There is no correct answer to this question. The size of generator set required depends on a number of individual factors. To ensure that your generator set is correctly sized you should contact your local Huihe distributor. They will make an appointment to come out (visit) and help you identify the kVA or wattage rating for all the equipment and appliances on your premises that will be powered by a generator. This will then enable them to provide you with details of the exact size and type of generator that is most suitable for your needs.