Originally Posted by
AbitNutz
There is a huge difference in units in the 22kv area. One type used a 2 cylinder air-cooled engine that runs at 3600 rpm. The other uses a 4 cylinder liquid cooled engine that runs at 1800 rpm. The life of the two eninges are vast as are the difference in price. The 4 cylinder liquid cooled 1800 rpm engine is quiet, low vibration engine based on a GM auto engine that can run almost indefinately. Both can run on propane or natural gas. The 2 cylinder 3600 rpm engine that is akin to a garden tractor motor.
If your budget allows, the liquid cooled 1800 rpm engine is a forever generator that can power your whole house including your central air.