This document has been updated : please check for the latest version at

Also see :
eCat Steam Quality (with index)
eCat Steam Calculator

1. Introduction

The experiment is reported at New test of the E-cat enhances proof of heat and Report and on Radio24

Some plots of the data are at

Here are a couple of summary reports (NOTE: I don't agree with everything they say!)

Horace Heffner (Vortex) (reasonably skeptical, detailed plots, highlights deficiencies in the calorimetry)

New Energy Times (Extremely skeptical, and inaccurate. In particular, Krivit quotes Lewan's initial comments, but not the power estimates from all his data.)

Reportedly, ONE eCat module was used, discharging into a drain (with only two measurements), coupled to an external heat exchanger supplied by tap water and discharged to an external drain.

It ran self-sustained for about 4 hours with an estimated output of 3.125 kW -- but the calorimetry was very poor, and fakes can not be eliminated.

It was weighed (on a bathroom scale) and showed no significant change before and after.

According to Lewan's data the cumulative electrical energy into the system was 10.1 kWh, and the cumulative energy measured out of the heat exchanger was 32.7 kWh, giving a net excess energy of 22.6 kWh.

This is shown clearly in Heffner's Graph

The heat exchanger and thermocouples were provided by Rossi, data collection was not automated, and gave inconsistent results.

The biggest calorimetric problem is that a counter-flow heat exchanger was used, and the position of the "output" thermocouple was close to the input (steam) flow, through a brass block, so the output temperature measurement may be unreliable.

Note : the elimination of chemical fakes needs to take into consideration the starting time, not just the time that it becomes self-sustaining. For instance, Rossi says that the total energy output for the whole experiment was 25.8 kWh, and 3.9 kWh was input.

The main fakes which can NOT be eliminated are those which do NOT result in a change of weight of the eCat or heat exchanger. These include Lithium Ion batteries (feasible and concealable) and Boron burned with Compressed or Liquid oxygen (not feasible, concealable).

Note: Radio24 has a video of the "unwrapping" of the eCat and Heat exchanger. The heat exchanger is a standard industrial model, so I have excluded the possibility that it contains fake material.

2. Equipment


The "fat eCat is in the background. The heat exchanger is in the right-foreground.

The Ecat with its lid removed, showing the top heat exchanger.


3. Time Log

A spreadsheet of the data :

This is more clearly shown in a graph:

The experiment can be divided into several stages:

  • 11:00 to 13:00 -- Start-Up.

    The eCat started cold and empty. The pump and the heating resistor were turned on, but nothing happens at the output. The apparent NEGATIVE energy is probably due to a callibration error between the input and output thermocouples.
  • 13:38 -- Heat Exchanger starts to operate

    Water and/or steam reaches the Heat Exchanger, so its output temperature starts to rise.
  • 13:47 to 15:56 -- Attempts to get the Reactor to self-sustain.

    The Ecat continues to warm up, and appears to be producing excess power.

    There is a burst of power at 13:49, but it is not sustained, so Rossi switches the input power on and off several times.

    At 15:30 there is another burst, which stays high.
  • 15:56 to 19:25 -- Self-Sustaining.

    Input power is turned off, and remains off for the rest of the experiment. The temperature inside the eCat is fairly stable (120 C) but the temperature at the output (and hence the measured power) fluctuates.
  • 19:25 to 19:50 -- Cool-down.

    The hydrogen in the eCat is purged, and the input flow rate is increased to cool it down. The output power peaks, and then declines rapidly.
  • 19:50 Draining (No calorimetry)

    The eCat is drained, but the amount of water and its temperature is not recorded.

The eCat contains 30 liters of 100C water, and has a total weight of 98 kg -- which might hold a significant amount of heat (thermal mass). But since no calorimetry was done on this stage it isn't included in the overall energy budget, so the total excess power is under-estimated.

The results for the eCat will therefore be presented for several modes:

  • The total experiment
  • The 100-to-100 time, from when the eCat first heated to 100C, ending when it cools down to 100C again.
  • The stable 110-to-110 time, excluding the initial warm-up and the cool-down times.

4. Comments on Behaviour


5. Possible Explanations

I'm still trying to figure out what's going on!

6. Discharge at the End

This was not documented in this experiment, but is presumably similar to the September experiment.

7. Missing measurements

As "usual" not everything was measured, and everything was not measured all the time.


d) The rate of overflow fluid flow at regular intervals. The T-junction water trap was available, but not used.

Printable HTML Version