United States Patent US 9,115,913 B1

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40,876 comments to United States Patent US 9,115,913 B1

  • Dear Dr. Rossi,

    Do you have a measurement of the output in watts for an E-Cat SKLep that includes an AC inverter? Typically an inverter would reduce the output by 15%. Should we expect 85 watts out from an E-Cat SKLep AC version?

    I have looked at the product FAQ and specifications and did not find an answer to this question.

    Wishing you continued good luck with the SKLep.

    Best Regards,

    Daniel G. Zavela

  • Andrea Rossi

    Gerard McEk:
    1. yes, obviously
    2. I want not to open the “Pandora’s Box” of what we do and do not do when we work in our laboratories
    Warm Regards,

  • Andrea Rossi

    Italo R.:
    0- we did not yet reach orders for 700000 units
    1- yes
    2- no
    3- no; as soon s we will deliver units, the reverse engineering universe will explode with a big bang, therefore we want not it to happen before we reached an industrialization and an economy scale sufficient to defend our position in the market.
    Warm Regards,

  • Andrea Rossi

    Thank you for the information,
    Warm Regards,

  • Somebody

    Hey, Andrea, there was a big power grid failure in the state of Texas a while back, and, according to an article I’m reading, there has no been enough done to combat the problem. You may want to consider advertising in Texas. Here is a link to the article, in case you are interested:


  • Italo R.

    Dear Dr. Rossi,

    To date, you should have received orders for more than 700,000 SKLeps.
    The million of pieces has not yet been reached but it is close enough, although the speed to travel the “last mile” appears to have decreased.
    What to do?

    1) – Wait for the one million pieces ordered to be reached and then start production.

    2) – Start production immediately even if you have not reached the million pieces.
    After all, more than 700 thousand pieces are already a considerable quantity.

    3) – Immediately send a dozen SKLeps to qualified people or laboratories to have them take tests to be published online immediately. The positive results would immediately lead to an immense amount of new orders.

    Kind Regards,
    Italo R.

  • Gerard McEk

    Dear Andrea,
    You said to Camilo Urbani that the Ecat SKLep performance is being replicated to a level of Sigma 5.
    Such Sigma level also requires a number of different types and methods of measurement, because also the measurement can be wrong.
    1. Did you actually perform measurements with different power meters, current meters and voltage meters and determine the output power in different ways?
    2. Example: In the demo you used the Fluke volt meter to determine the power dissipated by the 1 ohm resistor. Did you also measure the speed of heating up the oil bath and compared that when you heated that bath while putting in 100 W of heat in the bath using e.g. a 100 W heating element in that bath? Or did you perhaps used another, but different method?
    Thanks if you can answer.
    Kind regards, Gerard

  • Maico

    @Italo R.

    The tests you want to do are very simple but functional, please publish all the data 馃檪

    If the tests, as I imagine, give the desired results, I suggest you do a self-subsistent test using this type of connection:


    keeping your multifunctional digital instruments connected, we will also have the consumption and production data of electricity in this particular operating mode 馃檪

    greetings to you and best wishes to everyone for receiving their SKLeps ordered (I am among them)

    Heartfelt thanks Andrea Rossi for your and “only yours” wonderful discovery and for the tenacity to make it become the “product of the century”


  • Andrea Rossi

    About one thousand
    Warm Regards,

  • Andrea Rossi

    Warm Regards,

  • Andrea Rossi

    Svein H. Vormedal:
    hank you for your insight,
    Warm Regards,

  • Svein H Vormedal

    Dear Andrea
    There are today approx. 7 million electric vehicles in the world.
    If each of these installed 20 SKLep that would provide 48 kWh / day, they would be close to independent of other charging.
    This constitutes a very large potential market.
    For new EVs, possibly far more SKLep will be beneficial as the batteries can be greatly reduced in size.
    Regards, Svein H. Vormedal

  • CC

    Dear Dr Rossi,
    Do you think that the theoretical hypothesis you explained in your last answer to Dr Aleksei Savchenko is coherent with the paper

