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« Syntec Cellulosic Ethanol Sets Price Record | Main | FYI: Abengoa to Build 280MW Concentrating Solar Power Plant in Arizona »

February 21, 2008

Comments

Dale Jones, Ph.D., P.E.

The EEStor ultracapacitor battery system would work OK if you have a high voltage (3500 VDC) converter either in your garage or in the car, so you could simply plug into 120VAC and charge the EEStor. That way, using electic power from the grid at night when demand is low, we get better energy utilization, since powerplant efficiencies range from 34% to 52% and gasoline engines in cars range from 14% to 22% efficiency. Hence, better use of energy resources and reduced pollution, not to mention reduced need for foreign oil imports. Too bad there is not a solar panel system that could produce 3500VDC, but that is not likely to happen in the near future.

solarnetwork

another application for the EEStor technology...

http://www.solarnetwork.net/

Bob Wallace

I have 120vac from PV panels available in my garage.

There's no difference between my PV powered 120vac and grid supplied 120vac.

(Except my power is more reliable. The grid around here goes down for some period of time every year. My system has been down once in over 15 years. ;o)

Kit P

“Except my power is more reliable.”

Except at night, when trees have leaves, and cloudy days. Bob maybe you should look up 'reliable' in the dictionary.

Bob Wallace

Hummm.....

Wonder why my lights work at night and my radio continues to play?

Why so ever does the milk in my refrigerator not spoil?

Could it be that my battery bank stores energy for the dark hours?

Gordon

Hi Bob,
I've been thinking of a solar panel system with a battery bank and inverter for my home. How many panels do you have and how large (and type) is your battery bank?

Orion

What's going to make or break this technology is wheither it's cheaper to buy one set of EEStor modules for the life of the system or periodically replace battery packs. Until they start shipping we just won't know.

Bob Wallace

Hi Gordon,

Just saw your post.

I'm running with 1.2kW of panels (16 75 watt on two racks).

I'm using 12 6 volt golf cart batteries wired into a 24 volt configuration for storage. Storage is designed to carry me for three days with no sun. After that I go to generator. (I don't run the shop stuff on dark days as a rule.)

I've crunched the numbers over and over and feel that golf carts are the best answer at the moment. They have to be switched out more often (5-8 years) but over time they are cheaper. Especially if you accidentally fry a set. (I've seen it happen.)

For an inverter I've got a Trace/Xantex 4024 which gives me plenty of oompf to power my shop tools (table saw, planer, etc.).

Bob Wallace

Hi Gordon,

Just saw your post.

I'm running with 1.2kW of panels (16 75 watt on two racks).

I'm using 12 6 volt golf cart batteries wired into a 24 volt configuration for storage. Storage is designed to carry me for three days with no sun. After that I go to generator. (I don't run the shop stuff on dark days as a rule.)

I've crunched the numbers over and over and feel that golf carts are the best answer at the moment. They have to be switched out more often (5-8 years) but over time they are cheaper. Especially if you accidentally fry a set. (I've seen it happen.)

For an inverter I've got a Trace/Xantex 4024 which gives me plenty of oompf to power my shop tools (table saw, planer, etc.).

Master Anime

"there is not a solar panel system that could produce 3500VDC"... dc to dc converters arnt that hard to do these days... a taser dosent use 50,000 volt batterys. Converting soler to 3500 would take less technology than an old school modem.

Todd Hathaway

You could utilize a torroid and electronics to charge one set of battery banks with ultracaps being charged while the other set of batteries and ultracaps is discharging. Go to the link for more info on related projects.

Richard

Getting 3500 volts DC is no big deal. In fact your microwave uses similar voltages on the anode of the klystron tube that's in it... those tubes require upwards of 2000 watts of power at 2.5 - 3.0kv... and we all know how much microwave ovens cost. They are cheap.

Photovoltaics are a non starter.. the minimum cost per watt using solar panels, using mono crystalline modules is currently somewhere around $4.50.. that cost is coming down, some say to $1/watt but that's way too small a power dividend to make any difference when thinking of electric cars; which literally consume kilowatts of energy. (1hp = about 750watts) At best photovoltaics are 15% efficient. (NASA has better more efficient panel$$) Just look at the huge field of solar panels needed to get 128kw of energy for the ISS.

Golf Kart batteries are not the best solution for long term PV storage. True, they tend to be cheaper, but their lifespan is sometimes as short as 3 years. They are usually not deep cycle and their self discharge rates tend to be higher. Be careful, in batteries you get what you pay for. Golf Kart batteries are not designed for PV storage... they are more like automotive batteries that have high charge/discharge rates and are consumer rated in "cranking amps" rather than ampere hours(AH).

A better but more expensive solution are the deep cycle batteries made by Gould or Surrette. Properly taken care of, these batteries can last upwards of 25 years or even longer.

Richard

Somehow the above post is shown from one Todd Hathaway... it is not...it's posted by Richard. There must be a bits and bytes screw-up somewhere...

G.S. Tripp

Hey guys, don't forget about passive solar collector concentrators. They are capable of heating the focal point to nearly 6000 degrees Fahrenheit. Nuclear power plants only operate at round 500 F and the rods will melt at 2000+ F. Passive solar is the way to go especially now that sodium is being investigated for its heat retention properties. I don't know if anyone has mentioned it, but EEStor's new capacitor would be capable of nearly instant charge times so it would only be a matter of retrofitting current fuel stations to sell electricity.

T. Lake

good read. Enjoyed it.

Nigel N.

This would be an interesting development for the auto world.

cheap jordans

That stirred our hearts in youth,There little thoughts are the rustle of leaves; they have their whisper of joy in my mind,i Looking forward to hearing more from you!

auto scanner

but EEStor's new capacitor would be capable of nearly instant charge times so it would only be a matter of retrofitting current fuel stations to sell electricity.

Matt From Storage Units

It is true that EEstor's new capcitor would be capable of a near instant charge, but the problem with that is to find stations in regular areas. They would need to retrofit existing electric car outlets in addition to the one in your house. I just don't see it as being practical.
Matt From Storage Units

kvinnor

Good food for thought here. Thank you very much for the extensive explanation.

China Electronics

pharmacy benefit managers, used this logic to create its Select Home Delivery program. For employers who participate, the Select Home Delivery program automatically enrolls their employees in the home delivery prescription service unless they specifically opt out of it. According to an Express Scripts, participating companies and employees could save up to $3 million in 2009.

Filipino Car Lease Broker Los Angeles

Do most car companies make low speed and regular speed-capable vehicles? I thought most of the time they don't release them to consumers unless they're able to drive at any speed limit

parking sensors

Oh wow, that's great that they thought the technology would be commercialized and such, but is that the case, now?

Rug Cleaning Los Angeles

Is this available yet??

Furniture Stores in Los Angeles

This would still be of interest to me, even if they only have low speed electric vehicles. But making highway-ready ones would definitely be a big deal.

seo services

Thank you for the information, I will be sure to check out those links to follow up on this progress.

dentist west hollywood

They had plans to have EEStor technology commercialized but has it actually happened yet?

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