Bus Bars on batteries [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

<x-flowed>
>Travis, the problem I have with 2 volt cells is that you are trying to
>overcome the shortcomings of "parallelism" by introducing another weakness.
>The failure of any one 2 volt cell in such a large series installation
>renders most, if not all, of the bank, unusable.

Tom,

If you have half or a third as many cells, you have half or a third 
the probability of a premature cell failure every occuring (all else 
being equal).

>
>What I like about my system is that I can have as many series strings
>connected to my system as I want even if a battery or two should fail I
>still have most of the capacity of my system available.

But a customer can have a cell failure in one of several strings and 
never even know that it is causing losses, inequalities and other 
problems that start out subtle.

I feel very strongly about single-string is best, but we can't always 
expect customers to pay much more than they would for 
mass-distributed, smaller batteries. Therefore, setting a limit at 
(generally speaking) three strings, and using the best techniques 
that come from our collective experience, is the realistic approach.

Windy

- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com

==^================================================================
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email To: RE-wrenches-unsubscribe at topica.com
This email was sent to: michael.welch at homepower.com

T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================


</x-flowed>