  • Aleksei Savchenko

    2022-01-18 13:54 Richard Wells

    Dear Richard,
    I agree with you, that E-Cat QX is the prototipe of E-Cat SKLep, operating in the same way. There was also a rod on the side of the plasma cord, possibly to create a high-frequency alternating magnetic field. This is what a controller is for. Therefore, it is possible to combine Lep’s into one system with amplification of the output power and with one controller.
    In any case, we will soon find out about it.
    In the meantime, we wish success to Andrea Rossi, whose success is not only of scientific, but to a greater extent of universal significance, breaking the inertia of our society, which now following the slogan of the Roman Empire during its decay – “Bread and Circuses.” And this is the end of human development and the beginning of degradation.
    Best regards,

  • Roberto

    Dr Rossi,
    You received so far orders for more than 600000 Units of Ecat Skleds after the publication of the video – presentation of December 9th. Curiosity: can you tell us moreless from how many clients ?
    Congratulations for the excellent video I watched the link of in E-Catworld: simple, clear, essential like a cuttlefish bone and convincing

  • Wilfried Babelotzky

    @ Ron Stringer
    Why so complicated? I would simply couple the output to the input so that the SKLep is in self-preservation when operating. I would add a small crank generator with a high gear ratio and flywheel as the starting mechanism. After cranking and accelerating the flywheel, I would briefly connect the generator to the SKLep input via a pushbutton until it started.
    Mass production of such a device could be sold to millions in Africa.

    @ Andrea
    How much energy (current, voltage, time) does the SKLep need to start?

    Kind regards

    Translated with http://www.DeepL.com/Translator (free version)

  • Steven Nicholes Karels


    I am sorry you found my suggestion boring.

  • Andrea Rossi

    Richard Wells:
    The Sigma series measures the probability that a supposition is true.
    It depends from the specific situations the concept is applied to.
    Let me make the example of the supposition that a dice is tempered:
    Sigma 0 : the number 6 wins after 1 throw: means nothing, the supposition has no ground
    Sigma 1: the 6 wins 2 straight times: still the supposition is groundless, this event is not frequent, but can happen many times
    Sigma 2: the 6 wins 3 straight times: still this can happen, although the situation can raise some eyebrow
    Sigma 3: the 6 wins 4 straight times: it is not impossible, but all the eyebrows around begin to raise, although also this is not impossible
    Sigma 4: the 6 wins 5 straight times: at this point the suspect becomes convinction: the dice probably is tempered
    Sigma 5: the 6 wins 6 straight times: at this point it is proved that the dice is tempered, beyond any reasonable doubt.
    If instead of a dice you put an extraordinary effect of some kind, to measure if it is casual ( it happens few times) or if it is a rule ( it happens always ), the mechanism of the Sigmas is the same
    Warm Regards,

  • Andrea Rossi

    Camillo Urbani:
    The SKLep is at Sigma 5
    Warm Regards,

  • Andrea Rossi

    Ron Stringer:
    1- it should be possible
    2- depends on the situation
    Warm Regards,

  • Andrea Rossi

    Espen VDP:
    Warm Regards,

  • Espen VDP

    Dr. Rossi, even if you have not achieved 1 million orders yet, after what you have said, I think you will get there.
    Are you preparing your production systems yet?
    Regards, Espen VDP

  • Ron Stringer

    Greetings, Dr. Rossi.
    Two questions.
    1) Imagine an SKLEP, with two batteries (B1 and B2). B1 powers the SKLep, B2 is charged by the SKLep. When B1 is drained, the batteries are switched. Now B2 powers the SKLep while B1 is recharged by it. This seems a reasonable arrangement. My question is, can the switching be done electronically, so that there is no discernible pause in the power produced by the SKLep?
    2) Imagine an SKLep, powered by a battery. Can this SKLep power another, or several other, SKLeps?
    I am trying to configure a portable, independent power supply that could be used like a portable generator.
    Thanks! Looking forward to delivery of my E-cats!
    Ron Stringer

  • What can you tell of the sigma, ie what level is the phenomena replicable?

