Home Standby Generator Estimator

Size your generator and get your budget instantly.

Our data-driven estimator helps Miami Valley homeowners make confident decisions without the wait. It analyzes your home's electrical service and backup needs (AC, essential loads) to calculate the required kW, recommend options, and provide a realistic installation cost range. Get an accurate starting point before the site visit. Ready to proceed? Our licensed electricians will verify details and prepare a detailed, tailored proposal.

Step 1 · Home Details

Tell us about your home and service size. We’ll recommend a generator brand, size the transfer switch, and estimate typical install cost for you.

Main Service Size What is the size of your home? Preferred Brand

Step 2 · Central Air Conditioner Size

Tell us the size of your central AC. You can pick the tonnage or enter the label info (Volts × Amps). If you’re not sure and leave it blank, we’ll estimate a typical AC size for a home like yours.

Central Air Unit 1

Nameplate (V×A):

Central Air Unit 2

Nameplate (V×A):

Step 3 · What do you want to power?

Whole House will size a generator to run the entire home based on a typical setup. If you have big electric appliances (electric stove, electric dryer, electric water heater, etc.) or you only want backup for certain things, you can adjust below.

Results

NEC Service Load (W)

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Largest Surge (W)

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Sized Total (W)

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Required kW (basis)

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Generator Max Amps @240V

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Recommended Range

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Estimated Total Options

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Notes & Disclaimer: This estimate is for budgeting purposes only; final generator sizing, model selection, and pricing require an on-site evaluation by a licensed electrician. Install pricing assumes nearby, accessible natural gas; trenching, meter upsizing, concrete pads, long runs, cranes, or other site-specific conditions may add cost. Gas line work is not included and must be quoted separately by a licensed plumber. Permits, inspections, and utility coordination are required and may affect both timeline and price. Generator output differs by fuel type (natural gas vs. propane), and this tool assumes natural gas by default. Load shedding may be required for large electric appliances such as electric ranges, electric dryers, electric water heaters, or EV chargers. All pricing and availability are subject to change.