The main reason for buying a new generator is having the benefit of a manufacturer’s warranty. These warranties vary significantly in their length
and terms but they tend to be between 1 and 2 years. They can however sometimes significantly increase the overall cost.
Depending on the size and manufacturer there may be a longer wait or limited availability than if buying a used model.
So if you have the time to wait and would prefer a full manufacturer’s warranty and the security that offers,
Something else to bear in mind is the timescales involved when buying a new generator.
then a new generator could be the right choice for you.