An energy generating system for generating thermal energy and electrical energy for a premises. The system includes an engine that drives an AC power generator to supply supplemental or standby power to the premises. The thermal energy given off by the engine is also coupled to the premises to provide heat thereto. A processor controls the various parameters of both the energy generating system and the premises to coordinate the proper heating and cooling thereof.

A short waste-heat reuse container disposed adjacent to a 40-f container that contains a radiator 23, an engine 21, and a power generator 22 disposed in a longitudinal direction of the container, the waste-heat reuse container collecting waste heat of the engine and generating steam or hot water, the waste-heat reuse container containing a muffler 2 that muffles exhaust gas of the engine, a boiler 4 that transfers heat of the exhaust gas to water and generates steam, and a heat exchanger 3 that transfers heat of cooling water heated by the engine to water and generates hot water, wherein the muffler is disposed upright opposite to the boiler in the longitudinal direction of the waste-heat reuse container, an exhaust gas inlet 2a of the muffler being disposed on an upper wall of the container.