Popular 10 kw The 10 kw Permanent Magnet Alternator with a speed of 300 RPM is the fastest selling Alternator. It generates 380 volt to 415 volt and is in Three Phase Ac with 4 wire system. It has three phase wires and one neutral wire. Can be used as single phase with three tappings or  one three phase for direct grid connection. It weighs around 125 kilograms with fully aluminium body and is horizontal axis.