  • Richard Wells

    Dear Andrea Rossi,

    On November 11, 2017 at 7:00 AM, in response to a question/comment by ‘JPR’, you replied with regard to the test of reliability of the E-Cat QX, “We reached Sigma 5.”

    But my memory is that it was not stated clearly, exactly what feature or charactoristic of the Ecat QX that was being tested.

    Can you please state what charactoristic of the Ecat QX that you were measuring to 5 sigma, and if you regard that applies to the Ecat SKLep now being pre ordered.

    With thanks and cordial greetings, Richard Wells.

  • Andrea Rossi

    1- yes
    2- yes
    Warm Regards,

  • Andrea Rossi

    Warm Regards,

  • Anonymous

    Dear dr Andrea Rossi,
    Do you tink that the Ecat SKLed can be integrated with solar panels systems ?

  • Somebody

    Are you happy with the response that you got when you announced that you would be selling the big plants? Have you sold any of the big plants, yet?

  • Andrea Rossi

    Warm Regards,

  • Roberta

    Dear Andrea,
    When you will reach 700000 units ordered will you update us ?

  • Italo R.

    @ To all readers:

    When I will receive the SKLep I ordered, I will test it with a simple but complete and effective setup.

    The generator ordered is of the type with 12 VDC input, 12 VDC output.
    It is easier to test it than the AC version.

    Powered by a power supply AC / 12 VDC, power about 10-20W or less.

    On the output DC line I will install a multifunctional digital instrument like this:

    https://www.amazon.it/KETOTEK-Amperometro-Misitore-vololtometro-multimetro/dp/B07M8T3T2C/ref=sr_1_2_sspa?crid=1M69DAO4DJB1Y&keywords=amperometro%2Bdigitale&qid=1642167395&spamperometer=Camper2%2Camper2- ZW5jcnlwdGVkUXVhbGlmaWVyPUFWTTVaSENXRVlEUlAmZW5jcnlwdGVkSWQ9QTAxODk3MzkxT1cwWkRSQUtDTExWJmVuY3J5cHRlZEFkSWQ9QTAxNTUwMzkxWUgwVFRQOFRGVE5BJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ & S = 1

    whose output will enter in to the input of the generator SKLep.
    The output of the generator will go to power a bank of five 12V-21W incandescent lamps placed in parallel with each other.
    The lamps will be like this:

    https://www.amazon.it/Original-lampada-ausiliaria-alogena-7506-02B/dp/B002QZV5V0/ref=sr_1_9?__mk_it_IT=%C3%85M%C3%85%C5%BD%C3%95%C3 % 91 & crid = DLAB8EDL16GE & keywords = lamp + halogen + 12v + 21w and qid = 1642168913 & sprefix = lamp + halogen + 12 + v + 21 + w% 2Caps% 2C105 & sr = 8-9

    and the lamps holder will be like this:

    https://www.amazon.it/sourcingmap%C2%AE-indettore-direzione-corrente-cablaggio/dp/B073GP4SB8/ref=sr_1_1?__mk_it_IT=%C3%85M%C3%85%C5%BD%C3%95 % C3% 91 & crid = 6F2K3LAQDEEF & keywords = lampholder + ba15s & qid = 1642500683 & s = automotive & sprefix = lampholder + ba15s% 2Cautomotive% 2C89 & sr = 1-1

    On this circuit, between output of SKLep and the lamps, I will install another multifunction digital instrument identical to the one mounted in the input.

    The test will start without any lamp inserted; then one lamp will be inserted at a time until all will bee inserted.

    When each lamp is inserted, all the values 鈥嬧媤ill be read: voltages, currents, powers, both in input and output of SKLep.
    This also will allow to calculate the COP values 鈥嬧媐or each step.

    Anyway it is necessary not exceed a current of 10 ampere (maximum allowed), and in that case reduce the voltage using the upper knob.

    So this type of test is performed with variable load (and not with fixed load like the one done by Prof. Levi).

    The last part of the test will be to see the energy developed over time, for example after 24 hours of continuous operation.

    Auxiliary measurements will be made: room temperature, external temperature of the generator, digital chronometer, calendar and digital clock.

