I have used this on my camper and at work sites that don't have any electric power:
It is an 4000 watt alternator. The bracket that goes between the tractor and altenator was made by my Son and I.
The alternator was purchase at a auction for $50.
My 149 will run for 1 1/2 to 2 hours on a tank of gas. I will put the 149 and alternator on jack stands and let the rear wheels rotate some. I don't want to rick the rear end oil overheating. Not sure if it helps much.