Koen Vandewalle:
I never reassured anybody about the lifespan of the Ecat: on the contrary, I repeatedly said and wrote that the lifespan of ten years ( which corresponds to 87600 hours, not the hyperbolic amount of 1 million hours you wrote in your comment ) is a theoretical assumption that we are far from having actually experienced. All the persons that made a pre-order must be well aware of the fact that so far nobody is able to guarantee the lifespan of the Ecat, as well as of the fact that all the pre-orders are not binding and all the persons that made a pre-order are free to cancel their pre-orders anytime without spending a single cent.
Warm Regards,
A.R.
I suspect that an ECAT NGU delivering constant power through an ohmic resistance might last longer than one subjected to variable, capacitive, inductive, or pulsed loads. This would especially be the case when units are connected in series or parallel.
I know for a fact that my small boiler has been running for 30 years.
Now, on a completely different aspect of heating: In Flanders, where I live, it is mandatory when selling or renting a property to make the building drastically more energy-efficient within five years. Some consulting firms have apparently already calculated the total cost of all these measures. (Though I suspect they haven’t factored in the workforce and materials needed to carry out the work.)
The overall cost of energy-saving measures in this region exceeds the total amount held in all the savings accounts of everyone living here. Thus, maintaining our current indoor climate will require our entire collective savings.
In my neighborhood, many solid buildings from the 70s and 80s are already being demolished and rebuilt—this time with insulation. People are still doing this now because they typically belong to a generation that earned relatively good money during a more prosperous era for the middle class. From a purely energy perspective, the balance isn’t always positive: the embodied energy in an average house is equivalent to about 50 years of heating. (https://solar.lowtechmagazine.com). I even suspect that the construction costs of the new buildings are higher than the lifetime heating costs of the old house, even at current energy prices.
And what about buildings with significant heritage value? Are we really going to demolish and rebuild Paris, London, Berlin, and Amsterdam? Will we hang heat pumps on every façade? I believe architecture, like many other forms of art, is one of humanity’s most important achievements.
And that’s without even addressing the planned mandatory electrification of the vehicle fleet. In my opinion, Europe’s middle class will never be able to afford that.
Then we still have agriculture, industry, and distribution to tackle. If you’re looking for a comprehensive overview of these themes, I highly recommend the works of Professor Vaclav Smil.
Let’s hope that the ECAT NGU, in a certain mode, might last 1,000,000 hours—with only minor interim maintenance or full recyclability. Andrea Rossi has reassured us several times in this regard, and I believe him. I can’t fully explain why, but I think robustness and durability are very important to him.
Dear Dr. Rossi,
One very important application of ECat could be seawater desalination. The problem of clean drinking water is particularly acute in southern countries and many other countries.
Such a desalination unit for a small family can easily be supplied by an ECat with a power of 2-3 kW.
To JJ and Koen V
Ecat’s energy supply by electric current ensures pollution-free energy delivered to the individual consumer without the need for an electricity network.
Both of these conditions at a significantly lower cost than current market prices here.
If users, for the same investment, can get 1kW of electricity delivered at the same price as 1 kW of thermal energy, the choice should not be problematic.
In my heat pump, I get 3 kW of heat out of every kW of electricity it needs.
The extra heat pump investment to get the 2 extra “thermal kW” is lower than tripling my Ecat investment.
Since I also need electricity in all the months when there is no heating demand, the question of which type of Ecat I should choose can hardly be difficult.
Italo R.
Electricity is used primarily for heating, but not exclusively.
A Hot Cat, therefore exclusively for heat production, would be used for 6 months of the year (on my island only 3) and would be unused for the remaining period.
A heat pump powered by an Ecat would be used for space heating for 6 months of the year, for 12 months to heat domestic water, and for 3 months to produce fresh air.
Electricity can also be used for many other purposes; I won’t write a pointless list of appliances.
Increased electricity costs are occurring in some areas in the eastern U.S. due to a combination of growing demand, an aging power grid, and slower-than-needed expansion of energy supplies.
While the average increase nationwide is less, certain regions have seen spikes of up to 20% or more.
