The vast majority of homes use 120/240-volt, single-phase electricity. Three-phase electricity is designed for commercial applications, such as restaurants and banks.
Don’t even consider a Generac Commercial generator for a whole house application.
Generac QuietSource Series
The Generac QuietSource Series includes a few three-phase generators too. Ignore them. Instead, focus your attention on the four 120/240-volt, single phase models.
These premium grade generators include two unique features, definitely worth the extra money.
1. 1800 vs. 3600 RPMs
Huh? Basically, the Generac engines on a QuietSource generator run at half the speed of other whole house generators. The reduced speed consumes less fuel, makes less noise and wears less, resulting in less maintenance and increased life span.
2. Aluminum Enclosure
Just like air conditioners, natural gas or propane powered generators are fully enclosed to protect the generator from the weather, rodents and stray baseballs.
Aluminum enclosures cost a little more, but they also outlast their steel counterparts. If you live near the coast – where salty air is notorious for corroding metal – get an aluminum enclosure.