More info here:
http://peswiki.com/index.php/Directory:Andrea_A._Rossi_Cold_Fusion_Generator
"Rossi estimates that the cost of energy made with this system will be below 1 cent/kWh, in case of electric power made by means of a Carnot cycle, and below 1 cent/4,000 M J in case of thermal power production for heating purposes. That is several times cheaper than energy from fossil fuel sources such as coal or natural gas."