Reasons for recent electricity price increases
Surging demand
Data centers: The rapid expansion of artificial intelligence, cloud computing, and cryptocurrency mining has created an unprecedented demand for electricity. By 2028, data centers could consume as much as 12% of total U.S. electricity, up from 4.4% in 2023.
Electrification: An increase in electric vehicles and household technologies like heat pumps has also driven up power consumption.
Industrial rebound: The U.S. industrial sector has grown, with factories and manufacturing plants requiring more electricity.
Extreme weather: Record-breaking heat waves and other severe weather events have pushed power grids to their limit, forcing utilities to buy expensive spot-market electricity to meet peak demand.
Supply and infrastructure limitations
Aging grid: Much of the U.S. electrical grid was built decades ago and is now struggling to handle modern demand and extreme weather. Billions of dollars are being spent on upgrades, and these costs are being passed to consumers.
Slow capacity growth: The construction of new energy generation and transmission facilities has not kept pace with rising demand. This is partly due to permitting bottlenecks and the decommissioning of old fossil-fuel plants.
Policy shifts: Some recent policies, such as the 2025 “One Big Beautiful Bill Act,” have been cited as reducing incentives for clean energy development, further impacting supply.
Volatile fuel markets: Natural gas, which powers a significant portion of U.S. electricity, has seen volatile prices due to global market disruptions and liquefied natural gas (LNG) exports. This increases the cost of electricity generation.
Dr. Rossi:
Everyone is anxious to know about the results of the very important tests you said would happen in September. What can you tell us?
Regards, Ecat Enthusiast
With global tensions reaching a boiling point currently, the ECAT has such a huge potential to diffuse this situation by allowing access to reliable clean energy for all. I think you have stated previously that your global partner expects to be able to produce something like 100MW of ECAT units annually when production gets into swing.
1) Is my estimate correct?
2) Is there a plan to ramp production to the many GWs(perhaps TWs) that would be required to make a real impact on a global scale?
Selfishly, the return on investment for integrating an ECAT with our solar power system would be faster if production ramps slowly. Since I imagine the payments for exporting electricity to the grid will reduce in time with more ECATs on the grid and less demand from it. However from a more altruistic point of view this needs to be rolled out as fast as possible.
If the ECAT is intended exclusively and always for heat generation, it would be useful to compare the cost of generating the same amount of heat using an NGU electric ECAT powering a resistor versus a purely thermal Hot Cat.
Currently, only the cost of the former is known, while the cost of the latter remains unknown.
Dr. Rossi would be the best person to answer this intriguing question.
If, hypothetically, the cost of heat generated by the Hot Cat were to be lower than that generated by the NGU ECAT, it would be interesting for the Licensee to consider also launching a second line of Hot Cats for thermal-only applications, for which there would be a huge market.
Koen Vandewalle:
About the last part of your comment addressed to Hej JJ, the Ecat obviously can be used to make heat too: the Joule effect has an efficiency close to 100%, therefore there is nothing wrong making use of the Ecat for heating issues; by the way, I read in the world statistics that heating is the activity that causes the higher consume of energy compared to the other consumers,
Warm Regards,
A.R.
@Koen Vandewalle – You said it yourself, heating water is one of the most power intensive applications for electricity. Why would it be silly using a device designed to produce large amounts of electricity for a long time to do this? Seems smart to me.
@Nico Amadori – As with any voltage generator, it is trivial to increase the voltage by connecting them in series. I think the limitation is 12V for the 10W cells, so you would require an NGU of at least 16.6kW to reach 20kV. At substation level this would be very low power, but you would need an inverter of course to feed AC to the grid.
Hey JJ,
(And a heads-up for Andrea Rossi: the last part is a question for you!)
I’ve also thought about those all-in-one off-grid systems. But in my line of work, with passenger lifts, a lot of that fancy electronic stuff tends to give up the ghost after about 10 years. Then you’re stuck spending a fortune on whole new systems because the original makers stop supplying spare parts. Plus, good luck finding an installer who wants to touch “ancient junk” that’s a whole decade old! And if the software updates stop, your “smart” device basically becomes an open door for hackers. Honestly, this is turning into a bit of a headache with all gadgets nowadays.
