Re: I've already got the system beat.
No, he has no generator, he's feeding in power on one side of the duplex, and feeding it out on the other. If the feed-in tariff is higher than the nighttime ToD pricing, he makes money on every kilowatt.
Definitely fraud, which would be a good reason for him to post AC. But I'll bet it is just a "I wish I did this" rather than "I actually did this". If he actually did it, I hope he gets caught and goes to jail. Idiots like that will give utilities the excuse they're looking for to drop feed-in tariffs entirely.