POWER GENERATOR AND SYSTEM COMPRISING IT

The power generator (1) includes control system (2) which has a controller (5) to control each device of the generator. The control system calculates external electric energy, generated electric energy, load electric energy and hot water energy recovery quantity, based on the data output by the inverters (6a,6b). An operation display unit (28) displays the calculated data. An independent claim is also included for cogeneration system.