The production of a feedback current as it also appears in the Papp 
reaction says that the underlying and fundamental mechanism which 
drives the Rossi reaction is ionization.

Way back at the beginning of his development effort, Rossi said that his
reaction would produce a detectable electric potential.

At that early juncture, he discarded this curious characteristic of his
reaction as not significant because he viewed it as too feeble to be
productive.

Changes that he has recently made to his design have sufficiently 
enhanced this thermionic effect in preference to heat generation to a 
level that may now overshadow the production of heat as the primary 
energy product of his device.

Andrea Rossi
December 30th, 2012 at 3:01 PM
http://www.journal-of-nuclear-physics.com/?p=771&cpage=4#comment-514345
Dear Bernie Koppenhofer:
You are touching a very important point: during these very days, and also
during the more recent tests, we are working on this issue. I think we will
be able to produce directly e.m.f. , but much work has to be done.
Actually, we already produced direct e.m.f. with the reactors at high
temperature, and we measured it with the very precise measurement
instrumentation introduced by the third party expert, but we are not ready
for an industrial production, while we are at a high level of
industrialization for the production of heat and, at this point , also of
high temperature steam, which is the gate to the Carnot Cycle. Thank you
for your good comment.
Warm Regards,
A.R.
January 1st, 2013 at 6:50 PM
<http://www.journal-of-nuclear-physics.com/?p=771&cpage=5#comment-520563>
I received your words with great enthusiasm regarding the findings of
measuring direct EMF from your LENR devices.
1. Were you referring to converting heat to electricity, or were you able
to detect EMF coming directly from the reactor core?
  1- directly from the reactor core
2 Is the amount of EMF seen moderated or controlled by the temperatures
made by the Hot Cat?
  2- still under probe
3 Will you next try to increase the effect to be able to produce
power/energy directly without the need to convert heat to energy?
  3- yes
4 Will it ever be possible to have a “Cold Cat” make energy without heat?
  4- possibly
5 Or with less heat?
  5- I hope too
Also, on the "familiar" 1MW :
Andrea Rossi
December 31st, 2012 at 7:02 AM
Dear Scott L.:
As I said and wrote many times, the Container of the 1 MW plant is the
same tested one year ago, since to the military Customer we delivered
different ones. This one, seen also in the Swedish Television, has been
used to make tests, modifications, improvements, certification. It has been
a tremendous tool for R&D. Now it is destined to a Customer. It will be
delivered on March, after further series of modifications we have in course
now. Thanks to it now we can pass to a repetitive manufacturing line. After
a glorious first life as a prototype for R&D, it is on his way to go to
work in a centralized heating plant to supply heat: this will be his 
second life.
Warm Regards,
A.R.