Guardian™ Series emergency standby 25 kW, 104 A, 120-240 V power generator. Emergency standby power generator. Designed for large homes and small commercial buildings. Runs off natural gas or LP fuel source. Whisper-test sound level comparable to an idling car. Exercises at a quiet 62 dB at 23 ft. Low-speed exercise mode for quieter weekly tests. Automotive-style engine. Powerful Generac in-line 1.6 litre 4-cylinder liquid-cooled engine. Weather protected enclosure. Shelters generator from weather and reduces exterior noise. Insulation lowers sound levels by 2-3 decibels hour meter. Monitors for service and maintenance intervals. Automatic shutdown. High coolant temp, low coolant, low oil pressure and over speed. Transfer switch. Customize your system based on your actual application.