Donate Bitcoin

Donate Paypal


PeakOil is You

PeakOil is You

THE Fuel Cell Thread (merged)

Discussions of conventional and alternative energy production technologies.

Re: "Ceres power" fuel cell breakthrough - real?

Unread postby Aedo » Mon 15 Aug 2005, 00:50:09

$this->bbcode_second_pass_quote('Berkeley', '[')url=http://business.timesonline.co.uk/article/0,,8209-1614067,00.html]This[/url] sounds like a big deal, if it's half for real (no platinum???). Why isn't it being noticed on the peak oil news? What's the catch?


Home Fuel Cell Technology is an updated article from your original post. This is a significant step forward in cutting household fuel use and critically it is a solution that can be implemented without radical change to current systems or waiting for the "hydrogen economy". I don't understand why it hasn't been picked up more widely but hope it will be now.


PS: there is no catch - it is just a breakthrough that isn't easy for the general public to understand
User avatar
Aedo
Peat
Peat
 
Posts: 176
Joined: Thu 23 Jun 2005, 03:00:00

Re: "Ceres power" fuel cell breakthrough - real?

Unread postby Vexed » Mon 15 Aug 2005, 01:16:26

From the Aug 14th article:
$this->bbcode_second_pass_quote('', 'T')he boiler, which should take a year to design, uses "combined heat and power" technology.


It should take a year to design. What is done now?
User avatar
Vexed
Coal
Coal
 
Posts: 434
Joined: Fri 13 Aug 2004, 03:00:00

Re: "Ceres power" fuel cell breakthrough - real?

Unread postby Aedo » Mon 15 Aug 2005, 04:12:28

$this->bbcode_second_pass_quote('Vexed', 'F')rom the Aug 14th article:
$this->bbcode_second_pass_quote('', 'T')he boiler, which should take a year to design, uses "combined heat and power" technology.


It should take a year to design. What is done now?


This brief article from Materials World mentions Ceres and what has already been accomplished. Essentially they have demonstrated cells and stacks, the core power generation section, for thousands of hours (this information plus a little more is also in the RNS announcements on their website www.cerespower.com). The next step and the 'year to design' must be incorporating the fuel cell system into a home boiler.
User avatar
Aedo
Peat
Peat
 
Posts: 176
Joined: Thu 23 Jun 2005, 03:00:00

Re: "Ceres power" fuel cell breakthrough - real?

Unread postby nth » Mon 15 Aug 2005, 11:35:57

This might be a breakthrough, but it is not available now.
It should be worthy to keep an eye out on how they progress.

If PO is what Campbell predicted, then they might be a little late, but better late than never.
User avatar
nth
Heavy Crude
Heavy Crude
 
Posts: 1978
Joined: Thu 24 Feb 2005, 04:00:00

Why fuel cell and not electric?

Unread postby gnm » Mon 15 Aug 2005, 11:42:07

I suppose we could move this but its a bit of a rant....

WHY WHY WHY WHY is all this money being dumped into (fool cell) fuel cell auto research rather than just rolling out electric cars with existing modern technology?! As far as I can see there is no advantage in a fuel cell car vs a modern electric. They are even using high power AC for drive now. And hybrids seem pointless. The complexity alone should make a buyer wary...

And now you have all these people re-engineering prius's and driving around at 35mph so they can brag how high thier mileage is.

news flash! electric car uses less gas!
link
idiots.

-G :-x :-x
gnm
 

Re: "Ceres power" fuel cell breakthrough - real?

Unread postby HaleaKalea » Mon 15 Aug 2005, 12:03:22

re ceres fuel cells.

The problem here is cost, not technology.
It seems fuelcells are by nature some sort of rocket science at least
for now.

What is the cost per kw and how many kw does it put out?

As we know, fuelcells put out DC and there has to be an inverter to get 60hz AC for conn to the household supply. All of this has been done before and marketed by other companies as a package.

It sounds good, and no doubt the future lies in this technology,
it is just not quite ready yet at human level prices.

Not to mention the rising prices and impending shortages of natural gas.

We will just have to wait a see a bit longer yet

HaleaKalea 05-08-15
User avatar
HaleaKalea
Wood
Wood
 
Posts: 4
Joined: Sun 14 Aug 2005, 03:00:00
Location: Europe, near the Alps

Re: Why fuel cell and not electric?

