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benn,<br>
I'm not aware of any listed battery vents. Given the cost of
listing, and the size of the market, it's unlikely there ever will
be. Wanna pay $300 for a listed vent? I have never had an issue with
an inspector about them.<br>
<br>
You might consider a standard AC squirrel cage fan from Grainger or
some such, controlled by a 12V-coil relay on an FM60 or similar
controller's auxiliary vent fan circuit. It would then only run when
the batteries are nearly full.<br>
<br>
Other ideas? Try the approach that if there is no listed product,
the inspector is allowed to allow a reasonable alternative. Most
likely the batteries are also unlisted - compared to that, the vent
fan is minor.<br>
<br>
I use intake vents; otherwise how can the exhaust fan work if the
box is well sealed? The objective is to draw the hydrogen gas up and
out, not just suck on it while it accumulates inside the box.<br>
<br>
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<p class="MsoNormal" style=""><span class="il"><b style="">Allan</b></span><b
style=""> Sindelar</b><span style="font-size: 10pt;"><br>
<a href="mailto:Allan@positiveenergysolar.com"
target="_blank"><span class="il">Allan</span>@positiveenergysolar.com</a><br>
NABCEP Certified Photovoltaic Installer<br>
EE98J Journeyman Electrician<br>
<b style="">Positive Energy, Inc.</b><br>
3201 Calle Marie<br>
Santa Fe, New Mexico 87507<br>
<b style="">505 424-1112</b><br>
<a href="http://www.positiveenergysolar.com/"
target="_blank">www.positiveenergysolar.com</a></span></p>
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<br>
On 2/25/2011 4:55 PM, benn kilburn wrote:
<blockquote cite="mid:COL121-W8A444260A80C213CBA6F0ADDD0@phx.gbl"
type="cite">
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Good Afternoon Wrenches,
<div><br>
</div>
<div>In recommending for a client, the materials and plans for
constructing a battery box for a 48V, 2400Ah battery, it came to
my attention that the only battery box vent fan that i am aware
of on the market (the Zeypher) is not UL listed, let alone
approved for use in Canada. So now i am in search of such a
product.</div>
<div><br>
</div>
<div> My plans thus far are to have a well sealed box (? at least
the upper portion of the box ?) with vent holes in the
upper-most part of the box piped together and connecting to one
outside exhaust vent. I was planning on using (at least) two of
the power vent fans at the top holes of the battery box, but
after mentioning using this product to the inspector, he said
that the vent fan would be required to bear the proper approval
markings. </div>
<div>I am still trying to determine if there should be lower
'intake' vents as well.</div>
<div><br>
</div>
<div>If this power vent is not even listed, what are your feelings
on using them in a permitted and inspected system? </div>
<div><br>
</div>
<div>Is anyone aware of an (approved) product or method for
'power' venting a battery box?</div>
<div><br>
</div>
<div>I have read some of the extensive threads here on battery
boxes and have not found a definitive practice for venting a
battery box. I'd be happy for someone to point me in the right
direction if i have missed something. There seems to be quite a
range of opinions on the need for providing a (lower) intake and
(higher) exhaust vent. </div>
<div><br>
</div>
<div>Thanks,</div>
<div>benn</div>
<div><br>
</div>
<div><br>
<span class="ecxecxecxecxEC_Apple-style-span" style="color:
rgb(0, 32, 96);"><font class="ecxApple-style-span"
face="'Franklin Gothic Medium'">DayStar Renewable Energy
Inc. </font></span>
<div>
<div><font class="ecxApple-style-span" face="'Franklin Gothic
Medium'"><a class="moz-txt-link-abbreviated" href="mailto:benn@daystarsolar.ca">benn@daystarsolar.ca</a></font></div>
<div><font class="ecxApple-style-span" face="'Franklin Gothic
Medium'">780-906-7807 </font></div>
<div><font class="ecxApple-style-span" face="'Franklin Gothic
Medium'">HAVE A SUNNY DAY
</font></div>
<div><br>
</div>
</div>
<br>
<br>
</div>
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