    Beautiful, isn’t it? I believe it is a complete, reliable and skeptical proof test.

    Oh well, skeptics will always have to criticize and find possible tricks or measurement inaccuracies etc. etc.

    Suggestions and proposals are accepted.

    I can’t wait for Rossi to start shipping. I should be among the first to receive (I hope).

    Kind Regards,
    Italo R.

  • Andrea Rossi

    Your comment is moving. believe me, our Team is working 10 years since resolving enormous problems.
    Ten years for us passed so fast that what happened in 2011 seems to us it was last month.
    But I totally empathyze with you,
    Warm Regards,

  • Harold

    Dear Andrea,

    While waiting for more than 10 years to witness the ECATSKLep come to live, the waiting for the 1 million threshold seems peanuts.

    Well believe me it is not, I myself have high hopes for your technology, each day now feels like 10 years although common sense says otherwise.

    Checking every day for more good news and planning ahead how to integrate the ECATSKLep system into my household makes me very anxious and a bit nervous if it will work out all okay.

    Not the question if the SKLEP is applicable, but when I can apply it, gives me considerable thoughts and keep me awake sometimes.

    I need your technology and therefore I pre-ordered it! Also I did my best to reach out and making people aware of it. But now the wait is really setting in!

    And on a cold foggy day like today here in my country I realize more than ever that the Solar Panels will produce nothing or little and the Wind-turbines will not turn, but I can almost reach out and feel the soft click while switching on my ECATSKLep system!

    Dear Dr. Andrea Rossi, I know or otherwise I hope you realize that your technology is mainly for our children!

    Kind regards,

  • Andrea Rossi

    Gavino Mamia:
    You can connect more loads, up to 100 W of power.
    Warm Regards,

  • Gavino Mamia

    Doctor Rossi, forgive my ignorance
    If I connect a 20W light to a SKlep, does it automatically deliver 20W?
    What happens if I turn on another one and another for up to 100W?
    As if it were a battery? Or do I have to connect a battery to the SKLep to have this possibility?

  • Ruby

    @Steven Nicholes Karels:
    Again with these boring suggestions about what Rossi has to demonstrate and what he has not to ! He has correctly said that he has nothing more to demonstrate; further demos would only be a loss of time; the video demo he published on December 9th has generated, so far, orders for more than 600000 Ecat SKLep, a worth of US$ 150 millions. Now we must understand that he cannot lose time with further demos, what now he has to do is to focus on manufacturing and distribution of the Ecat SKLep.

  • Andrea Rossi

    Steven Nicholes Karels:
    Thank you for your opinion,
    Warm Regards,

  • Steven Nicholes Karels

    Dear Andrea Rossi,

    I know that you are done with demonstrations for the SKLep… But what I would love to see is a simple single SKLep and controller, powering a resistive load (fixed power resistor), and continually monitored by a simple DC power meter that shows voltage drop across the load resistor, the serial measurement of the amperage going through the load resistor, and the computer power and consumed energy (integrated over time). The DC power meters are around $20 USD and the power resistor is around $30 USD. It this could be set up with an online video display, supported in the air by a plastic (clear) line or lines, it would do much to add to the credibility. And let it run for months.

  • LarryG

    Fellow ECAT Enthusiasts/ Searching for a particular post

    I have been using the journal of nuclear physics blog site for following ECAT, which is essentially unsearchable.
    VERY dissapointing.

    I just discovered that the “duplicate” blog site http://www.rossilivecat.com/ has a search engine that works!

    Eg find posts by author and key words.

    You have to go to the journal site to post though.


  • Andrea Rossi

    1- No
    2- yes
    3- more than 600000
    Warm Regards,

  • Gennady

    Dear Andrea,

    Couple questions if don’t mind.

    1. In the past you mentioned that eCat will need to be recharged every 6 to 12 months. Is this the case with SKLep?
    2. If SKlep is good for 100,000 hours, how will the user know that device is deteriorating? Will A.I. component provide advanced notifications?
    3. What is the total number of orders so far?