Unread postby The_Virginian » Mon 15 Aug 2005, 18:00:43

$this->bbcode_second_pass_quote('', 'A')nd hybrids seem pointless. The complexity alone should make a buyer wary...


It makes me wary of two propulsion systems to be bothered with!

Toe cutter would agree with you on electric cars. I am mixed, but would hope they could "make the grade" with an improved elecric grid (that is a problem with nat. gas peaking, and the burdon will be on Coal, "mine dynamics" and all etc.)

Let's say we go Nuclear like France, and use Electric cars...what would wear out (except batteries) :lol: How does an auto co. design it to fail so you buy a new one in 5-10 years?

I know electricity is NOT the most efficient "fuel" for cars BUT it is not a post peak Liquid fuel like Petroleum...so it's still AVAILABLE...but at what cost?

Nah scrap that, almost any price would be better than "the end of suberbia"? right?
[urlhttp://www.youtube.com/watchv=Ai4te4daLZs&feature=related[/url] "My soul longs for the candle and the spices. If only you would pour me a cup of wine for Havdalah...My heart yearning, I shall lift up my eyes to g-d, who provides for my needs day and night."
User avatar
The_Virginian
Heavy Crude
Heavy Crude
 
Posts: 1684
Joined: Sat 19 Jun 2004, 03:00:00
Top

Re: Why fuel cell and not electric?

Unread postby gnm » Mon 15 Aug 2005, 18:25:53

Actually light electric rail would be a better solution by far...

But you misunderstand me - I wasn't debating that there would be a problem generating all that electricity, or anything else for that matter (like continuing suburbia) - but rather only that exisiting electric tech can match presumed performance of fuel cell cars. Most fuel cell vehicle tech is now focused on "Reforming" hydrogen from nat gas or even gasoline to make a "zero" emission vehicle. But it still runs on fossil fuel.

even electric motors wear out so no problem for the auto companies there...

I am all for nuke plants. better start building em now!

-G
gnm
 

Re: Why fuel cell and not electric?

Unread postby The_Toecutter » Mon 15 Aug 2005, 21:58:25

$this->bbcode_second_pass_quote('', 'e')ven electric motors wear out so no problem for the auto companies there..


There are people who have been using the same electric motor to power their cars since the 60s. They might wear out, somewhere between 500,000 and 1 million miles! :lol:

Fuel cells are mostly a shell game to placate a public wary about continued oil reliance. The auto industry needs to make the public think a solution is in the works, so that an angry public won't demand that less profitable alternatives that are currently viable take the place of the internal combustion engine. Electric cars are perfectly viable, far cheaper per mile to run factoring battery costs, than a gas car, but their virtue of being cheap means less money flows from the consumer to the company.

electric cars, by their design, are perfect for a closed system, zero growth economy. Therefore, the 'capitalists' stay as far away from them as possible. (I put capitalists in quotes because more or less these companies are as commie as they come, raking in government handouts to line their pockets) But if we are to keep something close to our current living standard and still have some cars for the middle class in the future(They should be an option, not a necessity), the electric car will be a significant factor in allowing this. If the auto industry refuses to bring it out and is never forced into it either by angry consumers or mandate, the car may be history.

A fuel cell car in mass production would cost 5-6 times more than a typical car to produce. Toyota hopes to get the cost of a mass produced fuel cell car down to $50,000 in 2005 dollars 10 years from now. Their goal may not be met. The fuel cell stack is expensive, per kW of peak power in mass production fuel cells would go for over $500/kW. Or $20,000+ for the fuel cell stack alone to give a car 54 horsepower.

The hydrogen storage tanks are far heavier than any battery. Fuel cell cars that are compact like the Honda FCX weigh in at near 4,000 pounds. Midsize cars using fuel cells will be even heavier. Likewise, battery technology has progressed to where a pack of lithium ion batteries to give a battery electric car 200 miles range plus the electric motor will weigh less than a comparable internal combustion engine.

Some magazines claim these hydrogen fuel cell cars have 200 miles range. That's the case, with very gentle acceleration in perfect weather. Most fuel cell cars have ranges hovering around 40-60 miles, which is what an inexpensive pack of lead acid batteries can do for an EV. If you want to get more than 150 miles range in a fuel cell car, there exists considerable waste in pressurizing the hydrogen to get enough into the tankEven to pressurize the hydrogen into a fuel cell car's tank takes 20+ minutes. Fast charge stations for battery electric cars could charge your battery pack in a comparable time frame.

