I'm not really sure how these work. Anyone have any input? http://www.duropower.com/ http://www.aggreko.com/equipserv/Diesel-Generators.asp etc I'm planning on using a 400w HPS.
I didnt check the diesel generators, but the 800w gasoline generator running at 50% rated output will cost about $5/day during flowering and $3.50 during veg based on the U.S. average retail gas price of $2.91/gal. I'm not sure how this compairs to electricity costs for running a 400w, but with gas as expensive as it is right now I would assume that it is way more expensive.