Hmm, lots of other interesting details at the E-cat World link. $100 estimated for a 6 month charge of an E-cat running at 2.5 kW. A possible 2nd 1 MW reactor running in the US by November, and E-cats available for independent testing at the University of Bologna and University of Uppsala in the same timeframe.
http://www.nyteknik.se/nyheter/energi_miljo/energi/article3179019.ece
2.5kW * 24 hrs * 182.5 days = 10,950 kWh for $100, or 0.9 cents per kWh, which is pretty good. And prices should go down as the technology gets improved, manufacturing gets sorted out, and economies of scale kick in.
If it works (still an if), it would be cost-effective enough to displace all other forms of power generation for new plants, and also be cost effective to retrofit existing plants.