Most commonly used configuration, where only one single set operates as an emergency or primary power source. Such simple applications include private residences, rental services, communication towers, events … etc.

Two or more sets are synchronized and coupled to act as one power source, able to supply huge loads with a stable and reliable manner. These configurations are used in large facilities such as hotels, hospitals, banks and factories, where emergency power source is essential, regardless of the 24 hours availability of public power.