Momentum Dynamics CEO: 25 kW Wireless Charging Will Be The Norm In 5 Years

AUG 1 2015 BY MARK KANE 43

Andrew Daga, Momentum Dynamics CEO, speaking in Korea.

Andrew Daga, Momentum Dynamics CEO, speaking in Korea.

Andrew Daga, CEO of Momentum Dynamics, sees the future of EVs in wireless charging.

At the Institute of Electrical and Electronics Engineers (IEEE)- Power Electronics Society (PELS) Conference in Daejeon, Republic of Korea, Daga said that the right solution is 25 kW wireless charging.

He believes that this will be the norm for all EVs within 5 years! And commercialization will begin next year.

“All EVs must be connected to the power grid, and according to Daga, “the impact of wireless charging is to fully automate the charging experience and relegate it to an unnoticed background function. This will make the experience of ‘fueling’ far better than pumping gasoline into a conventional gasoline vehicle.” He went on to say, “the most important benefit will be EV driving range extension. This is because automatic operation enables more frequent charging, and more frequent charging is the best way to increase driving range.”’

“Daga said the scale of this market is so large that the way people charge vehicles in the future needs to be fast and automatic, and cannot be accomplished in residential garages. “There isn’t enough power available on residential streets, and the fact is, most people do not have a garage.” Daga showed data that point to increasingly stringent anti-pollution mandates correlated to the three fastest growing automotive markets – China, North America, and Western Europe. “The concurrence of mandates and regional market growth make it clear that EV sales will increase, but we must recognize the corresponding need for rapid automatic charging with a ubiquitous network of chargers.”

Sounds great, but do we already have a worldwide standard of wireless charging? And what will be the cost of a 25 kW wireless charging system? To charge at 25 kW, besides the wireless charging device, you need to have 25 kW on-board charger instead of 3.3 or 6.6 kW, which translates to more costs.

Categories: Charging

Tags: ,

Leave a Reply

43 Comments on "Momentum Dynamics CEO: 25 kW Wireless Charging Will Be The Norm In 5 Years"

newest oldest most voted

i don’t buy this line of reasoning. first, wireless charging is not “an unnoticed background function” because you have to be mindful of where you position your vehicle. second, plugging a vehicle in just isn’t a big deal to me, so attempts to convince me that it is tend to fall flat. wireless charging only makes sense if it is somehow inherently better than corded charging, and i don’t currently see how that is.

Autonomous cars….


And that’s yet another reason why we’ll see the further fragmentation of transportation technologies. We’ve recently added PHEVs and BEVs, and with the rise of other “alternative fuels” (hate that term) like CNG and hydrogen (at least for a while), and also autonomous cars, things will get far more “interesting” and far less “simple”.

In energy and climate presentations I used to pick out high school and college aged people in the audience and tell them, with mock wonderment, about how telephones used to be attached to the house with wires, didn’t send text messages videos, didn’t take pictures, etc. We used them to talk to people really far away and we were thrilled with that capability. Same thing with cars; they will continue to get vastly better but also much more complicated until they’re not just a new flavor of old-school car but a whole new thing that happens to work like a car used to.

if wireless charging is depending on autonomous vehicles to make it a viable product, then wireless charging will not “be the norm in 5 years” as the headline of this article suggests.


I was about to say the same thing. Even though I’m typically a critic of wireless charging, it is a neat solution for autonomous cars. Otherwise with conductive charging, there needs to be robotics (and so far outside of that VW demonstration, I don’t believe this has been put into practice for cars).

Just like my wireless charging pad for my phone, eventually we’ll have more than one coil in the floor for the car to connect to.
It’ll make it fool proof.

Wireless does not have to make sense.
A lot of thing dont make sense.
buying a $100k Tesla when a $25k car will probably do just as good.
Going to the restaurant when your fridge is full.

I could go on and on but i’ll spare you.
You know convenience sells and wireless is a perfect example. Ask your wife if for $30 or $50 more a year, she would do away with the plug and keep driving electric.
Plugging in the car is nice but wireless is more convenient, not better, just more convenient.
Like it or not, wireless WILL be the norm in a few years even with the 10% efficiency loss.
Most people drive less than 50 miles a day for way under a buck, so that’s like a dime more for wireless. Ice cars waste more than that just waiting for the light to turn green, at every light!
That horse is dead, no comment, give it up….

We pay for convenience all the time. No doubt. But for those of us who already have a L2 charger in their garage I can’t see paying for a wireless solution to replace it. The level of convenience just isn’t there. It takes seconds to plug in my Leaf when I get home.
If I was buying an EV for the first time and had a choice between wireless and corded charging, then it would be a different question.

Excellent! Put a wireless charging pad in every parking space! Why not connect it to the parking meter as well? Pay a little more and you get charging as well. Also make the communication wireless so you can use the dashboard in your car to control and pay for parking and charging.

I just hope the car industry is clever enough to cooperate on a single, compatible standard instead of every car manufacturer having their own.

And then parking will cost 30 € per hour?

Parking will cost whatever people are willing to pay for it, as usual.

