Wrenches,
Thank you for your patience (as I was busy all day). I appreciate the valid
issues raised and good perspectives provided so far by the Wrenches. I will try
my best to clarify the hydrogen production issues as follow.
ยท All lead acid batteries, flooded and VRLA require ventil
Correction: I meant to say .05*C20 for AGM equalization current.
Larry
On Jan 6, 2012, at 4:48 PM, Larry Crutcher, Starlight Solar Power Systems wrote:
Hello William,
My understanding is once the SO4 is fully absorbed, excess H and O are produced
and could be vented if the pressure rises abov
Hello William,
My understanding is once the SO4 is fully absorbed, excess H and O are produced
and could be vented if the pressure rises above 5psi. So, when saturation is
complete, voltage should be reduced and no gassing would take place. For this
reason, I always recommend using charge curre
Hi John,
I am curious about what you saying "float or equalization". Here's my
understanding: If the battery is able to accept all current presented, the
electrochemical process, SO4 combining with H released through decomposition,
is balanced and with little excess gas released. When the elect
In reference to William's comment about equalizing VRLA batteries,
see page 17 of Concorde Battery's SunXtender technical manual,
available online at
http://www.sunxtender.com/pdfs/Sun_Xtender_Battery_Technical_Manual.pdf.
They instruct charging these AGM VRLA batteries
Hi Wrenches;
Here's an update on the breaker problem. Midnite is getting their
breakers changed over to the sturdier posts. I had less trouble with
the Epanel, than working backwards in the super deep Outback box,
anyway. Hopefully Outback will follow suit now? As I stated before, I
would
Wrenches,
While looking for information regarding standards about battery room
ventilation I ran into this link, which has some good information and is
certainly worth everyone's attention.
http://www.belvoir.army.mil/safety/inc/battery-explosion.asp
Kent Osterberg
Blue Mountain Solar, Inc.
Larry:
I always thought that any breach of a valve in a VRLA battery was a sign of
a failure. I recently spoke with a technician at MK Batteries and learned
that venting and/or seepage is not uncommon and not a sign of failure.
I have also heard in the distant past and then read recently on
You beat me to that one, Kent. Also, if your VRLA battery is emitting any gas,
you've got trouble.
Larry Crutcher
Starlight Solar Power Systems
On Jan 5, 2012, at 5:58 PM, Kent Osterberg wrote:
John,
Could you clarify units? "0.418 Liters/AH" is that per charge cycle? per hour?
per minute?
Kent,
Thank you for pointing at the units. Please note that:
* You are looking for cc/hr/Ah/cell rates at float and equalization
voltages.
* Gassing is a function of charging current (FLA: an ampere-hour of
overcharge, i.e. during float or equalization mode, results in about 0.
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