Well to wheels, a battery electric car is about 2-3 times more energy efficient than a comparable gas-powered car(not a hybrid), BUT a hydrogen fuel cell car well to wheels is about as efficient as a comparable gas car.

Fuel cell cars are greenwashing. A shell game. Nothing more. They exist to make the public forget about the fact that off the shelf components can now make a cost-competitive EV with an internal combustion car, if the EV were to be mass produced.
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00
Top

Re: Why fuel cell and not electric?

Unread postby mgibbons19 » Mon 15 Aug 2005, 22:45:29

Funny thing about Americans. If a cost effective, viable solution to a problem exists, they will ignore it for an enormously complex, soon(maybe never) to be developed technological solution which inevtiable brings up more problems than it solves.

Seeing as this energy crisis should present itself as a liquid-fuels-for-tranportation crisis first, we could easily deal with the initial effects with walkable neighborhoods, decent electric mass transit, decent rail, and your little electric cars.

But wait, all those technologies have been developed for 50-100 years (walkable cities for 1000yrs), all of them are understandable and servicable to the average citizen. So we can't use them.

Someone will invent a Disney monorail, a hydrogen delivery infrastructure, 50k personal vehicles, and computer controlled freeways where the vehicles all blue-tooth one another so their onboard computers can synch traffic more safely. We got nothing to worry about. THEY are working on it.

Yeah right. I'll stick to my half mile commute and my bike.
mgibbons19
Heavy Crude
Heavy Crude
 
Posts: 1105
Joined: Fri 20 Aug 2004, 03:00:00

Re: Why fuel cell and not electric?

Unread postby FoxV » Mon 15 Aug 2005, 23:14:26

$this->bbcode_second_pass_quote('The_Toecutter', 'T')herefore, the 'capitalists' stay as far away from them as possible.

this may doom north america, but in other areas where oil prices are already killing the economy, perhaps we'll see some revitalizing of Electric cars from these countries (I know Honda's sells a fully electric car in India, they tried a pilot with them in Cali and I think we all know what happened there).

The other place that may revive Electric cars is Europe and the UK where their smaller driving distances make Electrics more practicle (although an EV with 30Km range would meet 90% of my family's travel needs)

I'm not buying a new car till I can get an all electric one, but if they don't come out soon, I may find myself hitchhiking to work, because my current 17yr old car is really getting to the "rough shape" point

Anyways, here's hoping
Angry yet?
FoxV
Heavy Crude
Heavy Crude
 
Posts: 1321
Joined: Wed 02 Mar 2005, 04:00:00
Location: Canada
Top

Re: "Ceres power" fuel cell breakthrough - real?

Unread postby Aedo » Mon 15 Aug 2005, 23:19:02

$this->bbcode_second_pass_quote('HaleaKalea', 'r')e ceres fuel cells.

The problem here is cost, not technology.
It seems fuelcells are by nature some sort of rocket science at least
for now.



This is the key point to the Ceres Power technology - they have developed a cost effective fuel cell which doesn't use expensive exotic materials or high cost manufacturing techniques.

Time to market is now years rather than decades and this technology could therefore have a major impact on domestic power efficiency.
User avatar
Aedo
Peat
Peat
 
Posts: 176
Joined: Thu 23 Jun 2005, 03:00:00
Top

Re: Why fuel cell and not electric?

Unread postby The_Toecutter » Tue 16 Aug 2005, 00:46:33

Short range is no longer a problem for EVs. The batteries have evolved.


The NiMH(Nickel Metal Hydride) battery allowed for 150-200 mile cruising ranges at 60-70 mph speeds. It could also be fast charged, although cooling was an issue.

In production volume for 20,000 cars per year, ECD chairman Robert Stemple quoted the price at $150/kWh, or basically $4,500 for a 30 kWh battery pack that would give an electrric car 150+ miles range. This battery is quoted at 1,750 cycles to full discharge, or with 150 miles range, a life in excess of 250,000 miles for the battery pack(Obviously not many drive 150 miles on every trip, and shallower discharges will greatly extend the life).

