won’t cover your needs, while one that’s too large could mean unnecessary costs. Here’s how Michigan homeowners can determine the perfect fit.
Step 1: Determine Your Power Needs
Start by listing the appliances and systems you want to power during an outage. Consider:
- Essential Circuits – Lights, refrigerator, furnace, sump pump.
- Comfort Systems – Air conditioning, water heater, internet router.
- Whole-Home Coverage – Everything from HVAC to kitchen appliances.
💡 Tip: Most Michigan homeowners choose whole-home coverage to handle both winter heating and summer cooling needs.
Step 2: Calculate Your Total Wattage
Add up the running wattage of all essential devices and factor in the starting wattage for appliances with motors (like air conditioners or refrigerators). This total determines your generator’s required capacity.
Step 3: Consider Michigan’s Climate
Cold winters and hot summers mean your HVAC system will likely be one of the largest power draws. Choosing a Generac standby generator with extra capacity ensures it can handle seasonal demands.
Step 4: Understand Generac Sizing Options
Common residential standby sizes include:
- 7–10 kW – Basic essentials for smaller homes.
- 14–18 kW – Covers most appliances and comfort systems.
- 20–26 kW – Whole-home coverage for larger properties.
Step 5: Work with a Certified Michigan Generac Installer
A professional will:
- Perform a load calculation to match the right model to your needs.
- Ensure proper fuel supply sizing for natural gas or propane.
- Install an Automatic Transfer Switch for seamless operation.
Why Proper Sizing Matters
- Avoid Overloading – Protects your generator and home’s electrical system.
- Maximize Efficiency – Ensures fuel is used effectively.
- Future-Proofing – Allows for additional appliances or upgrades later.
Get the Perfect Generac for Your Home
The easiest way to choose the right size is to schedule a free in-home assessment with a certified Michigan Generac dealer. They’ll handle the calculations, recommend the best model, and ensure code-compliant installation.
Contact Michigan Generac today to get expert sizing advice and a no-obligation installation quote.