Thanks for the info, I will have to do some research on inverter generators.
What brand of cheap inverter generators have you had good luck with? A quick search for the stuff available from Home Depot shows a champion 6500 watt inverter generator for about $1200, and $600-$1000 for a 5-7k standard generator. How much would the engine displacement be a factor, as it seems like really the limiting factor is how much HP i can get out the engine running on charcoal.
I cleaned out the hopper today, I will try and make a post over the nozzle thread about that - and then had another good easy start-up and a hassle-free 30 minute run. Took maybe 2-3 minutes to get a good flare going, and another minute to dial in the air mix and get it running at maximum rpm.
I loaded it down with an oil heater, which pulled about 550 watts. It seemed to be running a little stronger today, and the voltage stayed between 110 and 113v. Not great, but probably acceptable. The nozzle temperature did not exceed 700F, even after half an hour of running under load, so that seems promising.
Dry charcoal is also clearly a must. I am not seeing any condensation happening anywhere in the system anymore, so the upper limit of moisture seems to be somewhere between 1.3 and 5%.
Oh yeah, one other question that I had: I noticed that the breather hose is emitting a bit of smoke once the engine warms up - would it make sense to plumb this back into the intake where the woodgas goes into the carb? That is basically what is happening on the stock configuration, right? Its getting sucked in with the incoming filtered air, and burnt up?