Hence my motto: Keep It Simple, Stupid (KISS)!
But back to the numbers:
Even the electricity I use at home is at least three-quarters just for heating water – for the washing machine, dishwasher, and the waterbed. Maybe a few kWh per week for the fridge and freezer.
Everything else is just lights and computers. At 30 cents per kWh, that’s peanuts. We cook on a propane stove, which costs me about €120 a year for propane (around 40 kg in four small, portable bottles – which I reckon are about 50 years old!). So, cooking has been off-grid here for years. And in a few years, we’ll switch that all to biopropane anyway.
Besides my electric car for daily short trips, I have a diesel van that recently started running on HVO100. It’s used for long distances, and its overall CO2 footprint is barely 10% of regular diesel.
I have to admit, the payback time – in terms of money – doesn’t bother me one bit.
Alright, I’ll say it: Using a sophisticated device like the ECAT NGU just to make hot water does sound a bit… silly. It’s like heating your house with a bunch of NVIDIA GPUs! But I don’t think Andrea Rossi will hold that against me, right? Plenty of people have asked for heat-only ECATS, but apparently it’s not worth the effort because the electricity-making ECATS are so good and cheap to produce.
Can the Ecat generate also high voltages, in the order of thousands of Volts (e.g 20 thousand V) to supply electricity to intermediate distribution stations ?
Nico
Just for info. Eni in fusion
An oil and gas giant signed a $1 billion deal with Commonwealth Fusion Systems
The power purchase agreement makes Eni the second major customer for Commonwealth’s first commercial fusion power plant. https://www.technologyreview.com/2025/09/22/1123870/commonwealth-fusion-eni/
The US Patent Office and other agencies, including NASA, are now under the control of the intelligence agency. Could this move by Trump have any impact on the ECAT patent?
I’m going to set up a series connection of 20 (or 21, 22…) E-Cat NGU modules, which together will produce 240 Volts DC. I’ll use this to power a simple kitchen boiler (for example, a Daalderop Close-in 10-litre model, 2200 Watts).
I’ll connect it with flexible hoses in series with my regular heating system (on the return line). I’ll also set the circulation pump for my underfloor heating to run continuously.
This way, over an 8-month period, I should save 12,672 kWh of natural gas, which works out to about €1,140.48 per year.
The kitchen boiler should last me a lifetime running like this, and it’s already equipped with a double electrical safety cut-off. If it turns out I have an energy surplus—meaning the boiler might switch off because the circulating water gets too hot—I can divert the excess electricity to a much larger electric boiler to heat domestic hot water for the shower. I’ll install this one in series on the supply line to my gas-fired combi boiler (which is the same unit that handles my central heating). If there’s still leftover energy after that, I could potentially connect another small boiler under the kitchen cabinet, though I suspect 2000 Watts will be just right for my space heating and bathroom hot water needs.
The whole system will be controlled by a small LOGO PLC, which operates on 110-240V (DC or AC). I’ll use its inputs to monitor the thermostats of the boilers, and its outputs (each rated for 10 Amps) will handle the switching. This means I won’t need any complicated inverters.
Of course, I’ll include the necessary fuses and residual-current devices (we’ll figure out the DC compatibility for those when the time comes), all housed in a proper metal enclosure.
The peripheral components and piping will cost me around €1,000, and I’m willing to bet this setup will keep running for 20 to 30 years without needing any attention.
Additionally, I’ll need about 100–200 Watts to keep the waterbeds warm (I still need to check if that can run on DC), and another 100 Watts at 12 VDC for a medical device.
For everything else, I’ll stay on the grid—including charging the car—because all those thousands of people who bought solar panels and home batteries will be happy to sell their electricity (to me).
Right now, I only have one electric car, and it doesn’t make sense to invest heavily in charging infrastructure since I use at most 50 kWh per week.
No idea what I’ll do with all that electricity in the summer, though.
So, there’s no chance I’ll ever feed a single kWh back into the grid, and I certainly won’t be inviting any inspector over to take a look at my setup.
Michael S:
Thank you for your support.
The Hot Cat is no more produced.
The Ecat makes heat using a resistance as a load; the efficiency of conversion electricity to heat by the Joule effect is very high, theoretically close to 100%.
