Lets put it this way.... 25 KW = 37 HP. (26/.675) That is the maximum output of the generator. I've never seen a generator or anything else that was 100% efficient. The usual factor I was taught to apply was 85% efficiency.... So take that 37hp and divide again y .85..... and now you're up to 43.5 HP input to spin the gen at maximum output. Then factor in that the gen may possibly produce more than the rated 100 amps output depending on how well the circuit breaker actually works and also depending on how fast you actually spin the gen.... You spin it faster and it makes more voltage... thus it makes more power... and takes more power. The 2 hp per KW was always a rule of thumb, but a fairly accurate one as a bare minimum for full load operation. We often ran our 25KW Magnate MK II on our 4000 that was rated for 52 hp... and when a compressor or large electric motor was trying to start, little blue was banging for hell to keep that turd spinning...
If you're just running a welder you'll obviously get away with quite a bit less tractor... but if you're going to hook it to the house with 100 amps of resistance heat you better have lots of guts in front of it.
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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