Forget efficiency issues for now, and the extra cost.
So within 5 years all (or even most) EV vendors will agree on a wireless standard, on placement under the vehicle (front or rear?), on size/placement of the ground plate (diff.-sized EVs will have different reqs)? Because otherwise, non-home chargers will not serve multiple types of vehicles.

Yeah, right.

My guess is that Tesla will build its own wireless charger in conjunction with any fully autonomous, street legal model.

I could easily see companies like Uber, Google, or Apple buying fleets of fully autonomous Modle IIIs.

There would no longer be any real reason to own a vehicle. No paying a driver, lower insurance since an ape isn’t driving, can run 24/7 as a network fleet that, through data already collected from Uber, using minimal vehicles would maximize coverage area and wait time.

Where homeowners can become a lardlord and rent a home for cash flow, a person can rent their autonomous EV for cash flow. Sits in the garage 90% of the time anyway!

Does cancer clusters in children around high power tension lines come to mind? It seems like we go through steps to ensure shielding of EMF. Sticking a 25kW EMF on the other side of a wall to a bedroom doesn’t seem like a good idea. Maybe I’m missing something.

High voltage power lines causing cancer is a myth. It has been thoroughly examined for many years but no evidence has been found.

If that’s fact, cool. If it’s like scientists testifying that smoking doesn’t cause cancer *shrug*. I’ll stick with the shielded wire and plug.

Is this more like some doctors spreading misinformation about cigarettes, or some crackpots thinking the moon landings were a hoax?

Sounds more like the latter.

Rich said:

“Does cancer clusters in children around high power tension lines come to mind?”

No, but the fact that the Internet is really good a spreading bad memes does.

“Maybe I’m missing something.”

As Bugs Bunny says: “Hmmm… could be!”

“the WHO concluded that current evidence does not confirm the existence of any health consequences from exposure to low level electromagnetic fields.”

I think the key here is “low level”. Do you think 25kW classifies as low?

Why would You be in car for charging?

Even with 25kWh that’s plenty of time to get charged.

Just walk a bit if nothing better is to be done. 😉

Depends on the frequency of the magnetic field. I will site the microwave oven as an example.

Andrew Daga, like most other people, says what he wishes would happen.

25kW wireless will exist, but it will not be the standard for charging in 5 years. Mennekes and J1772 will be more popular.

In some technologies “one size fits all” works great. For instance DVDs. Charging is different. Wireless will co-exist with wired charging.

I can easily believe that someday, wireless charging of EVs will become the norm, despite wasting about 10% of the electricity used for charging.

But in five years? Absurd. As wavelet pointed out, that means all EV makers would have to agree on a charging standard. There’s absolutely no sign of that happening, and it almost certainly won’t happen as long as EV makers keep putting higher capacity batteries into newer models. Every time the capacity increases, the amount of charging current needs to increase too.

With widespread inductive charging units in place in numerous locations, there will be no need to get out of your electric car to fuel up — ever again.

When you shop at Costco, you can park over one of their chargers and while inside the store your car will be charging. There will be inductive charging units at work and at your favorite restaurant, and even the golf course parking lot will have them.

No more petrol/diesel hoses. No more high pressure CNG and Hydrogen nozzles. And best of all, no more electrical cords.

Imagine — never having to get out of your car to buy energy ever again, for as long as you live.

Expense from losses is minimal. If you drive an EV 15,000 a year the electricity (at .02 cents a mile) is only $300 a year.

Believe it or not, a 10% inefficient inductive charger only costs you $30 a year more, or a total of $330 for the whole year.

It’s not worth standing out in the rain, the sleet and snow and the broiling summer sun for a whole year to save just 30 bucks.

It’s not about individual alone that 10% losses suck, but in the big picture if you have a couple of million car to charge, 10% less efficiency would be an incredible weak point.
You would need more power generation for it, probably not clean yet.
Ocean are just an amount of million drops of water, any inefficiency could be a big problem.
Just to point the case, even the actual plug in charging efficiency is mandate to improve with new power electronics and Sic.
Efficiency is a race in itself!
It’s not only about convenience, it’s about having the best available possible so everyone could envoy.
Like Priusmaniac wrote, simple mechanical connecting device could be 100% effective.
Look out for those system to emerge.

What is needed is an hypercharger connecting at 6000 volt under the car and able to give the megawatt level charge.
It is more interesting and way easier to do that with a direct dc connection trough secured contacts. No cables no emf no manipulation and done in 10 minutes.
Afterwards, you can conveniently use that same under the car contact based system to automatically charge on 220 v ac in your garage.
There is no robotics involved, just a small bumper with the giant contacts on it a foot appart and leaf spring mounted contacts under the model s with pvc brushes arround to avoid direct contact when charging. The rest is just electric check software and bluetooth communication between the car and the charger.

I am looking at getting a wireless Level 2 charger for the 2016 Volt I am planning on purchasing. I am about to turn in my 2013 leased Volt. My reticence about making the wireless charging purchase is that only my car will be able to use the level 2 system. Guests who have electric cars won’t have access. I am wondering if any wireless system offers a companion plugin option so the system isn’t so limited.