The other issues will be discussed when you will be contacted for the delivery,
Warm Regards,
A.R.
Martin:
Remake your updated pre-order using the form here: http://www.ecatorders.com
Send it following the instructions and put the date of your original pre-order to allow us to check it.
Warm Regards,
A.R.
1. I haven’t received a confirmation of my pre-order yet!
2. What should I do if I want to change it?
3. And will the date of my previous pre-order still apply?
Hello Andrea,
I cross fingers that go to market is finally becoming reality.
The cost of an installation to heat a house/appartment is not negligeable and close to that of a heat pump even if payback is much quicker. Personally I calcultated it would need 6 Kw to cover my needs in Belgium which is 15.000 Eur only for the ecat + connection works + inverter etc for a 250m2 house. Seasonality makes that the installation would be oversized for +-10 month out of 12.
A: Do you agree in general on the above or what is your analysis ?
B: Do you think that a “Hotcat” producing heat and not electricity could be less costly / kwh heat ? The technology matured from a Heat cat to an Electricity producing Ecat, so maybe increaed complexity is driving the price. Considering the market reality of gas and oil prices for heat production beeing about 1/3 that of electricity prices per kw heat in Europe, producing cheaper Hotcats (if possible) could be an important accelerator. Heat pumps have a hard time in many parts of Europe because of level of investment and payback of 7-10 years.
Getting market share fast is very important as heatproduction for industry and residential is one of the main drivers of global warming.
C: If yes, are you and your partner envisaging to produce also such units ?
All the best to the whole team in these critical month’s !
Federico:
One hour of training ( jogging, or swimming, or skiing, or playing tennis, depending on the location I am in ) every day, no alcohol, no smoke, measured food.
Warm Regards,
A.R.
If we have two Sklep NGU 1KW generators one giving at the output 12V, the other 120V, whether their reliability due to the amount of the control electronics components is the same. Do 12V, that is parallel conection 100W Sklep ngu units generator is more reliable
Dr Rossi
Since my order for a 1kW E Cat years ago, I have had to change my phone number and email address.
How do I update it to my present number and email, so I get my notice when it is my turn to receive a unit?
Let me rephrase my question. Is/are the E-Cat or E-cats contained in the explosion proof box used in the Latina Demonstration still operational. If they are still operating, is the voltage output still the same as that used in the Demonstration.
Claire Coyaud:
I know the movie “The Concert” of Radu Mihaileanu, and I agree with you,
Warm Regards
A.R.
Yury Evdokimov:
Thank you for your suggestion,
Warm Regards,
A.R.
Koen Vandewalle:
I never reassured anybody about the lifespan of the Ecat: on the contrary, I repeatedly said and wrote that the lifespan of ten years ( which corresponds to 87600 hours, not the hyperbolic amount of 1 million hours you wrote in your comment ) is a theoretical assumption that we are far from having actually experienced. All the persons that made a pre-order must be well aware of the fact that so far nobody is able to guarantee the lifespan of the Ecat, as well as of the fact that all the pre-orders are not binding and all the persons that made a pre-order are free to cancel their pre-orders anytime without spending a single cent.
Warm Regards,
A.R.
Bernard Moeeissey:
I suppose so,
Warm Regards,
A.R.
Andrea Rossi
Will there be a media advertizing blitz when deliveries of the ECAT begin?
Thanks
ernie
Dear Svein,
I suspect that an ECAT NGU delivering constant power through an ohmic resistance might last longer than one subjected to variable, capacitive, inductive, or pulsed loads. This would especially be the case when units are connected in series or parallel.
I know for a fact that my small boiler has been running for 30 years.
Now, on a completely different aspect of heating: In Flanders, where I live, it is mandatory when selling or renting a property to make the building drastically more energy-efficient within five years. Some consulting firms have apparently already calculated the total cost of all these measures. (Though I suspect they haven’t factored in the workforce and materials needed to carry out the work.)
The overall cost of energy-saving measures in this region exceeds the total amount held in all the savings accounts of everyone living here. Thus, maintaining our current indoor climate will require our entire collective savings.
