Posted by Scott on May 20, 2009, 12:49 am
On Tue, 19 May 2009 14:43:20 +0100, in alt.energy.homepower, Eeyore
>Scott wrote:
>>
>> Is 38A the most you can get in a British flat?
>A standard supply would be 60A for a flat or small house and 100A for larger @
240V of course.
That's not so bad then. In the US 60A service was once common, these days
it's only seen on older homes. 100A is the usual, while larger homes can
have 200A service. Even 300A has been done, although when I've seen this
it's been in the form of a base 200A service with a second,
separately-metered 100A connection.
>That's a limitation of lead-acid technology of course. Fast recharge technology
is gradually coming
>on line with Li-ions like those from A123 system.
Concorde has a lead-acid AGM that can take C*4, but it's an odd one, and
still nowhere near what A123 is promoting.
I'm watching and waiting. I don't have a rapid-charge application, but I
definitely have room for a lightweight engine starting battery.
>> >In practice I've never seen one although you could invent one if you were
sufficiently daft.
>>
>> Didn't have to, the Japanese did it a long time ago.
>How did they manage that ?
By putting three windings in a stator, of course! Cute little thing, puts
out just under 250W at 9,000 RPM.
It took me a few go-arounds to realize what was wrong. I feel like I should
apologize for not realizing earlier. When you mentioned 3-phase power, you
were talking about the only kind of 3-phase power system you knew about,
which is a high-current industrial power service. I like to think you would
have been more specific if you had knowledge of more diverse 3-phase power
systems, such as the 3-phase alternator in my motorcycle.
Posted by clare on May 21, 2009, 2:55 am
On Wed, 20 May 2009 00:49:12 GMT, nobody@xmission.com (Scott) wrote:
>On Tue, 19 May 2009 14:43:20 +0100, in alt.energy.homepower, Eeyore
>>Scott wrote:
>>>
>>> Is 38A the most you can get in a British flat?
>>
>>A standard supply would be 60A for a flat or small house and 100A for larger @
240V of course.
>That's not so bad then. In the US 60A service was once common, these days
>it's only seen on older homes. 100A is the usual, while larger homes can
>have 200A service. Even 300A has been done, although when I've seen this
>it's been in the form of a base 200A service with a second,
>separately-metered 100A connection.
>>That's a limitation of lead-acid technology of course. Fast recharge
technology is gradually coming
>>on line with Li-ions like those from A123 system.
>Concorde has a lead-acid AGM that can take C*4, but it's an odd one, and
>still nowhere near what A123 is promoting.
>I'm watching and waiting. I don't have a rapid-charge application, but I
>definitely have room for a lightweight engine starting battery.
>>> >In practice I've never seen one although you could invent one if you were
sufficiently daft.
>>>
>>> Didn't have to, the Japanese did it a long time ago.
>>
>>How did they manage that ?
>By putting three windings in a stator, of course! Cute little thing, puts
>out just under 250W at 9,000 RPM.
>It took me a few go-arounds to realize what was wrong. I feel like I should
>apologize for not realizing earlier. When you mentioned 3-phase power, you
>were talking about the only kind of 3-phase power system you knew about,
>which is a high-current industrial power service. I like to think you would
>have been more specific if you had knowledge of more diverse 3-phase power
>systems, such as the 3-phase alternator in my motorcycle.
My dad has wired homes with 2 full 400 amp services.
200 amp is almost standard now and 400 is getting common in some areas
- particularly if electric heat is used (not as common as it used to
be)
Posted by wmbjkREMOVE on May 17, 2009, 2:43 pm
On Sun, 17 May 2009 12:41:16 +0100, Eeyore
>A US 120V 15A socket can supply 1.8 kW.
A common 240V socket can supply... <sigh> why bother? It's all stuff
you should well know if you were debating in good faith.
> So to recharge the battery from flat would take 50/1.8
>hours = ~ 28 hours. Not very practical I think you'll agree.
Just another fractional truth from the master of such. The fact is
that a useful electric vehicle for many could be practically charged
overnight.
Wayne
Posted by vaughn on May 17, 2009, 3:10 pm
>The fact is
> that a useful electric vehicle for many could be practically charged
> overnight.
Agreed, assuming that we are only talking about power available to the
typical USA home power service. The ability of USA's grid to handle
millions of those large chargers is another matter.
Vaughn
Posted by Eeyore on May 17, 2009, 8:36 pm
vaughn wrote:
> >The fact is that a useful electric vehicle for many could be practically
> charged
> > overnight.
> Agreed, assuming that we are only talking about power available to the
> typical USA home power service. The ability of USA's grid to handle
> millions of those large chargers is another matter.
Would require a massive upgrade of generation, the grid and local wiring.
Graham
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>>
>> Is 38A the most you can get in a British flat?
>A standard supply would be 60A for a flat or small house and 100A for larger @