The patent for the Ovonic NiMH battery was bought out by Chevron Texaco who refuses to offer it at an affordable price. This is one of the reasons hybrids have such a high price premium; the Prius has on board about 1.5 kWh of this NiMH battery, but per kWh, Chevron Texaco is charging in excess of $1,200.


Further, lithium ion batteries would go down to $200-250/kWh if they were produced in volume for tens of thousands of cars and specifically tailored to them. But the big automakers refuse to mass produce EVs, and thus the batteries remain prohibitively expensive at about $450/kWh.

A 50 kWh lithium ion battery pack for 250-300 miles range would thus go for $10k-$12.5k in mass production today, and would decrease in the future or if all automakers produced EVs. A $20-25k EV with 250+ miles range and sports car performance capable of seating 4 is not out of the question.
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00

Re: Why fuel cell and not electric?

Unread postby whiteknight » Tue 16 Aug 2005, 01:18:39

Fuel Cell vs. Battery.

First off, both are electric. A fuel cell produces electricity as well as water (and some CO2 if you use Methane, Propane or other such gases). So they both turn electric motors, they both accelerate and decelerate with the same systems, they are botrh likely the same basic weight, the H2 tank is likely to be as heavy as the batteries. So on and so forth.

Differances? Well the first one I see is recharge. Recharging a battery takes a bit of time no matter the type. Especialy if you want a good solid charge that can last a while. Filling a pressurized cylinder with gas is much quicker. So for logistics the fuel cell has a slight advantage over the electirc. Most gas stations could put a large propane like tank behind the building easily enoguh and they are already set up to dispence prodcut by the volume.

Also a well made fuel cell can handle other gases, Methane, Propane, and all those hydrocarbon gases can be processed happily by many fuel cells. There is some CO2 produced, but far less than a infernal combustion engine will pump out per mile. This gives the owner a bit more flexability in the fueling of his vehicle. If they dont have H2 he could ge tby with C2H5 or CH3 without ill effects.

Now I know H2 is mostly made from hiddeycarbons, but so is most of the electricity today. If we make a massive switch to solar then why not electrolisize (sp?) the H2 from water with those same panels? In the long run it's still six of one a half dozen of the other. The shorter "recharge" time of the feul cell as well as logistical flexability seems to sell it over batteries in my book.

Now, cry havok and let slip the flamethrowers of war!
User avatar
whiteknight
Lignite
Lignite
 
Posts: 254
Joined: Tue 09 Aug 2005, 03:00:00

Re: Why fuel cell and not electric?

Unread postby The_Virginian » Tue 16 Aug 2005, 03:22:10

$this->bbcode_second_pass_quote('', 'T')he patent for the Ovonic NiMH battery was bought out by Chevron Texaco who refuses to offer it at an affordable price. This is one of the reasons hybrids have such a high price premium; the Prius has on board about 1.5 kWh of this NiMH battery, but per kWh, Chevron Texaco is charging in excess of $1,200.


Brilliant!

When the price for Petroleum become prohibative, they are in the Battery Business...untill then, they have a built in "non-compete" clause in the system that makes them money.

They may be evil, but they are very good at what they do!
[urlhttp://www.youtube.com/watchv=Ai4te4daLZs&feature=related[/url] "My soul longs for the candle and the spices. If only you would pour me a cup of wine for Havdalah...My heart yearning, I shall lift up my eyes to g-d, who provides for my needs day and night."
User avatar
The_Virginian
Heavy Crude
Heavy Crude
 
Posts: 1684
Joined: Sat 19 Jun 2004, 03:00:00
Top

Re: Why fuel cell and not electric?

Unread postby The_Toecutter » Tue 16 Aug 2005, 04:19:52

$this->bbcode_second_pass_quote('', 'F')uel Cell vs. Battery.

First off, both are electric.


True, but for simplicities sake the topic simply refered to one as electric(battery electric) and the other as fuel cell.

$this->bbcode_second_pass_quote('', 'A') fuel cell produces electricity as well as water (and some CO2 if you use Methane, Propane or other such gases). So they both turn electric motors, they both accelerate and decelerate with the same systems, they are botrh likely the same basic weight, the H2 tank is likely to be as heavy as the batteries. So on and so forth.


