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<p class=MsoNormal><span style='color:#1F497D'>Hello Daniel,<o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Unfortunately, I’ve had to
deal with this issue in the past and after countless hours of effort
(end-users, fire departments, and my own), the conclusion and/or corrective
action has always been to replace the CO detector. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='color:#1F497D'>Carbon
monoxide or other carbon oxides are not expected byproducts from a lead-acid
battery. Lead-acid batteries essentially have three active materials, which
broadly speaking are lead dioxide, spongy lead, and sulfuric acid. Since no
carbon exists in the active components, carbon monoxide cannot be a byproduct
of lead-acid batteries. Lead-acid batteries do produce small amounts of oxygen
and hydrogen while they are being charged. Particularly, as the battery
approaches the end of charge. Most battery designs will start producing
oxygen when the battery reaches a state of charge of about 70% SOC and will
produce hydrogen at about 90% SOC. Both gases will continue to be liberated
until the charge is complete. <o:p></o:p></span></p>
<p class=MsoNormal style='text-align:justify'><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Hydrogen has been known to be an
interference gas for some CO detectors. The sensing technology of CO detector
will largely determine how much hydrogen cross-sensitivity it will have, but
there is also a hydrogen concentration threshold that will trigger some CO
detectors. In most cases, the problem will go away if the end-user improves the
ventilation of the room. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'>Sounds like you are taking all
the appropriate steps to resolve the problem… Let me know how it goes. <o:p></o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'>Best Regards,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'>Ronald Paredes<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'>Technical
Product Manager – Renewable Energy<o:p></o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:maroon'>Trojan Battery
Company<o:p></o:p></span></b></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'>12380 Clark
Street <o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'>Santa Fe
Springs, CA 90670<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'>Tel:
(562)236-3000 Ext. 3066<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'>Fax:
(562)236-3279<o:p></o:p></span></p>
<p class=MsoNormal><a href="mailto:rparedes@trojanbattery.com"><span
style='font-size:8.0pt'>rparedes@trojanbattery.com</span></a><span
style='font-size:8.0pt;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><a href="http://www.trojanbattery.com/"><span
style='font-size:8.0pt'>www.trojanbattery.com</span></a><span style='font-size:
8.0pt;color:#1F497D'><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:8.0pt;color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><b><span style='font-size:8.0pt;color:maroon'>Trojan Battery
Company - Clean Energy for Life™</span></b><span style='font-size:8.0pt;
color:#1F497D'><o:p></o:p></span></p>
</div>
<p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p>
<div>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'>
<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
re-wrenches-bounces@lists.re-wrenches.org
[mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>Daniel
Young<br>
<b>Sent:</b> Tuesday, June 29, 2010 6:50 AM<br>
<b>To:</b> re-wrenches@lists.re-wrenches.org<br>
<b>Subject:</b> [RE-wrenches] Battery Bank Off-gassing CO?<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I was emailed recently by someone in my area saying that she
thinks here battery bank is going bad and poisoning her home…. My firm
did not install her off grid system. Her original installer will not respond.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>She has an 6yr old battery bank w/ 6 Trojan L16H’s
(48V). The system has 1.2kw of shell solar modules with an MX60 CC and FX
Inverter. She noticed feeling ill when in the basement where the system
electronics were installed, so she got out a combustion gas analyzer, (she is a
home energy auditor), and recorded over 500 ppm CO in the battery bank storage
closet, not the battery box, but the closet that stores the outback system.
That is over double the concentration that the US Consumer Product Safety
Commission considers deathly toxic. She reports this has been going on for the
last 1-2 months. There is one battery box in this closet, with a 3” PVC
vent pipe going up to the roof. There is no power vent.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Has anyone heard of a flooded lead acid battery bank
emitting CO? I did not think that a lead/sulfur based battery was capable of
this. Is it possible that her combustion gas analyzer is mis-interpreting some
other gas as CO?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We already plan to install a power vent at minimum, and to
closely inspect her ventilation system and improve it as needed. Just curious
if anyone else has seen this happen before.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><img border=0 width=178 height=189 id="Picture_x0020_1"
src="cid:image001.jpg@01CB175F.58C3F3C0" alt=Danny><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
</div>
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