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Posted by Arnold Walker on April 12, 2007, 2:44 pm
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> Neon John wrote:
>>
>>
>>>I'm looking for information on inverters adequate for whole home use,
>>>like with a battery storage unit. I'd like to see conversion
>>>efficiencies both ways, AC to DC, and DC to AC.
>>>
>>>I've tried searching the web, but just find advertisements mostly, and
>>>efficiencies are not mentioned usually.
>>
>>
>> I don't have any specific numbers handy but I imagine that if you
>> download the manuals for the candidate inverters, the info will be
>> there. Also might look around http://www.homepower.com magazine's web
>> site.
>>
>>
>>>Anyone know the cost/kwh for lithium ion batteries? Big'uns.
>>
>>
>> Just short of the national debt. And at the current state of the art,
>> given infinite money I'd still not want them because of the
>> fire/explosion hazard. I suggest dedicating a couple of hours and
>> work your way through this article:
>>
>> http://www.rcgroups.com/forums/showthread.php?t=209187
>>
>> IMHO, Li chemistry just isn't ready for large scale prime time.
>> Probably never will be. There's no reason to put a high energy
>> density but fragile and finicky chemistry in a stationary battery. For
>> a stationary battery one wants a large low energy density battery that
>> is as rugged as the concrete pad it sits on. Ideally it should last a
>> large part of your lifetime.
>>
>> If I wanted something better than PbA for home power use and had money
>> to burn, my choice would be SAFT wet cell NiCads. With minimal care,
>> wet NiCads are an heirloom purchase - will last your lifetime and your
>> kids'. Example: I have a 28 volt aircraft starter pack of Korean War
>> vintage.
>> It's still as good as they day it was made. Same capacity and same
>> low internal impedance. I've changed the KOH electrolyte about every
>> 10 years (CO2 from the air gradually neutralizes it) but other than
>> that, keep it either fully charged or fully discharged with a short
>> across the terminals.
>>
>> I mention SAFT because they're the only ones I have any experience
>> with. Others are probably as good.
>
> Actually, I'm trying to figure out the economics for this idea of plug-in
> hybrid cars being used to power the household in times of outage, or high
> electricity rates. People are touting the idea, but NO ONE is doing the
> math. Probably on purpose. So, it would be the car batteries I'm looking
> to price.
The only way an electric car can supply the house and itself with
electricity is
that it a beta voltaic or fuel cell.
And beta voltaic gets more power out the hydrogen(in the form of trituim
gas) with less heat than fuel cell.
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