Steve,
Good advice but I'm not at all surprised that most folks don't have a 
hydrometer. Frankly, unless you are willing to spend a bunch of dough, you 
aren't going to get one that is worth having. And, they are damn hard to find. 
The $5 cheapies with the floating balls, etc are just worthless, IMO. 
Bob-O

On Aug 7, 2013, at 3:11 PM, Steve Higgins wrote:

Maybe, I’m overstepping here… but here goes.
 
In most off grid systems you are going to run just a tad bit hotter 
voltage/time.  This is because most of the batteries that are sold into this 
market were really designed and meant for Industrial applications.   The 
industrial application assumes that you are pretty much charging the battery 
with a stiff grid sourced current based charger every single night.
 
In most off grid systems the customer is slowly letting the battery fall to a 
25% or 50% DOD state of discharge before enabling a fossil fuel source to bring 
the battery to full state.     When these batteries are run at lower state for 
a period of time they need a bit more voltage to remove the sulfation that has 
developed on the plates.  
 
What I’ve found over the last year is many people are depending on way too 
small of an array to get any battery bank charged, and of course are very 
reluctant to use a genset to power an inverter to charge the batteries.   This 
leads to poor SG’s and eventual failure. 
 
It also amazes me with how many people don’t even own a hydrometer to check the 
true state of charge on their battery.   Talked with a guy that has his 
batteries for 5 years and has NEVER taken an SG measurement.
 
 
 
Steve Higgins
Technical Services Manager
M: +1.206.790.5840
F: +1.902.597.8447
Surrette Battery Company
Exclusive manufacturer of
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From: re-wrenches-boun...@lists.re-wrenches.org 
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of RE Ellison
Sent: Wednesday, August 07, 2013 2:29 PM
To: al...@positiveenergysolar.com; RE-wrenches
Subject: Re: [RE-wrenches] Trojan L-16s
 
I would be more inclined to think it's because of a denser plate material in 
the larger batteries
 
I know surrettes need longer absorbs and I believe a bit higher of a charging 
voltage to remain happy
 
And I generally run the Trojan L16s Just a bit higher than normal
 



Bob Ellison

On Aug 7, 2013, at 3:33 PM, Allan Sindelar <al...@positiveenergysolar.com> 
wrote:

Eric,
I kept this in my inbox for awhile, and finally had to ask - where did you get 
this information? I have never heard this recommendation - to charge a taller 
flooded lead acid battery to a higher voltage just because it's taller. I guess 
I see the apparent logic - more gassing addresses a potential for more 
stratification of the electrolyte - but if true, why have I never seen this in 
any battery service guide? What's your source? And has anyone else heard of 
this?
Thanks, Allan

Allan Sindelar
al...@positiveenergysolar.com
NABCEP Certified PV Installation Professional 
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
Founder and Chief Technology Officer
Positive Energy, Inc., a Certified B CorporationTM
3209 Richards Lane
Santa Fe, New Mexico 87507
505 424-1112 office 780-2738 cell
www.positiveenergysolar.com
On 7/16/2013 7:53 AM, eric.bent...@schneider-electric.com wrote:

Hi Drake, 
The L16 is quite popular in RE apps...but they typically require a bit higher 
charge voltage to reach the correct SOC than their shorter counterparts (i.e. 
T105 golf cart), 
because they are a taller battery (stands to reason .....specific "gravity"). 
Make sure they are in a vented enclosure if off-gassing will be an issue. 
Eric
_____________________________________________________________________________________
 

Eric Bentsen  |   Schneider Electric   |  Solar Business  |   UNITED STATES  |  
 Technical Support Representative 
Phone: +(650) 351-8237 ext. 001#  |   
Email: eric.bent...@schneider-electric.com  |   Site: 
www.schneider-electric.com/solar  |   Address: 250 South Vasco Rd., Livermore, 
CA 94551

 
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