Methodology and data sources.
This page explains how the calculator builds ranges, what inputs drive changes, and where the data comes from.
How we estimate installed cost
The calculator produces a low, typical, and high range using generator size, fuel type, distance to the fuel source, electrical scope, and regional labor assumptions. Each input maps to a modeled cost band based on national install benchmarks.
- Equipment costs scale with generator size and fuel system.
- Labor ranges shift by region, permitting complexity, and panel work.
- Site prep and trenching add cost when distances exceed baseline.
Sources and assumptions
Estimates reflect typical installer proposals in the United States and are adjusted for regional pricing. The ranges assume a standard residential installation with permits, a transfer switch, and basic commissioning included.
- Manufacturer price lists and dealer guidance.
- Installer labor benchmarks by metro area.
- Permitting, inspection, and fuel service averages.
What can change the final quote
Final pricing depends on site conditions and the electrician’s scope. Upgrades, trenching, and load management can move costs beyond the typical range.
- Panel upgrades or smart load management.
- Long fuel line runs, gas meter changes, or propane tank placement.
- Severe weather requirements or additional inspections.
FAQ
Why do estimates differ from installer quotes?
Local labor rates, permitting fees, fuel line distance, and electrical upgrades can move final bids outside a typical range.
How often are the ranges updated?
We review ranges quarterly as equipment pricing and labor benchmarks shift across regions.