In my neighborhood, many solid buildings from the 70s and 80s are already being demolished and rebuilt—this time with insulation. People are still doing this now because they typically belong to a generation that earned relatively good money during a more prosperous era for the middle class. From a purely energy perspective, the balance isn’t always positive: the embodied energy in an average house is equivalent to about 50 years of heating. (https://solar.lowtechmagazine.com). I even suspect that the construction costs of the new buildings are higher than the lifetime heating costs of the old house, even at current energy prices.
And what about buildings with significant heritage value? Are we really going to demolish and rebuild Paris, London, Berlin, and Amsterdam? Will we hang heat pumps on every façade? I believe architecture, like many other forms of art, is one of humanity’s most important achievements.
And that’s without even addressing the planned mandatory electrification of the vehicle fleet. In my opinion, Europe’s middle class will never be able to afford that.
Then we still have agriculture, industry, and distribution to tackle. If you’re looking for a comprehensive overview of these themes, I highly recommend the works of Professor Vaclav Smil.
Let’s hope that the ECAT NGU, in a certain mode, might last 1,000,000 hours—with only minor interim maintenance or full recyclability. Andrea Rossi has reassured us several times in this regard, and I believe him. I can’t fully explain why, but I think robustness and durability are very important to him.
Kind regards,
Koen
Dear Dr. Rossi,
One very important application of ECat could be seawater desalination. The problem of clean drinking water is particularly acute in southern countries and many other countries.
Such a desalination unit for a small family can easily be supplied by an ECat with a power of 2-3 kW.
Best wishes
in your work,
Yury Evdokimov
Dear Dr Rossi,
Do you know the movie “Le Concert” directed by Radu Mihaileanu ?
It reminds me your biography,
Claire
JJ:
No, it was a prototype to make experiments and particular measurements,
Warm Regards,
A.R.
Dear Andrea
Is this heater still in development?
https://x.com/LeonardoCorpor3/status/1781264841455378725
Best regards
JJ
To JJ and Koen V
Ecat’s energy supply by electric current ensures pollution-free energy delivered to the individual consumer without the need for an electricity network.
Both of these conditions at a significantly lower cost than current market prices here.
If users, for the same investment, can get 1kW of electricity delivered at the same price as 1 kW of thermal energy, the choice should not be problematic.
In my heat pump, I get 3 kW of heat out of every kW of electricity it needs.
The extra heat pump investment to get the 2 extra “thermal kW” is lower than tripling my Ecat investment.
Since I also need electricity in all the months when there is no heating demand, the question of which type of Ecat I should choose can hardly be difficult.
Regards Svein
Italo R.
Electricity is used primarily for heating, but not exclusively.
A Hot Cat, therefore exclusively for heat production, would be used for 6 months of the year (on my island only 3) and would be unused for the remaining period.
A heat pump powered by an Ecat would be used for space heating for 6 months of the year, for 12 months to heat domestic water, and for 3 months to produce fresh air.
Electricity can also be used for many other purposes; I won’t write a pointless list of appliances.
AlexW:
I am not able to answer so far,
Warm Regards,
A.R.
Ecat Enthusiast:
In the first week of October we will make the usual monthly report,
Warm Regards,
A.R.
axil:
Thank you for your insight,
Warm Regards,
A.R.
Increased electricity costs are occurring in some areas in the eastern U.S. due to a combination of growing demand, an aging power grid, and slower-than-needed expansion of energy supplies.
While the average increase nationwide is less, certain regions have seen spikes of up to 20% or more.
Reasons for recent electricity price increases
Surging demand
Data centers: The rapid expansion of artificial intelligence, cloud computing, and cryptocurrency mining has created an unprecedented demand for electricity. By 2028, data centers could consume as much as 12% of total U.S. electricity, up from 4.4% in 2023.
Electrification: An increase in electric vehicles and household technologies like heat pumps has also driven up power consumption.
Industrial rebound: The U.S. industrial sector has grown, with factories and manufacturing plants requiring more electricity.
Extreme weather: Record-breaking heat waves and other severe weather events have pushed power grids to their limit, forcing utilities to buy expensive spot-market electricity to meet peak demand.
