I've had success with EDTA and sulfated battery banks. In more than
one case, EDTA created a major change in the way the batteries
accepted charge. Previous to use, battery voltage would go high
immediately. After treatment, voltage would increase slowly.
This method has proven good for getting a dying bank through a
winter. It hasn't turned worn out batteries into a new bank.
At 05:16 PM 5/28/2012, you wrote:
Content-Type: multipart/alternative;
boundary="----=_NextPart_000_0038_01CD3CED.3BA35CD0"
Content-Language: en-us
If this is a fancy name for EDTA, perhaps 10 years ago I went
through virtually all of the previous 15 years of Chemical Abstracts
to see if there were ANY reference to its working. And while there
were hundreds of scholarly abstracts on lead acid chemistry, there
was only 1 that mentioned EDTA and that was a mixed review and
attributed any benefit to the ion with which EDTA was combined as a
salt. Like desulfators, there may be anecdotal hearsay, but little science.
Bill Dorsett
Sunwrights
Manhattan, KS
From: [email protected]
[mailto:[email protected]] On Behalf Of Jonathan Hill
Sent: Monday, May 28, 2012 12:33 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] De-Sulphators. The last word?
Try Thermoil deslphator additive. Has good reviews. We are selling it.
Jon Hill
Sierra Solar Systems
On May 28, 2012, at 7:17 PM, "Larry Crutcher, Starlight Solar Power
Systems"<<mailto:[email protected]>[email protected]> wrote:
Dan,
I'm perplexed. Where was anything mentioned about de-sulphators?
Where was anyone "slammed"? What in the world are you talking about?
Perhaps you meant to reply to someone else's thread. BTW, I do not
recommend a desulfator or pulser be installed on batteries.
I'll reiterate my points:
1. KC-120's from a certain production era fail and can be warranted.
2. Applying enough load will cause full current to flow from a PV array.
3. Sulfated batteries have high resistance causing a quick rise in voltage.
I welcome your response but please reply off list.
Respectfully yours,
Larry
On May 28, 2012, at 6:42 AM,
<<mailto:[email protected]>[email protected]>
<<mailto:[email protected]>[email protected]> wrote:
Seems I have a stalwart "Battery Specialist" in the neighborhood
still convincing folks that de sulphators are the smartest thing
since sliced bread (And slamming anyone who disagrees). In my
experience, sparklers have little to no effect on battery longevity
and in most cases add unlisted, hazardous and unnecessary wiring
devices to a potentially hazardous environment. Is tar and
feathering still an acceptable means of dispute resolution.. or am I
totally missing something? tks db
Dan Brown
Foxfire Energy Corp.
Renewable Energy Systems
(802)-483-2564
<http://www.Foxfire-Energy.com/>www.Foxfire-Energy.com
NABCEP #092907-44
-------- Original Message --------
Subject: Re: [RE-wrenches] Troubleshooting Off-grid PV
From: "Larry Crutcher, Starlight Solar Power Systems"
<<mailto:[email protected]>[email protected]>
Date: Sun, May 27, 2012 7:37 pm
To: RE-wrenches
<<mailto:[email protected]>[email protected]>
Hi Eric,
Check the dates on the KC-120 module label. If any were manufactured
between January 1999 and December 2002, they have or will fail. We
have been replacing these modules for over 8 years now. There was a
defective solder joint during manufacture. Kyocera will still
replace them under warranty even though they have no legal
requirement to do so. They will ship you remanufactured 120's and
pay for return shipping. Contact Kyocera about the procedure.
If the batteries are sulfated, they will not produce the load
necessary to drive the current high. Capacity has nothing to do with
it; internal resistance does. You can test the array by pulling the
voltage down (turn on some big loads) at solar noon. This will force
the controller into bulk and reveal the maximum current the array
can produce. I think you have two problems here. With bad modules,
you may not see much.
It is typical for a controller to transition to float very early in
the charge cycle if the battery is sulfated. Look for a fast rise in
voltage in the morning. This is an indicator of sulfated battery. A
healthy battery will slowly climb in voltage.
Let me k now if you need more understanding about batteries,
charging and why MOST of them never see old age. It's my speciality.
Larry Crutcher
Starlight Solar Power Systems
(928) 342-9103
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