[RE-wrenches] Trojan L-16 SG Readings- Did Something Change?

Tue Sep 4 12:29:17 PDT 2012

Are you correcting for the changes in SG with the temperature increase?

I used to be able to get hydrometers with a built in thermometer and chart
but no longer have one. It died as most do, with a crash and shattering
sound.

Bob Ellison

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Sequoya
Cross
Sent: Tuesday, September 04, 2012 3:23 PM
To: 'RE-wrenches'
Subject: Re: [RE-wrenches] Trojan L-16 SG Readings- Did Something Change?

Thank you John. Is anyone else out there seeing specific gravity
measurements outside of what Trojan is stating on the spec sheets? 

John, we are not seeing these SG readings, no matter how much we equalize,
we are still seeing readings that are about .015+/- low after several
equalizations. This is on newer batteries, and within the plate forming
period. Do you have a SG reading that we should be looking for during the
first 18 months (or XX amount of cycles until the plates are properly
formed)?

Thanks-

Sequoya Cross
1589 Rapid Lightning Creek Rd
Sandpoint, Idaho 83864
 <http://www.backwoodssolar.com/> www.backwoodssolar.com

Phone(208)263-4290  

Fax (888) 273-8279

We are an online and catalog business that caters to off-grid and grid-tie
customers, with technicians that own and operate a variety of renewable
energy systems using the products that we sell. We take great pride in
getting to know our products so that we can recommend the best for our
customers.

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of John
DeBoever
Sent: Friday, August 31, 2012 1:05 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Trojan L-16 SG Readings- Did Something Change?

Sequoya, Wrenches,

Thank you for your patience on this, as I had no easy Internet connection.
Below are the clarifications requested. 

*  Trojan Premium L16RE-B datasheet can be found here:
http://www.trojanbatteryre.com/PDF/datasheets/L16REB_TrojanRE_Data_Sheets.pd
f 

*  Trojan Premium line (
http://www.trojanbatteryre.com/PDF/Premium_Trojan_ProductLineSheet.pdf   )
has indeed changed its specific gravity from nominal 1.260+-0.007 to nominal
1,280+-0.007 since March 2012 production.  This change was motivated to
reduce the confusion in the field between Trojan Premium line S.G. values
and Trojan Signature line S.G. values.  They are now identical.  Only Trojan
IND line S.G. remain at 1.260 .

*  During the beginning of the life of the battery, an optimized development
process of the plates porosity will take place to maximize the surface
access contact between the electrolyte and the lead sulfate crystal within
Trojan proprietary exclusive paste formulation.  This optimum moisture of
the active material at the beginning of the battery life is the continuation
of an advanced factory-controlled 72-hour curing process and increase the
electrical conductivity and improved discharge performance of the active
material paste, resulting in Trojan's proven both sustained capacity and
total overall ampere-hours,  resulting in more operating power. The
variation can reflect approximately 7 points in the S.G. 

*  The date code can be found on the negative terminal and consist of one
letter and one figure.  The figure for 2012 is "2". Any date code from and
after "E2"  (i.e. Code date with letter E2, F2, G2,.)

will have a nominal S.G. of 1.280 . Prior that, the nominal S.G. was 1,260.

I hope that helps,

John 

John F. DeBoever

Global Technical & Projects Director - Renewable Energy

Trojan Battery Company

12380 Clark Street 

Santa Fe Springs, CA 90670

Tel: +1-562-236-3000 Ext. 3139

Cell: +1-845-514-7600 - NY office time zone: USA EST (GMT-5)

Skype: john.f.deboever

Fax: +1-562-236-3239

 <mailto:jdeboever at trojanbattery.com> jdeboever at trojanbattery.com

 <http://www.trojanbattery.com/> www.trojanbattery.com

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Sequoya
Cross
Sent: Thursday, August 30, 2012 3:08 PM
To: re-wrenches at lists.re-wrenches.org
Subject: [RE-wrenches] Trojan L-16 SG Readings- Did Something Change?

We are wondering if anybody knows when the Trojan L-16RE-B batteries went
from full SG readings of 1.265 (after an 18 month "plate forming" period) to
1.280 that they now state on the data sheet. We have been having customers
use 1.250 as a full reading which would gradually increase over time to
1.265 and that might take/might not be seen for 18 months. Now we see that a
"full reading" should be 1.280 and maybe still a "plate forming" period or
maybe not? Does anyone know the date code that we can use with customers to
see what they should be looking for (should have been somewhere between 2010
and 2012)? I have this question out to Trojan as well, but haven't received
confirmation and wanted to know what data you all were seeing as well.

Thanks-

Sequoya Cross
1589 Rapid Lightning Creek Rd
Sandpoint, Idaho 83864
 <http://www.backwoodssolar.com/> www.backwoodssolar.com

Phone(208)263-4290  

Fax (888) 273-8279

We are an online and catalog business that caters to off-grid and grid-tie
customers, with technicians that own and operate a variety of renewable
energy systems using the products that we sell. We take great pride in
getting to know our products so that we can recommend the best for our
customers.

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