Supply and infrastructure limitations
Aging grid: Much of the U.S. electrical grid was built decades ago and is now struggling to handle modern demand and extreme weather. Billions of dollars are being spent on upgrades, and these costs are being passed to consumers.
Slow capacity growth: The construction of new energy generation and transmission facilities has not kept pace with rising demand. This is partly due to permitting bottlenecks and the decommissioning of old fossil-fuel plants.
Policy shifts: Some recent policies, such as the 2025 “One Big Beautiful Bill Act,” have been cited as reducing incentives for clean energy development, further impacting supply.
Volatile fuel markets: Natural gas, which powers a significant portion of U.S. electricity, has seen volatile prices due to global market disruptions and liquefied natural gas (LNG) exports. This increases the cost of electricity generation.
Dr. Rossi:
Everyone is anxious to know about the results of the very important tests you said would happen in September. What can you tell us?
Regards, Ecat Enthusiast
Dear Andrea,
With global tensions reaching a boiling point currently, the ECAT has such a huge potential to diffuse this situation by allowing access to reliable clean energy for all. I think you have stated previously that your global partner expects to be able to produce something like 100MW of ECAT units annually when production gets into swing.
1) Is my estimate correct?
2) Is there a plan to ramp production to the many GWs(perhaps TWs) that would be required to make a real impact on a global scale?
Selfishly, the return on investment for integrating an ECAT with our solar power system would be faster if production ramps slowly. Since I imagine the payments for exporting electricity to the grid will reduce in time with more ECATs on the grid and less demand from it. However from a more altruistic point of view this needs to be rolled out as fast as possible.
Godspeed to you and your partner!
To all:
If the ECAT is intended exclusively and always for heat generation, it would be useful to compare the cost of generating the same amount of heat using an NGU electric ECAT powering a resistor versus a purely thermal Hot Cat.
Currently, only the cost of the former is known, while the cost of the latter remains unknown.
Dr. Rossi would be the best person to answer this intriguing question.
If, hypothetically, the cost of heat generated by the Hot Cat were to be lower than that generated by the NGU ECAT, it would be interesting for the Licensee to consider also launching a second line of Hot Cats for thermal-only applications, for which there would be a huge market.
Best Regards,
Italo R.
Dear Readers,
Please go to
http://www.rossilivecat.com
to find comments published in other posts of this blog,
Warm Regards,
A.R.
Koen Vandewalle:
About the last part of your comment addressed to Hej JJ, the Ecat obviously can be used to make heat too: the Joule effect has an efficiency close to 100%, therefore there is nothing wrong making use of the Ecat for heating issues; by the way, I read in the world statistics that heating is the activity that causes the higher consume of energy compared to the other consumers,
Warm Regards,
A.R.
@Koen Vandewalle – You said it yourself, heating water is one of the most power intensive applications for electricity. Why would it be silly using a device designed to produce large amounts of electricity for a long time to do this? Seems smart to me.
@Nico Amadori – As with any voltage generator, it is trivial to increase the voltage by connecting them in series. I think the limitation is 12V for the 10W cells, so you would require an NGU of at least 16.6kW to reach 20kV. At substation level this would be very low power, but you would need an inverter of course to feed AC to the grid.
Hey JJ,
(And a heads-up for Andrea Rossi: the last part is a question for you!)
I’ve also thought about those all-in-one off-grid systems. But in my line of work, with passenger lifts, a lot of that fancy electronic stuff tends to give up the ghost after about 10 years. Then you’re stuck spending a fortune on whole new systems because the original makers stop supplying spare parts. Plus, good luck finding an installer who wants to touch “ancient junk” that’s a whole decade old! And if the software updates stop, your “smart” device basically becomes an open door for hackers. Honestly, this is turning into a bit of a headache with all gadgets nowadays.
Hence my motto: Keep It Simple, Stupid (KISS)!
But back to the numbers:
Even the electricity I use at home is at least three-quarters just for heating water – for the washing machine, dishwasher, and the waterbed. Maybe a few kWh per week for the fridge and freezer.
