The GUARD EVOLUTION automatic device allows automated management of a Mains failure. When the Mains fail Guard Evolution starts the genset according to a pre-set logic, it switches from mains/genset and feeds the User system. When the Mains come back on Guard Evolution switches from genset/mains and proceeds with cooling down the genset and ultimately shutting it down. Main characteristics: clear communication via a large backlit display screen; generating set event analysis through sophisticated algorithms; complete engine and electrical parameters; possibility of integrating additional modules and programme extensions.