How do I use the Whole Home Generator Sizing & Transfer Switch Calculator?

Enter your specific project or financial parameters into the input fields above. The engine recalculates outputs dynamically in real time and updates visual charts and summary metrics.

Can I export and share these results?

Yes, you can generate shareable state links, export clean CSV spreadsheets, or print high-resolution executive reports with a single click.

Is this calculator free to use?

Yes, all calculation engines on ToolsVault are 100% free with no account registration or paywall required.

Emergency Power & Grid Resilience

Whole Home Generator Sizer

Determine the exact standby generator capacity (14kW to 26kW) required to run central AC, well pumps, refrigeration, and medical devices during prolonged blackouts.

Critical Appliances & HVAC

Central AC Compressor Size

Water Well Pump?

Electric Water Heater?

Refrigerators & Freezers

Soft Starter Installed on AC?

Recommended Generator Rating

Recommended 22 kW Air-Cooled Standby

Running Load 11,100 Continuous Watts

Peak Surge 19,500 Motor Starting Watts

ATS Switch 200 Amp Whole-House Switch

NG Gas Fuel 210 Cu Ft / Hr at 50%

Est Turnkey Cost $11,800 Unit + ATS + Install

Want Silent, Zero-Fuel Solar Battery Backup?

Explore LiFePO4 battery storage paired with rooftop solar for indefinite power outages.

Battery Storage

Webmaster Widget 100% Free & Responsive

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