Everything else is just lights and computers. At 30 cents per kWh, that’s peanuts. We cook on a propane stove, which costs me about €120 a year for propane (around 40 kg in four small, portable bottles – which I reckon are about 50 years old!). So, cooking has been off-grid here for years. And in a few years, we’ll switch that all to biopropane anyway.
Besides my electric car for daily short trips, I have a diesel van that recently started running on HVO100. It’s used for long distances, and its overall CO2 footprint is barely 10% of regular diesel.
I have to admit, the payback time – in terms of money – doesn’t bother me one bit.
Alright, I’ll say it: Using a sophisticated device like the ECAT NGU just to make hot water does sound a bit… silly. It’s like heating your house with a bunch of NVIDIA GPUs! But I don’t think Andrea Rossi will hold that against me, right? Plenty of people have asked for heat-only ECATS, but apparently it’s not worth the effort because the electricity-making ECATS are so good and cheap to produce.
Best regards,
Koen
Tommek:
I don’t think so, as far as I am aware of,
Warm Regards,
A.R.
JJ:
Thank you for the link,
Warm Regards,
A.R.
Nico Amadori:
Yes,
Warm Regards,
A.R.
Can the Ecat generate also high voltages, in the order of thousands of Volts (e.g 20 thousand V) to supply electricity to intermediate distribution stations ?
Nico
Dear Koen Vanderwalle
My plan is to go completely off the grid with this battery as far as electricity is concerned. Heating comes later.
It will take 4 to 5 years before I reach the break-even point.
https://tewaycell.com/collections/eu-warehouse/products/tewaycell-15kwh-all-in-one-mobile-ess-built-in-mppt-inverter?variant=42050617049145
Best regards
JJ
Dear Andrea
Just for info. Eni in fusion
An oil and gas giant signed a $1 billion deal with Commonwealth Fusion Systems
The power purchase agreement makes Eni the second major customer for Commonwealth’s first commercial fusion power plant.
https://www.technologyreview.com/2025/09/22/1123870/commonwealth-fusion-eni/
Best regards
The US Patent Office and other agencies, including NASA, are now under the control of the intelligence agency. Could this move by Trump have any impact on the ECAT patent?
Im very hopefull.
Tommek
Dear Michael S,
I’m also from Belgium, and here’s my plan:
I’m going to set up a series connection of 20 (or 21, 22…) E-Cat NGU modules, which together will produce 240 Volts DC. I’ll use this to power a simple kitchen boiler (for example, a Daalderop Close-in 10-litre model, 2200 Watts).
I’ll connect it with flexible hoses in series with my regular heating system (on the return line). I’ll also set the circulation pump for my underfloor heating to run continuously.
This way, over an 8-month period, I should save 12,672 kWh of natural gas, which works out to about €1,140.48 per year.
The kitchen boiler should last me a lifetime running like this, and it’s already equipped with a double electrical safety cut-off. If it turns out I have an energy surplus—meaning the boiler might switch off because the circulating water gets too hot—I can divert the excess electricity to a much larger electric boiler to heat domestic hot water for the shower. I’ll install this one in series on the supply line to my gas-fired combi boiler (which is the same unit that handles my central heating). If there’s still leftover energy after that, I could potentially connect another small boiler under the kitchen cabinet, though I suspect 2000 Watts will be just right for my space heating and bathroom hot water needs.
The whole system will be controlled by a small LOGO PLC, which operates on 110-240V (DC or AC). I’ll use its inputs to monitor the thermostats of the boilers, and its outputs (each rated for 10 Amps) will handle the switching. This means I won’t need any complicated inverters.
Of course, I’ll include the necessary fuses and residual-current devices (we’ll figure out the DC compatibility for those when the time comes), all housed in a proper metal enclosure.
The peripheral components and piping will cost me around €1,000, and I’m willing to bet this setup will keep running for 20 to 30 years without needing any attention.
Additionally, I’ll need about 100–200 Watts to keep the waterbeds warm (I still need to check if that can run on DC), and another 100 Watts at 12 VDC for a medical device.
For everything else, I’ll stay on the grid—including charging the car—because all those thousands of people who bought solar panels and home batteries will be happy to sell their electricity (to me).
Right now, I only have one electric car, and it doesn’t make sense to invest heavily in charging infrastructure since I use at most 50 kWh per week.