Firstly what is the weight of the receiver coil etc. on the car ?

Secondly if it achieves or exceeds level 2 this could catch on as lets face it (most of the population is lazy at plugging in).

Why 25kWh?

New cars will get 60kWh* batteries. Is it 15kWh extra a cost of charging?

* Using Tesla as basis for estimation.

It’s 25 kW, not kWh.
Your confusing energy and power and you ain’t alone.


Thought that 25kW system in one hour can only give 25kWh.

Is that not correct?

Does inductive charging protect against battery damages caused by lightnings hitting the electrical power system of a house? In Hamburg Germany the owner( Karsten Ziems) of a house charged his Tesla Roadster over night when during a thunderstorm a lightning hit his house and damaged the electrical system of the house and the battery of his Tesla Roadster. The insurance company paid for damages in his house but has refused to pay for the battery. source:

So is wireless charging better?

Voltage surge security cutters is better.

Here are more informations about the thunderbolt damage case :

The owner Karsten Ziems nickname in the forum is Katrans.
In July 2015 after 12 month of argument wiht insurance company Zürich the case is now in the courtroom, the lawyer of insurance company Zürich denies everything and Tesla owner Ziems is upset.

Worried about 10 percent inductive charging looses ? ——————————————- “The U.S. Energy Information Administration (EIA) estimates that electricity transmission and distribution losses average about 6% of the electricity that is transmitted and distributed annually in the United States.” That’s just transmission line losses…. Before that stage you have generating plant efficiency. The better two cycle natural gas/steam hybrid generating plants are only 60% efficient at turning the latent energy of natural gas into electricity. Wow… That’s another 40% in losses. Also, batteries have an internal resistance or impedance that causes additional losses. As batteries charge and/or discharge they heat up and these heat losses represent electrical energy dissipated as heat. The charge/discharge efficiency of a lithium-ion battery is about 80-90 percent, according to a paper published at Stanford University. So, there’s another 10-20 efficiency loss. Then there are losses in the electric motor itself. A decent, off the shelf electric motor like you might find in the table saw in your garage is about 85% efficient, although electric motors can be made without too much trouble and expense that are 95% efficient. Once again we have more losses …. another 5-15 percent from the electric motor itself. Why quibble over… Read more »
Humm, no offense, but no one besides me has mentioned that the current “Plugless” product, when running a 2012 VOlt, uses slightly more than double the amperage of the same car just plugged in. In other words, if the Volt were just plugged into 240, It will use slightly less than 14 amps. But through actual testing, the same volt uses 28 amps. As I’ve mentioned before, a wireless ‘plugless’ style charger just scaled up from its current usage would be 18 kw @ 168 amps, necessitating a 225 branch breaker in the home. 25 kw using the same ‘scalability’ would be 233 amps. So if even not a continuous load, it would still require a 250 amp branch circuit, which would mean only a very large home could service the thing. Its all well and good to have ‘pie in the sky’ articles, but it would be more convincing if the company had a larger scale prototype they could actually demonstrate so that people could see the operation. Now Plugless , to their credit, does make a fine 3.0 kw charging package (not 3300 watts as their advertising claims), verified by their actual testing. Now whether there will be… Read more »

@Bill, agreed that the 25kW is probably pie-in-sky, as it is also somewhat unnecessary if wireless became ubiqitous (3KW would be sufficient if the owner were charging everywhere they parked).
Regarding the THD, this is the first that I have heard about this (in your other comment) so is the distortion an immovable object, or can it be brought down through cost-effective means?

Both the 134% current THD, and low power factor (0.6) of the present Plugless unit may be improved with off the shelf harmonic neutralizers. The real world lab test of a 2012 volt showed a charging efficiency of 82%, with a charging current of 28 amps for 3.0 kw to the Car. The few hundred dollars extra is avoided on the current product since these things can usually be installed with presumably few complaints since

1). The number of total PLUGLESS units in any given neighborhood is ‘small’.

2). Other electrical loads tend to ‘hide’ the PLUGLESS’s ratty electrical draw.

Scaling this up to a larger unit would no doubt make these problems manifest.

Therefore, Plugless’ current marketing of selling the product at a reduced price (3.0 Kw) while hold out the ‘hope’ of a larger unit in the distant future seems to me to be the most practical way to get people to buy these things.

Why is everybody so excited about Costco? Wireless charging doesn’t make it much easier to install charging stations everywhere. If anything, it’ll make it harder as it will add significant cost to the charging equipment. People already complain about the cost of a level 2 EVSE, imagine what they’ll say when you add in an inductive coil and sophisticated comms equipment.

Still looking like a solution without a problem–plugging in every night is not all that demanding, plus I like the efficiency and faster charging rate of an actual cable.

Yes, everyone seems to think these things have a 10% Loss”.

A 10% loss would mean these things are 90.9% efficient and the 9.1% of the energy would end up as wasted heating.

Unfortunately, using the PLUGLESS as an example, the efficiency is 82%, not 90.9%.

82% is to me, very high efficiency for this product, and prospective customers will probably assume this is just fine, as I do, for the convenience involved. However it is almost a “22% Loss”.