[RE-wrenches] Desulfator question; Battery Warranty

[Dan Fink]

Hi Larry;

I concur with your analysis. However I frequently see electric desulphators
being sold / installed / recommended as a matter of course on brand new
battery banks. I think this is what the Trojan tech rep was getting at.

-- 
Dan Fink,
Executive Director;
Otherpower
Buckville Energy Consulting
Buckville Publications LLC
NABCEP / IREC accredited Continuing Education Providers
970.672.4342 (voicemail)

On Fri, Apr 27, 2012 at 10:40 AM, Larry Crutcher, Starlight Solar Power
Systems <larry at starlightsolar.com> wrote:

> Hi Dan,
>
> When you think about it, a battery will not be under warranty and need a
> desulfator at the same time. Here's why: All battery manufacturers state
> that the warranty is void if a battery is has not been charged properly.
> Here is the Trojan pertinent warranty text: THE PROVISIONS OF THIS LIMITED
> WARRANTY SHALL NOT APPLY TO FAILURE DUE TO: .... Abuse or neglect....
> insufficient charging (undercharging or overcharging).
>
> Lead sulfate is an amorphous powder. When there is no charge current
> flowing, lead dioxide, lead and sulfuric acid react and make lead sulfate
> on the positive plate. When a battery is properly and fully charged (key
> words), including equalization charges, all of the lead sulfate is
> converted back to sulphuric acid, lead dioxide and lead.
>
> It takes many months of deficit charging for the lead sulfate to harden to
> the point that proper voltage, current and time (more key words) can not
> convert it back. This is the point in a batteries life where a desulfator
> might be of use; to break down the crystalline structure formed due to the
> neglect.  So, there is not a need for a desulfator circuit if the battery
> is healthy and being charged properly. If you do need a desulfator, it will
> always be due to causes that make the warranty void.
>
> Larry Crutcher
> Starlight Solar Power Systems
>
>
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