No idea what I’ll do with all that electricity in the summer, though.
So, there’s no chance I’ll ever feed a single kWh back into the grid, and I certainly won’t be inviting any inspector over to take a look at my setup.
Michael S:
Thank you for your support.
The Hot Cat is no more produced.
The Ecat makes heat using a resistance as a load; the efficiency of conversion electricity to heat by the Joule effect is very high, theoretically close to 100%.
The other issues will be discussed when you will be contacted for the delivery,
Warm Regards,
A.R.
Martin:
Remake your updated pre-order using the form here: http://www.ecatorders.com
Send it following the instructions and put the date of your original pre-order to allow us to check it.
Warm Regards,
A.R.
Frank Acland:
Still going on,
Warm Regards,
A.R.
Dear Andrea,
Are the crucial tests still going on, or have they concluded?
Thank you if you can answer, and best wishes,
Frank Acland
Dear Andrea ,
1. I haven’t received a confirmation of my pre-order yet!
2. What should I do if I want to change it?
3. And will the date of my previous pre-order still apply?
Hello Andrea,
I cross fingers that go to market is finally becoming reality.
The cost of an installation to heat a house/appartment is not negligeable and close to that of a heat pump even if payback is much quicker. Personally I calcultated it would need 6 Kw to cover my needs in Belgium which is 15.000 Eur only for the ecat + connection works + inverter etc for a 250m2 house. Seasonality makes that the installation would be oversized for +-10 month out of 12.
A: Do you agree in general on the above or what is your analysis ?
B: Do you think that a “Hotcat” producing heat and not electricity could be less costly / kwh heat ? The technology matured from a Heat cat to an Electricity producing Ecat, so maybe increaed complexity is driving the price. Considering the market reality of gas and oil prices for heat production beeing about 1/3 that of electricity prices per kw heat in Europe, producing cheaper Hotcats (if possible) could be an important accelerator. Heat pumps have a hard time in many parts of Europe because of level of investment and payback of 7-10 years.
Getting market share fast is very important as heatproduction for industry and residential is one of the main drivers of global warming.
C: If yes, are you and your partner envisaging to produce also such units ?
All the best to the whole team in these critical month’s !
Hendrik Oegema:
Just send copy of your pre-order with the updates; please find the pre-order form here: http://www.ecatorders.com
Warm Regards,
A.R.
Federico:
One hour of training ( jogging, or swimming, or skiing, or playing tennis, depending on the location I am in ) every day, no alcohol, no smoke, measured food.
Warm Regards,
A.R.
Drew Glista:
Thank you for your support,
Warm Regards,
A.R.
Kazimieras:
It is possible to put in parallel and/or in series only Ecats that have the same Voltage
Warm Regards,
A.R.
Dear Andrea,
If we have two Sklep NGU 1KW generators one giving at the output 12V, the other 120V, whether their reliability due to the amount of the control electronics components is the same. Do 12V, that is parallel conection 100W Sklep ngu units generator is more reliable
With the best wishes
Casimir
Dr. Rossi:
Thank you for the response to my rephrased question. Continued success and stay healthy.
Drew G.
Leggo con piacere nella risposta a Francesco Poscetti che la sua salute è ottima; qual è il suo “segreto” ?
Dr Rossi
Since my order for a 1kW E Cat years ago, I have had to change my phone number and email address.
How do I update it to my present number and email, so I get my notice when it is my turn to receive a unit?
Drew Glista:
Yes,
Warm Regards,
A.R.
Dr. Rossi:
Let me rephrase my question. Is/are the E-Cat or E-cats contained in the explosion proof box used in the Latina Demonstration still operational. If they are still operating, is the voltage output still the same as that used in the Demonstration.
Drew G.
Steven Nicholes Karels:
The Ecat must be mounted with its base down and its top up,
Warm Regards,
A.R.
Drew Glista:
The explosion proof box is just an armored box, it does not produce energy,
Warm Regards,
A.R.
Dr. Rossi:
Is the Explosion proof box containing the E-Cat(s) used in the Latina EV demonstration still operating and is it still producing the voltage
output used in the demonstration?
Drew G.