Actually, fuel cells are very limited when it comes to power when compared to batteries. The fastest fuel cell car I know of was a prototype BMW that did 0-60 mph in 6 seconds.

On the otherhand, there exist *plenty* of electric cars that are not only street legal, but can pop wheelies and pull 1/4 mile passes faster than Ferraris and Dodge Vipers.

It is much, much cheaper to make an eletric car have a certain amount of horsepower than a fuel cell car. Fuel cells in mass production today would go for $500/kW of power or more(Just the fuel cells, not the rest of tyhe components for the car like motors, ect.), while I'm building a battery electric car in my garage for ~$12k in parts that will have nearly 200 horsepower and is expected out-accelerate Porsche Boxters if built properly.

Further, there is a huge weight difference between hydrogen fuel cell cars and battery electric cars.

It takes about 500 pounds of lithium ion batteries to allow a midsize car with 3,000 pounds weight 150 miles range and about 150 horsepower. The hydrogen fuel cell itself capable of offering comparable power PLUS the storage tank for comparable range will weigh nearly 1,300 pounds combined.

Using lithium ion batteries, it's now possible for an electric car to weigh less than a comparable ICE powered car using the same body and chassis. Fuel cells have a long way to go when it comes to miniturization.

$this->bbcode_second_pass_quote('', 'D')ifferances? Well the first one I see is recharge. Recharging a battery takes a bit of time no matter the type. Especialy if you want a good solid charge that can last a while.


Although vapourware without independent verification, Toshiba claims it made a battery that can be recharged in one minute.

Even without this advancement, a battery pack can still be charged in 20 minutes from empty. Thin metal film lithium batteries, NiMH batteries with proper cooling, and sealed lead acid batteries can be recharged at rates far faster than a conventional outlet would be capable of. I know drag racers who drive and race electric cars, and they dump charge empty battery packs to full in minutes by plugging into another set of batteries with stored energy as the means of 'refueling'. what is needed is infrastructure for fast charging stations, which will be far cheaper to implement than some trillion dollar hydrogen transportation and distribution scheme.

$this->bbcode_second_pass_quote('', 'F')illing a pressurized cylinder with gas is much quicker.


Not necessarily. Due to all the precautions associated with handling hydrogen, great care has to be excercized in placing it into a gas tank. The slightest static electricity discharge could be a disastor. Most hydorgen cars take about 20-30 minutes to refuel as of today, which isn't too bad. Quick charge stations can also fuel batteries almost as fast, however.

$this->bbcode_second_pass_quote('', 'S')o for logistics the fuel cell has a slight advantage over the electirc.

In one area. The fuel cell is at a great disadvantage in others compared to the battery electric, including efficiency, power, operating costs, RANGE, infrastucture costs, parts cost, the list goes on...

Battery electrics don't need twenty years to become viable. The technology off the shelf today can build an electric car. Mass production costs for battery electrics may be slightly less than today's gas cars, but operating costs would be greatly reduced for the battery electric over a gas car.

$this->bbcode_second_pass_quote('', 'M')ost gas stations could put a large propane like tank behind the building easily enoguh and they are already set up to dispence prodcut by the volume.

It would be much easier and cheaper to place in a quick charger that runs off the existing grid. No trucking necessary to transport fuel, no new pipeline schemes needed, and no storage tanks.

$this->bbcode_second_pass_quote('', 'A')lso a well made fuel cell can handle other gases, Methane, Propane, and all those hydrocarbon gases can be processed happily by many fuel cells. There is some CO2 produced, but far less than a infernal combustion engine will pump out per mile. This gives the owner a bit more flexability in the fueling of his vehicle. If they dont have H2 he could ge tby with C2H5 or CH3 without ill effects.

With this, I somewhat agree, although using natural gas or propane will be far more efficient than hydrogen. Hydrogen takes a lot of electricity to produce, transport, and store.

$this->bbcode_second_pass_quote('', 'N')ow I know H2 is mostly made from hiddeycarbons, but so is most of the electricity today.

The difference is that the amount of electricity it takes to make 1 kg of hydrogen(33 kWh per kilo of hydrogen, takes about 100 kWh of electricity to manufacture, transport, distute, store, compress, and finally run through a fuel cell before that 33 kWh found in 1 kg of hydrogen makes it to the motor), could take a battery electric car three times longer distance. Thus per mile, the battery electric will make about 1/3 the pollution from the powerplant the hydrogen car would.

