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<DIV><SPAN class=171100314-29062010><FONT face=Arial>Here in a region with a
huge percentage of homes having natural gas furnace heaters [with
resistance backup,] carbon monoxide fumes are a very real concern. If her
house has a NG or oil burning furnace I'd look there for a stuck or
mal-adjusted pilot light. If her house is sealed tight, and I'll
wager that hers is, the only route for CO out of the
basement could be thru the vent for the battery bank. If the house has a
positive pressure, that might explain the concentration of CO in the
battery room. Even though it's lighter than air it's heaver than H.
</FONT></SPAN></DIV>
<DIV><SPAN class=171100314-29062010><FONT face=Arial></FONT></SPAN> </DIV>
<DIV><SPAN class=171100314-29062010><FONT face=Arial>
<DIV><FONT size=2>Jim Duncan</FONT></DIV>
<DIV>
<DIV><FONT size=2>North Texas Renewable Energy</FONT></DIV></DIV>
<DIV><FONT size=2>486 W.N. Woody Road</FONT></DIV>
<DIV><FONT size=2>Azle Texas 76020</FONT></DIV>
<DIV><FONT size=2>Since 1993</FONT></DIV>
<DIV>
<DIV><FONT size=2>NABCEP Certified Solar PV</FONT></DIV>
<DIV><FONT size=2>Installer No.31310-57</FONT></DIV></DIV>
<DIV><A href="mailto:ntrei@1scom.net"><FONT
size=2>ntrei@1scom.net</FONT></A><FONT size=2> </FONT></DIV>
<DIV><FONT size=2>817.917.0527</FONT></DIV>
<DIV><A href="http://www.ntrei.com/"><FONT size=2>www.ntrei.com</FONT></A></DIV>
<DIV><FONT face=Arial></FONT> </DIV></FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
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 8:50 AM<BR><B>To:</B>
re-wrenches@lists.re-wrenches.org<BR><B>Subject:</B> [RE-wrenches] Battery
Bank Off-gassing CO?<BR><BR></FONT></DIV>
<DIV class=WordSection1>
<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 id=Picture_x0020_1 height=189 alt=Danny
src="cid:171100314@29062010-210e" width=178><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV></BLOCKQUOTE></BODY></HTML>