Slow-Turning 5 kW Diesel Generator - Grab a 19 gallon fuel tank you'll have electricity for 79 hours.My guess is it’s a little bit of each, but mainly #2. Or Generac doesn’t make much money off the Honeywell gensets. Generac saves money when making the Honeywell gensets by cutting costs in some areas of manufacture or marketing. Generac charges more for the Honeywell gensets to make up for the licensing cost.Building and zoning codes can vary wildly from 1 region to another. Generac's new Protector Series diesel generators raise the bar for residential and light commercial diesel generators. Generac 20,000W 120/240V Single Phase Automatic Standby Diesel Generator with Extended Steel Tank.