    Kind regards,


  • Andrea Rossi

    Greg Leonard,
    Thank you for the information,
    Warm Regards,

  • Greg Leonard

    Dear AR,
    I think an excellent use for the SKLep would be an array of 10*40 to give a Level 3 EV charging point which can deliver 480V at 100A.
    $100,000 might be a bit too expensive for a home charger, but a municipal on-street charging point would make a lot of sense in European cities.
    Greg Leonard

  • Andrea Rossi

    Thank you for the update,
    Warm Regards,

  • Andrea Rossi

    Thank you for the link,
    Warm Regards,

  • Sam

    Hello DR Rossi

    This is a 1922 documentary about
    Thomas Edison.Interesting the manufacturing
    Machines they had in parts 3 and 4.



  • Andrea Rossi

    Eugenio Mieli:
    I do not have enough knwledge of the matter to follow your insight.
    Warm Regards,

  • Eugenio Mieli

    Dear Andrea Rossi,

    At the end of last November I made you the proposal, at that moment without concrete elements, to make your presentation from a single-seat drone powered by e-Cat SK-Leps for about an hour: this would have demonstrated without doubt the density of energy that your device can reach where even the most modern batteries fail. Today we have some more technical elements and we can make some concrete hypotheses. I apologize in advance for the inevitable length of this message.


    A drone, or a helicopter, accelerates the still air that is above it and brings it to speed v below it. That is, in time t:

    E = 陆 路 M路v^2 (energy transferred to the air mass M)
    P = M路v (impulse transferred downwards to the air mass M)

    Dividing everything by the time t of the thrust on the mass M we have:

    W = 陆 M/t路v^2 (motor power)
    F = M/t路v (upward thrust)

    but: M/t = r路V/t = r路S路X/t = rSv
    with: r air density, V volume of air, S surface of the blade discs, X height of the air cylinder accelerated downwards

    Substituting this value of M/t in the two previous equations:

    W = 陆 rSv^3 (motor power)
    F = rSv^2 (pushed upwards)

    Substituting the first equation in the second and multiplying by an appropriate efficiency factor h, we have:

    F = h(4rS)^(1/3)路W^(2/3)
    which is our main equation for a drone’s thrust of power W and disk surface S

    Now let’s take the example of the Jetson One single-seat drone already on the market.

    W = 88 kW (maximum motor power)
    S 鈮 3 sm (surface of the blade discs)
    r = 1.225 kg/m^3 (air density)
    h 鈮 70% (value assumed by me)

    F 鈮 3,500 N 鈮 350 kg upward thrust weight.

    The manufacturer declares an unladen vehicle weight of 86 kg (I imagine without the batteries which can weigh 100 kg to store 30 kWh of energy). It also declares a maximum passenger weight of 95 kg. Therefore, the vehicle would have a net boost of

    F (net) = 350-86-100-95 = 69 kg net thrust weight for a flight of approximately 20 minutes maximum


    The problems and potential solutions of using the SK-Lep in this configuration can already be seen:

    鈥 SK-Leps cannot be used to charge the batteries during the flight because the recharge time (about an hour) is three times the discharge time (about 20 minutes)
    鈥 therefore, the drone should be powered directly from the SK-Leps with an electronic power controller on the SK-Leps and a small battery for emergency landings
    鈥 even so, however, the weight/power ratio of the SK-Lep would be excessive: to have an 88 kW generator plus inverter suitable for the drone, the SK-Lep should weigh between 50 and 100 g maximum and not 250 g as currently

    So, if the SK-Lep could be brought to 50/100g in weight, this configuration would theoretically be possible: there would be an SK-Lep generator of about 100 kg plus a small emergency battery; at that point the power controller should dynamically insert the SK-Leps in parallel according to the power required by the four motors. Provided that the SK-Leps allow this dynamic use.

    The only questions I ask you at the end of this analysis are:

    1 do you foresee an improvement in the weight/power ratio of the SK-Leps?
    2 Can the SK-Leps be dynamically connected/disconnected on a load while remaining active and not causing overheating?

    Cordial greetings,

    Eugenio Mieli

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