[RE-wrenches] 5 battery strings

[Jerry Shafer]

Dave
 Its a good idea to think of batteries the same way you do PV Modules. Any
time you have more then two strings they get individual fuse protection,
this is also good for diagnoses purpuses too.
The current installation has no protection, safety and l would change it.
As far as operation goes it works but thats not a exceptable reason to
leave it that way is.
Jerry


On Mon, Jul 23, 2018, 6:56 AM Dave Tedeyan <dtedeyan at taitem.com> wrote:

> Since we are on the topic of bad battery practices...
>
> I may be fixing up a system that was both designed and installed very
> poorly.
> They have a 24V Outback VFXR inverter, and ten 12V AGM batteries wired into
> 5 parallel strings. I know that is a bad idea, but since they already have
> the
> equipment, are there any safety issues by re-using this equipment? It is
> for a
> grid tie battery backup system that will remain in float most of the time.
> I assume
> that the batteries will not last particularly long, but is there any harm
> in using them
> and then just getting new batteries once they fail?
>
> Stringing is shown in the attached picture.
> Cheers,
> Dave
>
>
> *--*
>
>
> *Dave Tedeyan*
> *Senior Engineer*
>
> *Taitem Engineering, PC*
> 10 Verizon Lane, Lansing, NY 14882
> Voice: (607) 930-3481 x6
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