[RE-wrenches] Magnum System - Discharged Battery Bank

Ray Walters ray at solarray.com
Fri Dec 19 11:08:29 PST 2014


When I had batteries reverse polarity they quickly turned around but 
never had their capacity after.
2nd, that is a clear indication of a DC drain that can kept draining all 
the way to zero.  The strongest batteries keep giving voltage, while 
weaker batteries give all they have and become resistors.  Its really a 
horrible situation that I have since avoided with LVDs, etc.

R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760

On 12/19/2014 7:48 AM, Corey Shalanski wrote:
> Update on my investigation:
> I visited the customer's house yesterday to set up a pulse charger. 
> Much to my surprise the three batteries that originally registered 
> negative voltage are now reading positive. Does this make sense - are 
> batteries able to shift between negative and positive voltages at such 
> a low charge level?
>
> I do not see any evidence of distorted cases.
>
>
> On Thu, Dec 18, 2014 at 7:58 AM, <jay at asis.com <mailto:jay at asis.com>> 
> wrote:
>
>
>     I second tump.
>     Most likely a bad /cell battery took out the system.
>     As these are VRLA batteries, I'm curious do,the cases look damaged
>     such as expanded or sunk in?
>
>     Jay
>     Peltz power
>
>
>
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