Heavy-duty three-phase model, engine capable of combusting both petrol and liquid propane-butane and gaseous natural gas. The use of LPG/NG as fuel saves the engine and extends its service life as combustion of cleaner fuels results in less engine wear and better lubrication. Offers sufficient power input for most one-phase and three-phase machines and appliances. Maximum/operating 1P (230V) output when fuelled by petrol 4.2/4.0 kW, LPG 4.1/3.7 kW and CNG 3.6/3.2 kW. Maximum/operating 3P (400V) output when fuelled by petrol 5.3/4.8 kW, LPG 5.1/4.5 kW and CNG 4.7/4.3 kW. Synchronous generator produces AC and DC current, max. speed of the four-stroke one-cylinder engine: 4000 rpm. Acoustic pressure/output 76/108 dB(A).