Abstract: A monitoring system for combined heat and power (CHP) units (1) has a main monitoring computer (2) at a remote central location connected to the CHP units (3). Data is processed and energy management information, as well as repair and maintenance procedures, can be derived by the remote and local computers (2, 3). Energy management information can also be obtained locally by means of a PC connected by a dial-up or network link (7) to a data access device (4b) of the local computer (3).