In fact, a battery electric car is efficient enough to offer a significant reduction in emissions from a gas car, even with coal derived electricity, while a hydrogen car, requiring more energy consumed per mile travelled,

$this->bbcode_second_pass_quote('', 'I')f we make a massive switch to solar then why not electrolisize (sp?) the H2 from water with those same panels? In the long run it's still six of one a half dozen of the other.

With 200 million hydrogen cars, you'd need three times the solar panels to run 200 million battery electric cars. From an energy efficiency standpoint, a hydrogen fuel cell cars is nothing short of wasteful.

$this->bbcode_second_pass_quote('', 'T')he shorter "recharge" time of the feul cell as well as logistical flexability seems to sell it over batteries in my book.

Until the platinum fuel cell membrane fails after 500-1,000 hours of use. Got 10,000+ bux for a new one?

A battery electric will offer a significantly reduced cost per mile of use compared to a gas car, while a fuel cell car will end up more expensive due to the exotic components in the fuel cells.
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00
Top

Re: Why fuel cell and not electric?

Unread postby Licho » Tue 16 Aug 2005, 17:43:13

Well imagine the huge line of people all sitting 20 minutes at gas station waiting to recharge their batteries every 150-250km :-)

Chance to charge it at home is also very bleak for most people .. only very tiny % of people have own garage and even less have powerfull enough amperage to charge decent battery in less than a week :-)

The best would be to standardize it and make it as a changeable module - they would simply switch your battery for the same type but already charged - within few seconds..
User avatar
Licho
Tar Sands
Tar Sands
 
Posts: 833
Joined: Mon 31 May 2004, 03:00:00
Location: Brno, Czech rep., EU

Re: Why fuel cell and not electric?

Unread postby pilferage » Tue 16 Aug 2005, 18:16:34

They need something to sell after oil becomes prohibitively expensive. Simple as that.

P.s. Should I ride around on my bicycle and brag about getting over 1000mpg! :lol:
"Humankind cannot gain anything without first giving something in return. To obtain, something of equal value must be lost. "
User avatar
pilferage
Tar Sands
Tar Sands
 
Posts: 553
Joined: Sun 21 Nov 2004, 04:00:00
Location: ~170ft/lbs@0rpm (on my bike)

Re: Why fuel cell and not electric?

Unread postby gnm » Tue 16 Aug 2005, 18:57:22

Thats simply not true Licho, your average household in the US has 60-200 Amp mains at 240V. A battery charger run from the 120 side alone could charge the whole 3Kwh system in an hour or two... The rate of charge would depend on the battery type etc. I recently bought a couple of 212Ah @12V AGM batteries (sealed lead acid) which can take an 8x charge rate. Thats like 50Amps@ 120V. That compares favorably with Li-ion.

I agree that a removable pack would be an interesting proposition but those suckers would be HEAVY.

-G
gnm
 

Re: Why fuel cell and not electric?

Unread postby Licho » Tue 16 Aug 2005, 20:10:53

Omg 200 amps at 240V?? I have 10A (@ 220V) fuse in my flat! And it's enough for everything (lighting is seperate).. well ok, microwave + electric kettle + all my computers can cause troubles, considering I have only 2200W avail, and I'm heading for upgrade, but 200A seems extremely huge to me, do you have 5cm thick cables to handle it inside walls too? :-)
(It's really huge unless you need to heat whole house with electricity or something like that)

And is 3kWh system usefull? I mean your car has what, 50kW power? Or much more if it's SUV? You can assume that reasonably powerfull car (can run uphill with cargo) needs some 20-30kW ...
And with 3kWh battery thats about 6 minutes of power :-)

I believe that you can charge 3kWh battery in hour or two, I calculated with some 10-20 amps as maximum current you can drawn from your grid. But decent cars will need to have much more powerfull batteries..

And yes, heavy too, no way people could change it with bare hands :-)
User avatar
Licho
Tar Sands
Tar Sands
 
Posts: 833
Joined: Mon 31 May 2004, 03:00:00
Location: Brno, Czech rep., EU

PreviousNext

Return to Energy Technology

Who is online

Users browsing this forum: No registered users and 1 guest